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Journal articles on the topic 'Geotextiles'
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1
Choudhary, Nikita. "Jute Geotextiles as Substitute to Synthetic Geotextiles." Advanced Materials Research 821-822 (September 2013): 85–89. http://dx.doi.org/10.4028/www.scientific.net/amr.821-822.85.
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Jute based geotextile as a substitute to synthetic geotextiles has been reviewed in this study. The importance, advantage and disadvantage of Jute based geotextile have been highlighted. Geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain. The degrading condition of the environment and presence of non-biodegradable residues of geotexties as a pollutant has caught attention of scientific researchers. Ecological sustainability and environment has become one of the prime issues in the modern developmental strategy .Jute fibre has been found to be an alternate and potential geotextile material. Studies have shown that lifespan and engineering properties of jute based geotextiles can be suitably modified to suit its intended use.
2
Liu, Weichao, He Li, Yan Yang, Peng Xu, Zhengjie Dai, Guangqing Yang, He Wang, and Zhijie Wang. "Study on Improvement Characteristics of a Novel Geotextile with Stitched Transverse Ribs." Applied Sciences 13, no. 3 (January 24, 2023): 1536. http://dx.doi.org/10.3390/app13031536.
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Geotextile is one of the reinforcement materials adopted in many engineering structures. Conventional geotextiles have a limited reinforcement effect due to the insufficient friction strength between geotextiles and soils. This paper proposes a novel type of geotextile with stitched transverse ribs to improve the reinforcement effect. A series of large-scale direct shear tests have been conducted, and the improvement characteristics between conventional geotextiles, geogrids, and the novel geotextiles have been studied. The results show that the novel stitched transverse rib geotextiles can significantly increase the shear strength compared to conventional geotextiles and geogrids. Moreover, due to the restraint and friction effect of ribs on the soils, the reinforcement effect of the novel geotextile is increased with increasing ribs. Insights from this study can provide a new understanding of the novel stitched transverse ribs geotextile’s reinforcement mechanism in engineering.
3
Rowe, R. Kerry, Chris J. Caers, and Cliff Chan. "Evaluation of a compacted till liner test pad constructed over a granular subliner contingency layer." Canadian Geotechnical Journal 30, no. 4 (August 1, 1993): 667–89. http://dx.doi.org/10.1139/t93-057.
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The construction and evaluation of a compacted clayey till test pad constructed over a stone layer are described. The evaluation of the clayey liner involved (i) excavation of six test pits through the liner, followed by careful visual inspection for defects in the liner; (ii) sampling of the liner using standard 75 mm diameter Shelby tubes, a 150 mm diameter piston sampler, and block sampling; (iii) triaxial hydraulic conductivity tests on samples of liner material consolidated to a number of stress levels relevant to the proposed design; and (iv) diffusion tests on samples of liner material. Based on the results it is concluded that it was possible to construct a low-permeability liner (hydraulic conductivity less than 1.4 × 10−8 cm/s under expected field stress conditions). Geotextiles from above and below the compacted liner were carefully exhumed and subjected to a series of laboratory tests to examine (i) the effect of construction damage on the geotextile's strength; (ii) the effectiveness of the geotextile to minimize intrusion of the clay liner through the geotextile and into the stone layer(s) under expected field stress conditions; (iii) the effectiveness of the geotextile as a filter for the compacted liner material under high upward gradient conditions; and (iv) the friction angle between the geotextile and clay, and geotextile and stone. The geotextiles exhumed from the test liner showed some evidence of construction damage; however, based on the field observations and subsequent laboratory tests, it is concluded that they performed adequately. Key words : waste disposal, clay liners, geotextiles, field performance, hydraulic conductivity, landfills.
4
Palmeira, E. M., R. J. Fannin, and Y. P. Vaid. "A study on the behaviour of soilgeotextile systems in filtration tests." Canadian Geotechnical Journal 33, no. 6 (December 1, 1996): 899–912. http://dx.doi.org/10.1139/t96-120.
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The behaviour of soilgeotextile systems in filtration tests is reported for nonwoven geotextiles under unidirectional flow. A new apparatus was developed to preform filtration tests under an applied vertical stress, and tests were then conducted with different soils and nonwoven geotextiles in order to evaluate the clogging potential and retention capacity of these materials under rather severe combinations of geotextile and soil characteristics. Results show that the geotextiles perfomed well and that observed permeability losses were acceptable even for gradient ratios close to 3. No progressive piping was observed, and it is believed that the retention capacity of the geotextiles may be influenced by their manufacturing process. In general, theoretical predictions for the maximum particle size passing through the geotextile compared well with measurements. Key words: geotextiles, filtration, gradient ratio, permeability, soil retention, clogging.
5
Wang, Xu, Yonghong Zhang, Liqin Fan, and Jingli Shen. "Salt Drainage Efficiency and Anti-Clogging Effects of Subsurface Pipes Wrapped with Geotextiles." Water 16, no. 10 (May 14, 2024): 1392. http://dx.doi.org/10.3390/w16101392.
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Subsurface drainage pipes covered with filters and geotextiles are the key to preventing clogging and ensuring efficient drainage. To improve the salt discharge efficiency of these subsurface drainage pipes, different layers of geotextiles were set outside the pipes with the aid of uniform gravel filters. This paper reports our findings from laboratory simulation of subsurface drainage pipes and experiments. The study examined the influence of different layers of geotextiles on the drainage efficiency, salt discharge effects of subsurface drainage pipes, and the effect of superimposed geotextiles on the salt drainage efficiency as well as the anti-clogging effect of subsurface drainage pipes. The results are as follows: (1) The geotextile and filter material wrapped around the subsurface pipe facilitated the movement of water towards the subsurface pipe, which could promote the salt discharge of the subsurface pipe. However, in the single leaching experiment, the reduction in soil pH was not significant for different scenarios. (2) The salt removal rate of the geotextile-wrapped subsurface pipes was more than 95%. The salt removal rate of the double-layer geotextile scenario was the highest (96.7%), and the total salt content of soil profiles was 8.3% and 31.3% lower than those of the single-layer and triple-layer geotextile scenarios, respectively. The drainage efficiency of the double-layer geotextile scenario was the highest, and the salt distribution in the 0–60 cm profile was relatively uniform, ranging from 2.3 to 3.0 g∙kg−1. (3) The clogging in the triple-layer geotextile scenario was caused by the geotextile, i.e., a dense filter cake layer formed on the surface of the geotextile. The clogging in the single-layer and double-layer geotextile scenarios was the clogging of the geotextile itself, i.e., soil particles retained in the fiber structure of geotextiles. (4) In the case of the single-layer and double-layer geotextile scenarios, the soil particles failed to completely clog the selected geotextiles, and there were still a large number of pores retained. The double-layer geotextiles integrate filtration, clogging prevention, and drainage promotion to provide the best salt drainage with the subsurface pipe. This study reveals the influence of the filter on soil water salt and salt discharge and provides a theoretical explanation and technical justification for the application of the subsurface pipes salt discharge technology in saline soil ameliorate.
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Lassabatère, L., T. Winiarski, and R. Galvez-Cloutier. "Can geotextiles modify the transfer of heavy metals transported by stormwater in infiltration basins?" Water Science and Technology 51, no. 2 (January 1, 2005): 29–36. http://dx.doi.org/10.2166/wst.2005.0029.
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Geotextiles are fibrous materials increasingly employed for the design of infiltration basins. However, their influence on the transfer of contaminants carried by stormwater has not been fully investigated. This study, based on column leaching experiments, aims at showing the effect of geotextiles on the transfer of three heavy metals (Zn, Pb and Cd) in a reactive soil (simulating an infiltration basin at laboratory scale). This effect depends on several factors, such as type of geotextile, hydric conditions (geotextile water content), hydraulic conditions (flow-rates) and the number of geotextiles installed. In all cases, geotextiles influence heavy metal retention by modifying flow and thus regulating contact between these metals and the reactive soil.
7
Eigenbrod, K. D., J. P. Burak, and J. G. Locker. "Differential shear movements at soil-geotextile interfaces." Canadian Geotechnical Journal 27, no. 4 (August 1, 1990): 520–26. http://dx.doi.org/10.1139/t90-066.
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The shear deformation behaviour along soil–geotextile interfaces has been investigated and is compared with that of the respective soils. Six soils (two sands, two clays, and two peats) in combination with eight different geotextiles (woven and nonwoven) were tested at various conditions in direct shear. It was found that the stiffnesses during shearing for the sand-geotextile interfaces were less than those for the actual sand, by a factor that was largely independent of the normal stress level. The same behaviour was found for the clays and for one of the peats in contact with non-woven geotextiles. For woven geotextile interfaces in contact with the clays and the peats, the load deformation behaviour was generally stiffer than for the actual soils. Key words: geotextiles, differential shear, soil–geotextile interfaces, load transfer during shear.
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Du, Chunxue, Chao Xu, Yang Yang, and Jiangfeng Wang. "Filtration Performance of Nonwoven Geotextile Filtering Fine-Grained Soil under Normal Compressive Stresses." Applied Sciences 12, no. 24 (December 9, 2022): 12638. http://dx.doi.org/10.3390/app122412638.
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To avoid serious clogging and loss of drainage capacity, which puts the underground structure at risk of anti-floating failure, the buried drainage filter must be equipped with a nonwoven geotextile layer. In this scenario, nonwoven geotextiles are subjected to normal compressive stress, which can cause changes in geotextile porosity and structure, affecting the filtration behavior of the geotextile filter. In this paper, in order to evaluate the filtration compatibility of the soil–geotextile system, gradient ratio (GR) tests were performed under a hydraulic gradient of 1.0 using a specially designed gradient ratio filtration device capable of applying normal stress. In total four nonwoven geotextiles and two types of soil were used. The results of the gradient ratio filtration tests were discussed in terms of GR values, the permeability of the soil–geotextile system, and the amount of fines retained in geotextiles. It was shown that under a larger normal compressive stress, the GR value would also increase, while the permeability coefficient of the soil–geotextile system decreased. The filtration responses to various soil–geotextile combinations differed under normal compressive stress. A thick nonwoven geotextile with a small filtration opening size exhibited poor filtration performance while benefiting soil retention. Fines retention was influenced by geotextile thickness, soil type, and normal compressive stress magnitude. In addition, for nonwoven geotextiles filter fine-grained soil under normal compressive stress, the test results indicated that anticlogging design criteria should be improved.
9
Hsing, Wen Hao, Ching Wen Lou, Ching Wen Lin, Jin Mao Chen, and Jia Horng Lin. "Effects of the Content of High Strength Polyethylene Terephthalate Fiber and Kevlar Fiber on Properties of Geotextiles." Applied Mechanics and Materials 365-366 (August 2013): 1082–85. http://dx.doi.org/10.4028/www.scientific.net/amm.365-366.1082.
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Geotextiles have been commonly used globally, making the control of material selection to influence geotextiles properties an important research topic. This study aims to explore the effects of the ratio of high-strength polyethylene terephthalate (HPET) fiber to Kevlar fiber on hybrid geotextiles. At the first stage, HPET and polyethylene terephthalate (PET) fiber are combined to make HPET/PET hybrid geotextile and then tested for porosity and water permeability, determining the optimum HPET/PET ratio. At the second stage, with a content of 60 % PET fibers, HPET fibers and Kevlar fibers are mixed with various ratios to form Kevlar/HPET/PET hybrid geotextiles. The experimental results show that with an increase in the content of HPET fibers, the porosity and water permeability of the Kevlar/HPET/PET hybrid geotextile decrease.
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U.S. Sarma. "Enhancement of Properties of Coir Geotextiles by Natural Rubber Latex Coating." CORD 27, no. 1 (April 1, 2011): 8. http://dx.doi.org/10.37833/cord.v27i1.119.
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Coir geotextiles find application in revegetation of slopes by stabilizing the soil through erosion control. It has been found that the longevity of coir geotextiles although highest among all the natural fibres, it is required to last for at least 5 years so as to sustain the vegetation on the slopes for a long term solution. Normally it is found that coir geotextiles lose their 50% strength in 6 months in contact with soil, therefore it is required to strengthen the coir geotextiles.
This work involves the coating of coir geotextiles with natural rubber latex which could enhance the longevity of coir geotextiles in various civil/bio engineering applications. The rubber latex coated coir geotextiles which are eco-friendly have superior mechanical properties and better durability compared to the conventional uncoated coir geotextiles.
This paper reports the coating of coir geotextile using natural rubber latex and a comparative study of the physical and mechanical properties of the treated and untreated coir geotextiles.
11
Long, Xiaoyun, Lifen He, Yan Zhang, and Mingqiao Ge. "Multicomponent Composite Emulsion Treated Geotextile on Landfill with Improved Long-Term Stability and Security." Journal of Engineered Fibers and Fabrics 13, no. 3 (September 2018): 155892501801300. http://dx.doi.org/10.1177/155892501801300307.
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Polypropylene geotextiles were treated with multicomponent composite emulsion consist of polytetrafluoroethylene (PTFE), nona-silica and fluorous acrylate. After process of treatment, the treated geotextiles showed greater long-term stability and security than untreated geotextiles on the landfill slope. Firstly, the surface of fibers was investigated by scanning electron microscopy (SEM). Composite thin film was found on them, indicating the successful attachment of ternary composite agents on fibers through pad-drying method. Subsequently, the effect of weathering stability and metallic ions (cupric ions usually) resistance on mechanical properties of samples were studied by using tensile machine. The friction angle values of various interfaces and tension in geotextile versus slope angle were also studied via tilt table test. Our mechanics performance tests indicated that the weathering ability and cupric ions resistance of geotextile were greatly improved via treatment with the composite emulsion. The roughness of geotextile surface, the friction angles of all interfaces and tension in geotextile on landfill slope were decreased.
12
Wojtasik, Dariusz. "An analysis of physical, hydraulic and mechanic properties of nonwoven needle-punched geotextiles." Annals of Warsaw University of Life Sciences - SGGW. Land Reclamation 40, no. 1 (January 1, 2008): 115–23. http://dx.doi.org/10.2478/v10060-008-0043-0.
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An analysis of physical, hydraulic and mechanic properties of nonwoven needle-punched geotextiles An analysis of physical, hydraulic and mechanic properties of needle-punched nonwoven geotextiles. This paper presents an analysis of technical parameters of needle-punched geotextiles used in engineering constructions. The tests were carried out in order to compare of physical, hydraulic and mechanic properties of needle-punched geotextiles in two different groups of products. First of group, geotextiles, were made of polypropylene fibers (PP) and the second one fabrics, were of polyester filaments (PES). The tests were performed for materials of mass per unit area 250, 400 and 600 g/m2. The results of test showed that parameters of geotextile material depend on structure of fabrics.
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Henry, Karen S. "Geotextiles to Mitigate Frost Effects in Soils: A Critical Review." Transportation Research Record: Journal of the Transportation Research Board 1534, no. 1 (January 1996): 5–11. http://dx.doi.org/10.1177/0361198196153400102.
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The use of geotextiles to mitigate frost effects in soils has been studied, but few techniques have been developed. Guidelines developed for the placement of granular capillary barriers are presented to serve as preliminary guidelines for geotextile capillary barriers. Laboratory research shows that pore size distribution, wettability, and, for some geotextiles, thickness influence capillary barrier performance in a given soil. Geotextiles that easily wet do not reduce frost heave and may even exacerbate it. On the basis of the literature reviewed, guidance for selection of geotextile capillary barriers in field trials is given. If geotextiles function as capillary barriers during freezing and reinforce or separate and filter the subgrade at the base course interface during thaw, then the potential exists for their use in a combination of functions to reduce frost-related damage in geotechnical structures. It was found that properly designed geotextiles have the potential to reduce frost heave by functioning as capillary barriers, they can be filters for capillary barriers, and they can provide reinforcement or separation or filtration (or all of these) of the subgrade soil to reduce thaw-related damage.
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Shahnamnia, Alireza, Masoud Mirmohammad Sadeghi, Seyed Mahdi Hejazi, and Sayed Mahdi Abtahi. "Investigation the effect of geotextiles on the absorption of oil contamination and soil geotechnical properties." Journal of Industrial Textiles 53 (January 2023): 152808372211320. http://dx.doi.org/10.1177/15280837221132015.
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Oil-contaminated soil is detrimental to the ecosystem. There are various methods for purifying and controlling oil-contaminated soil. Among these, the use of oil absorbent geotextiles is considered a new method, and its performance requires more research. The separating by geotextiles has the advantages such as absence of chemicals in the separation process, less energy, simple control and implementation. This study presents an environmentally friendly sustainable solution using spacer geotextile layers to absorb crude oil and improve the geotechnical properties of contaminated soil. The variables include contamination percentage, number of fibrous substrate layers, soil overhead load pressure and duration of exposure to contaminated soil. The response variable is the internal friction coefficient of soil obtained from the direct shear test. By comparing soil samples containing geotextiles with samples without geotextiles, it was concluded that spacer geotextile layers could increase the internal friction coefficient of the soil and thus lead to improved soil properties. Increasing the number of geotextile layers, loading and the presence time of geotextile layers in the soil had increased the internal friction angle. But as the oil percentage in the soil increases, the internal friction angle of the soil decreases. Also, in this study, a linear regression model has been used to investigate the effect of existing parameters and the model was in good agreement with the experimental data.
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Shirazi, Mohammad Gharehzadeh, Ahmad Safuan Bin A. Rashid, Ramli Bin Nazir, Azrin Hani Binti Abdul Rashid, Hossein Moayedi, Suksun Horpibulsuk, and Wisanukhorn Samingthong. "Sustainable Soil Bearing Capacity Improvement Using Natural Limited Life Geotextile Reinforcement—A Review." Minerals 10, no. 5 (May 24, 2020): 479. http://dx.doi.org/10.3390/min10050479.
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Geotextiles are commercially made from synthetic fibres and have been used to enhance bearing capacity and to reduce the settlement of weak soil foundations. Several efforts have been made to investigate the possibility of using bio-based geotextiles for addressing environmental issues. This paper attempts to review previous studies on the bearing capacity improvement of soils reinforced with bio-based geotextiles under a vertical static load. The bearing capacity of the unreinforced foundation was used as a reference to illustrate the role of bio-based geotextiles in bearing capacity improvement. The effects of first geotextile depth to footing width ratio (d/B), geotextile spacing to footing width ratio (S/B), geotextile length to footing width ratio (L/B) and the number of reinforcement layers (N) on the bearing capacity were reviewed and presented in this paper. The optimum d/B ratio, which resulted in the maximum ultimate bearing capacity, was found to be in the range of 0.25–0.4. The optimum S/B ratio was in the range of 0.12–0.5. The most suitable L/B ratio, which resulted in better soil performance against vertical pressure, was about 3. Besides, the optimum number of layers providing the maximum bearing capacity was about three This article is useful as a guideline for a practical design and future research on the application of the natural geotextiles to improve the short-term bearing capacity of weak soil foundations in various sustainable geotechnical applications.
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Rose-Harvey, Keisha, Kevin J. McInnes, and James C. Thomas. "Water Flow Through Sand-based Root Zones Atop Geotextiles." HortScience 47, no. 10 (October 2012): 1543–47. http://dx.doi.org/10.21273/hortsci.47.10.1543.
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An alternative to the time-tested gravel drainage layer beneath a sand-based root zone of a sports field or golf putting green can be constructed from a geotextile atop a highly porous drainage material or structure. The geotextile serves to support the root zone mixture on the drainage layer whose pores can be too large for the sand to support itself by bridging. In such an application, the geotextile should have high enough strength and resistance to stretching to support the root zone mixture atop the pores of the drainage layer and should contain internal pores of appropriate size to retain the bulk of particles in the root zone mixture and to allow free passage of drainage water and eluviating fine particles. The objective of this study was to determine whether geotextiles selected to meet these criteria affect the drainage rates of sand-based root zones and whether they affect the size of particles lost from the root zone–geotextile systems. In a 1-year laboratory study that made use of 150-mm diameter polyvinyl chloride (PVC) test cells, measurements of drainage rates and saturated hydraulic conductivities were made on replicated combinations of 10 geotextiles and three 300-mm deep root zone mixtures. Size distributions and total masses of particles that passed from the root zones through the geotextiles were measured. Statistical analyses showed that drainage rate, saturated hydraulic conductivity, and size distribution and mass of eluviated particles were unaffected by the properties of the geotextiles. The results gave of no reason to prohibit the use of geotextiles to support sand-based root zones in golf putting greens or sports fields.
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Fernandes, Januario D. C. "STUDY OF THE STABILITY OF COASTAL RECLAMATION SLOPES BY USING GEOTEXTILES AS SOIL STRENGTH." Neutron 19, no. 1 (July 31, 2019): 64–71. http://dx.doi.org/10.29138/neutron.v19i1.78.
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This study presents a simulation of coastal reclamation deposits with geotextiles in areas with the weakest soil profile. Case studies related to deeds and improvement of slopes with woven geotextiles. Observations and investigations show that the land is sand soil which has a low carrying capacity. Weak soil parametric effects, geotextile webbing, external loads, and earthquake loads were analyzed by PLAXIS. The calculation results show reinforcement with woven geotextiles and against external loads and earthquake loads, having a large safety factor.
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Newman, A. P., E. O. Nnadi, L. J. Duckers, and A. J. Cobley. "Further developments in self-fertilising geotextiles for use in pervious pavements." Water Science and Technology 64, no. 6 (September 1, 2011): 1333–39. http://dx.doi.org/10.2166/wst.2011.180.
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Geotextiles incorporating inorganic nutrients (particularly phosphorous) to enhance the growth of oil degrading microoganisms when geotextiles are used in pervious pavement applications have been shown to be effective in the past. However the cost and manufacturing difficulties have been a barrier to their use. A polypropylene random mat geotextile incorporating an alternative polymer additive as a source of phosphorus has been investigated as a potential self-fertilising geotextile. Experiments are reported which investigate nutrient leach rates, biofilm formation and biodegradation activity.
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Hamzah, Helmi Januar, and Sri Wulandari. "Pengaruh Geotekstil Terhadap Stabilitas Timbunan Jalan." Borneo Engineering : Jurnal Teknik Sipil 1, no. 1 (April 30, 2022): 33–44. http://dx.doi.org/10.35334/be.v1i1.2484.
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Infrastructure development, especially roads are closely related to geotechnical activities. The difference of contours at construction site forces embankment and excavation work. Embankment is an interesting thing to study more deeply because embankments have characteristics such as slopes that have safety factor and must be handled specifically. Geotextiles as an alternative to handling embankment stability are populary used for embankment construction. Many types of geotextile need to calculate and analyze in determining the type of geotextile that are suitable to the characteristics of the subgrade and embankment construction. Embankment stability analysis in this study was calculated using PLAXIS version 8.2 software and Mohr-Coulomb method as basic for calculation. Base on the result of this studie, use of geotextiles, whether woven, non-woven or geogrid, can increase the safety factor and accelerate consolidation time. There will be secondary consolidation consequence of the plastic adjustment of soil grains and geotextiles. The ideal of stress percentage for geotextile to be suitable for use is 56.957% - 37.194%.
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Hamzah, Helmi Januar, and Sri Wulandari. "Pengaruh Geotekstil Terhadap Stabilitas Timbunan Jalan." Borneo Engineering : Jurnal Teknik Sipil 1, no. 1 (April 30, 2022): 33–44. http://dx.doi.org/10.35334/be.v1i1.2484.
Full textAbstract:
Infrastructure development, especially roads are closely related to geotechnical activities. The difference of contours at construction site forces embankment and excavation work. Embankment is an interesting thing to study more deeply because embankments have characteristics such as slopes that have safety factor and must be handled specifically. Geotextiles as an alternative to handling embankment stability are populary used for embankment construction. Many types of geotextile need to calculate and analyze in determining the type of geotextile that are suitable to the characteristics of the subgrade and embankment construction. Embankment stability analysis in this study was calculated using PLAXIS version 8.2 software and Mohr-Coulomb method as basic for calculation. Base on the result of this studie, use of geotextiles, whether woven, non-woven or geogrid, can increase the safety factor and accelerate consolidation time. There will be secondary consolidation consequence of the plastic adjustment of soil grains and geotextiles. The ideal of stress percentage for geotextile to be suitable for use is 56.957% - 37.194%.
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Fleury, Mateus Porto, Lucas Deroide do Nascimento, Clever Aparecido Valentin, Jefferson Lins da Silva, and Marta Pereira da Luz. "Creep Behaviour of Recycled Poly(ethylene) Terephthalate Non-Woven Geotextiles." Polymers 13, no. 5 (February 28, 2021): 752. http://dx.doi.org/10.3390/polym13050752.
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At the beginning of this century, due to well-established Brazilian recycling processes, geosynthetics’ manufacturers started to use recycled poly(ethylene) terephthalate (PET) yarns/filaments (from PET bottles) in geotextile production. Despite the fact that recycled products cannot act as reinforcement functions, geosynthetics are constantly under sustained tensile load and experiences evolutions of the axial strain (creep behaviour). Thus, this study aims to assess the influence of the structure of (needle-punched) non-woven geotextiles manufactured using recycled PET yarns on their creep behaviour. Two geotextiles with different fibre/filament production processes were investigated (short-staple fibres—GTXnwS—and continuous filaments—GTXnwC). Unconfined in-isolated conventional and accelerated (using the stepped isothermal method) creep tests were performed at 5%, 10%, 20%, 40% and 60% of geotextiles’ ultimate tensile strength. The geotextiles investigated provided similar creep behaviour to geotextiles manufactured with virgin PET material. The standard deviation of the axial strain tends to increase as the load level applied increase. The structure of the GTXnwS harms its tensile –strain behaviour, promoting axial deformation under sustained loads, at least 50% higher than GTXnwC for the same load level applied. The influence of the load level and geotextile structure in the initial axial strain is pointed out. Long-term predictions based on creep tests performed using the stepped isothermal method have proven to be conservative and they must be restricted for quality control of the investigated geotextiles.
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Luo, Leike, Jun Guo, Aolong Chen, and Wenhao Wen. "Experimental evaluation of one and two-directional wicking geotextile stabilized permeable base." IOP Conference Series: Earth and Environmental Science 1335, no. 1 (May 1, 2024): 012014. http://dx.doi.org/10.1088/1755-1315/1335/1/012014.
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Abstract Incorporating wicking geotextiles significantly reduces the moisture levels in road bases under saturated and unsaturated conditions, improving the strength of granular materials and reducing water-related pavement damage. Despite the numerous well-documented applications of wicking geotextiles, most practical uses or research predominantly feature wicking fibers oriented in a single direction. Although theoretically incorporating multidirectional wicking fibers should enhance drainage efficiency, empirical studies on the impact of bidirectional fibers on geotextile drainage performance are scarce. A year-long comparative study was conducted in Shenzhen to examine the influence of fiber orientation. In this study, the moisture content in the aggregate base of a permeable sidewalk across three distinct test sections – single-directional, bidirectional, and no wicking geotextile – determined that two-directional wicking geotextiles are superior to their one-directional counterparts in reducing the volumetric water content in the granular base.
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Thamer, Lubna, and Hussein Shaia. "The Effect of Geotextile Layers and Configuration on Soil Bearing Capacity." Mathematical Modelling of Engineering Problems 8, no. 6 (December 22, 2021): 897–904. http://dx.doi.org/10.18280/mmep.080608.
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The term "reinforced soil" refers to a composite material with high tensile-strength components that enhance the soil's tensile strength. One of the most common kinds of geosynthetic fabric utilized for soil reinforcement is geotextiles. This article investigates woven geotextile's potential benefits in enhancing the maximum load-carrying capacity of footings resting upon silty sand soil. The foundation was constructed of a 10 mm thick strong carbon steel plate of 100 mm×100 mm. The factors examined in this research were the first geotextile layer's depth, the geotextile layer's width, the number of layers of reinforcing material, and the vertical spacing between geotextile layers. The impact of geotextile strengthening configurations on the load-carrying capacity of strengthened soil foundations was also studied. The results of the experiments indicated that geotextile reinforced soil could help to grow the soil bearing capacity. The testing findings revealed that the system with three geotextile layers, 0.25B vertical distance among geotextile layers, and a geotextile width of 5B, B denotes the plate's width, achieves the most significant bearing capacity. The test findings also revealed that the reinforcement configuration greatly impacted the reinforced silty sand on the foundation's behavior.
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Adajar, Mary Ann, Miller Cutora, Shayne Jostein Bolima, Kyle Johnson Chua, Irwyn Ainsley Isidro, and John Vincent Ramos. "Strength Performance of Nonwoven Coir Geotextiles as an Alternative Material for Slope Stabilization." Applied Sciences 13, no. 13 (June 27, 2023): 7590. http://dx.doi.org/10.3390/app13137590.
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Slope stability is one of the crucial factors to consider in every civil engineering project. One widely used method to stabilize slope is the use of polymeric products called geosynthetics. Natural fiber geosynthetics used for geotechnical applications have attracted attention because of their environmental and economic benefits. Coir fibers made into nonwoven geotextiles are utilized in this study as an alternative material for slope stabilization. One drawback of coir fiber geotextiles is their low tensile strength and limited life span due to their susceptibility to environmental factors. This study was conducted to evaluate the effect of mercerization and bleaching treatment on the strength performance of nonwoven coir geotextiles after exposure to conditions simulating biological and chemical degradation. Microscopic images of treated coir geotextiles show the removal of surface impurities that altered the physical components in the fiber. The grab tensile strength results prove that the mercerized coir geotextiles are suitable for field conditions and groundwater exposure. The untreated coir geotextiles showed superior puncture resistance relative to the chemically treated geotextiles. The chemical treatments improved the tensile strength; however, they weakened the puncture resistance of the coir geotextile due to the decrease in thickness. A slope stability simulation conducted using Rocscience Slide2 version 9.017 software proved that coir geotextiles can effectively reinforce slopes, with strength performance almost comparable to that of synthetic geotextiles.
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Z Lubis, Mhd Khuzeir, and Kamaluddin Lubis. "Evaluasi Perbaikan Tanah Menggunakan Geotekstil Untuk Meningkatkan Stabilitas Tanah Lapisan Subgrade Pekerjaan Jalan." JOURNAL OF CIVIL ENGINEERING, BUILDING AND TRANSPORTATION 3, no. 2 (September 10, 2019): 71. http://dx.doi.org/10.31289/jcebt.v3i2.2702.
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<em>At the stage of a construction work one of the main problems in soft soil is the large land decline. The large decrease is due to the decrease in soil. The condition of poor base soil in the form of clay soil needs to be done to improve the basic soil to be able to support the construction load. One method used as land improvement is by geotextiles. The type of geotextile used in the construction of the Medan-Kualanamu-Tebing Tinggi toll road project, Parbarakan-Lubuk Pakam Sta.42 + 750-Sta.47 + 600 is a geotextile PP woven polypropylene. The geotextile type uses non woven geotextile while the study is geotextile polypropylene woven, Non woven tensile strength 20 kN / m required 1 layer of geotextile while tensile strength Polypropylene woven 30 kN / m required 2 layers of geotextile. From these calculations can be concluded that the use of geotextiles can be used as one of the repair and retrofitting.</em>
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Liu, Lanjun, Haiku Zhang, Jinhuan Zhu, Shixin Lv, and Lulu Liu. "Evaluation of the Tensile and Puncture Properties of Geotextiles Influenced by Soil Moisture under Freezing Conditions." Materials 17, no. 2 (January 11, 2024): 376. http://dx.doi.org/10.3390/ma17020376.
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Freezing conditions under different humidity will influence the mechanical properties of geotextiles, leading to the gradual fracture of geotextiles. It brings hidden danger to the whole isolation, reinforcement and protection of rock and soil. It is particularly important to study the tensile and puncture properties of geotextiles considering low temperature and moisture content. In this paper, a series of tensile and puncture tests of geotextiles are performed under different low temperatures (0, −3, −6, −9, and −12 °C) and at different moisture content levels (0, 5, 10, 30, 50, and 80%). From the microscopic perspective, the failure mechanism considering the low temperature and moisture content was explained comprehensively. Experimental results indicate that with a decrease in freezing temperature, the tensile strength of geotextiles increases as a parabolic function while the elongation at failure decreases as an exponential function. Additionally, the puncture strength of geotextiles presented a parabolic increase with the decreasing temperature. Under the freezing temperature environment, the higher moisture content of geotextiles can generate a higher puncture strength increment. This research contributes to a more comprehensive understanding of the tensile and puncture properties of geotextile materials considering low temperature and moisture content. It can provide important guidance for the design of slopes, the reinforcement of earthen dams, and roadbed reinforcement with geotextiles in cold regions.
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Lee, K. M., and V. R. Manjunath. "Soil-geotextile interface friction by direct shear tests." Canadian Geotechnical Journal 37, no. 1 (February 1, 2000): 238–52. http://dx.doi.org/10.1139/t99-124.
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This paper describes large-size direct shear tests on soil-geotextile interfaces. Medium-grained, uniform sand and three varieties of woven and nonwoven geotextiles manufactured with different techniques are utilized to investigate the soil-geotextile interface friction coefficient (f*). Tests were carried out using an apparatus specifically designed for interface testing, and results were compared with those obtained from the conventional direct shear equipment. The results obtained from this study indicated that the determination of peak interface behaviour was not a trivial matter, as the results were significantly affected by the boundary and testing conditions of the testing apparatus. The residual interface behaviour was investigated by multiple reversal direct shear tests. Since the use of multiple reversal direct shear tests on the proposed apparatus can impose a high degree of shear displacement and stress uniformity on the soil-geotextile interface, a more reliable definition of the residual interface friction can be obtained. The results indicate that woven-nonwoven geotextile interfaces exhibit a significant postpeak strength loss after a number of shear cycles. In the case of woven geotextiles, this is attributed to the opening up of the filaments associated with the physical damage caused during shear, whereas for nonwoven geotextiles it is due to the pulling out or tearing of filaments.Key words: geotextile, direct shear test, interface friction coefficient, peak shear strength, residual shear strength.
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Kusumawardani, Yustika, and Widi Astuti. "EFEKTIFITAS PENAMBAHAN MEDIA GEOTEKSTIL PADA SARINGAN PASIR LAMBAT TERHADAP PENYISIHAN PARAMETER KEKERUHAN, JUMLAH COLI DAN COD." Jurnal Teknosains 8, no. 2 (January 31, 2019): 114. http://dx.doi.org/10.22146/teknosains.31917.
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Slow sand filter processing is done by separating raw contaminant water which is passed slowly on sand. Fluctuating raw water quality resulted in the schmutzdecke layer not growing optimally. Therefore, it is needed media that help the performance of the sand filter. One of the media used is geotextile. The geotextile is useful as a medium to optimize the growth of microorganisms in the schmutzdecke layer. Geotextiles have similar surface structures such as sand filters as well as their pores. The purpose of this study was to determine the effectiveness of adding geotextiles in reducing turbidity parameters, number of coli and COD. This study used slow sand filter reactor with a continuous flow system of 0.3 m3 / m2.jam for 7 days. Based on the research, the addition of geotextile media is quite effective and can improve the performance of slow sand filter. Percentage of turbidity removal reached 94.27%, coli 99.40% and COD 92.85%. COD values tend to be dynamic as raw water conditions. Geotextiles is quite helpful in growing a layer of schmutzdecke because the structure resembles sand so as to increase the number of bacteria bed filters.
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Dickinson, S., and R. W. I. Brachman. "Assessment of alternative protection layers for a geomembrane – geosynthetic clay liner (GM–GCL) composite liner." Canadian Geotechnical Journal 45, no. 11 (November 2008): 1594–610. http://dx.doi.org/10.1139/t08-081.
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A protection layer is required above geomembrane (GM) – geosynthetic clay liner (GCL) landfill liners to limit physical damage (GM strains and GCL thinning) from an overlying granular drainage layer. A 150 mm thick layer of sand has been found to provide excellent protection at a vertical pressure of 250 kPa. However, the use of sand may not be practical in many cases. Experimental results are presented where the effectiveness of alternate protection systems above one particular GM–GCL liner were examined with 50 mm coarse gravel at an applied vertical pressure of 250 kPa. A 150 mm thick layer of compacted clay and a 150 mm thick layer of rubber tire shreds with a nonwoven needle-punched geotextile (570 g/m2) were found to limit the geomembrane strains and GCL extrusion to acceptable levels. Layered geotextiles performed much better than single layers of geotextiles. A layered geocomposite, with a thick nonwoven needle-punched geotextile in the middle to provide cushioning and stiffer woven geotextiles on the top and bottom to carry tensile force, was able to limit the short term strain to less than 3%, but it was not able to prevent local thinning of the GCL because of the deformation required to mobilize force in the geotextiles.
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Ullah, Saad, Burak F. Tanyu, Erol F. Guler, Edward J. Hoppe, and Emre Akmaz. "Evaluation of the Long-Term Performance of Woven Geotextile Used between Base Course and Subgrade of a Paved Road." Transportation Research Record: Journal of the Transportation Research Board 2673, no. 8 (April 25, 2019): 310–21. http://dx.doi.org/10.1177/0361198119827567.
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The purpose of this research was to investigate the properties of the exhumed geotextile from a low-volume road on the Virginia Department of Transportation network. The exhumed geotextiles have been in service for 23 years, which provided an opportunity to evaluate the longevity of the materials as well as to make assessments of how it relates to the changes in material properties. During this investigation, subgrade and base course materials were also obtained from the same site and an experimental program was developed to evaluate the effectiveness of the exhumed geotextiles for separation, stabilization, and filtration for the base course thicknesses of 4, 6, and 8 in. The results from this study combined with the results from the previous studies conducted at the same site showed that when the geotextile is placed between the subgrade and base course, the thinner the pavement section, the more evident the effectiveness of the geotextile improvements. One important finding of this research was that the placement of a geotextile reduced the particle breakage caused by abrasion under the applied transient loads. This was observed as a stabilization effect of the geotextile inclusion. As a general conclusion, for low-volume roads with relatively thin pavement sections, properly selected geotextiles provide benefits for separating the subgrade and base course (minimizing pumping), filtering infiltrated or ground water, and stabilizing the road profile. These benefits become more apparent when the thickness of the base course is less than 8 in.
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Lin, Jia Horng, Jing Chzi Hsieh, Jia Hsun Li, Wen Hao Hsing, and Ching Wen Lou. "Effects of Needle-Punch Depth on Properties of PET/LPET/Kevlar Nonwoven Geotextiles." Advanced Materials Research 910 (March 2014): 266–69. http://dx.doi.org/10.4028/www.scientific.net/amr.910.266.
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Geotextile has been commonly used in civil and geotechnical engineering applications, and the majority of geotextiles is made of nonwoven fabrics. Therefore, this study combines crimped polyester (PET) fibers, recycled Kevlar unidirectional selvage fibers, and low-melting-point PET (LPET) fibers to form PET/Kevlar/LPET nonwoven geotextiles, and then examines how various neelde-punch depths influence mechanical properties of the resulting nonwoven geotextiles. The tensile strength, tearing strength, bursting strength, and static puncture resistance of the nonwoven fabrics increase as a result of an increase of 0.3 cm to 0.5 cm in needle-punch depth. However, an increase of 0.5 cm to 0.7 cm causes a slight decrease in all aforementioned properties.
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Adachi, Vitor Yudi Góes, Joan Steven Flores Rodríguez, Mariana Ferreira Benessiuti Motta, Gabriel Orquizas Mattielo Pedroso, Luis Rogerio de Oliveira Hein, and Emerson Felipe Félix. "Sediment Barriers’ Performance in the Laboratory: Evaluation of Clogging and Filtration Characteristics in Geotextiles Subjected to Discharge Cycles." Water 16, no. 1 (December 27, 2023): 107. http://dx.doi.org/10.3390/w16010107.
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This research aims to assess the clogging process of geotextiles within silt fences. For that purpose, the filtering efficiency, flow rate, and clogging of three geotextiles (GTX-1, GTX-2, and GTX-3) employing two distinct soils and under three sediment discharge cycles were investigated. The analysis adhered to the American standard D5141-11 and, as further analyses, qualitative and quantitative inspections were conducted through microscopic images of the materials. The results showed greater clogging of the nonwoven geotextile, GTX-1, with higher retention efficiency (approximately 100%) and better turbidity removal for both soils, equal to a reduction of around 94%. For GTX-2, a woven geotextile with a larger pore opening, less intense clogging and lower retention efficiency were observed after the third discharge; the average was 96% for both soils. GTX-3, a woven geotextile with a smaller apparent opening, exhibited a behavior similar to GTX-1: as the number of cycles increased, the material experienced more clogging and higher retention efficiency for soil 1 (approximately 98.5%). Based on these findings, it can be inferred that the discharge cycles impact the tested geotextiles in diverse ways and, therefore, the selection of the material should be contingent on project requirements.
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Alkaissi, Zainab Ahmed. "ANALYSIS OF GEOTEXTILE EMBANKMENT BY ANSYS." Journal of Engineering 17, no. 1 (January 1, 2011): 12–26. http://dx.doi.org/10.31026/j.eng.2011.01.02.
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The major objectives of this research are to analyze the behavior of road embankmentsreinforced with geotextiles constructed on soft soil and describe the finite element analysis by usingANSYS program ver. (5.4). The ANSYS finite element program helps in analyzing the stability ofgeo- structure (embankment) in varied application of geotextiles reinforcement to enhance the bestdesign for embankment.The results of analysis indicate that one of the primary function of geotextiles reinforcement was toreduce the horizontal displacement significantly. With the inclusions of reinforcement, the horizontaldisplacement reduced by about (81%), while the vertical displacement reduced by (32%). The effectof geotextiles stiffness modulus on horizontal and displacement is quite significant even a very highmodulus of geotextile will have relatively little effect on vertical displacement. Also it is observedfrom the obtained results that the maximum displacement occurred at the toe of embankment for bothhorizontal and vertical movement, then decrease gradually to a negligible value for the layerreinforced case. Also the reinforcement reduces the shear stress developed in the foundation soil.
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Adeleke, Daniel, Denis Kalumba, and Johnny Oriokot. "Asperities effect on polypropylene & polyester geotextile-geomembrane interface shear behaviour." E3S Web of Conferences 92 (2019): 13017. http://dx.doi.org/10.1051/e3sconf/20199213017.
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The summary of this paper is focused on the result of a study that used quantitative measures of surface texture as the basis for examining the effects of asperities on the shear characteristics of geotextile-geomembrane interfaces. About 30 large direct shear tests were conducted to evaluate the geotextile-geomembrane interface shear strength properties. The results indicated a non-linear failure envelopes and strain softening behaviour at a normal stress range of 50 – 400 kPa. For most interface tested, the polyester-geotextiles resulted in higher shear strength as compared with polypropylene-geotextiles. Also, the polyester and polypropylene geotextile interface with the high asperity geomembrane produces a similar percentage increase in friction angle at the residual state. For textured geomembranes interfaced with both geotextile, polyester geotextile exhibited relatively less time before failure. Also, asperity height has a more pronounced effect than asperity density on the residual interface shear strength. The outcome of this study would provide a recommendation and guide that can lead to an improved basis for geosynthetics selection in various engineering application.
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Padmaja, Sreeteja Bala. "Study of Clayey Soils with Nonwoven Geotextiles as Liners in Landfill Stabilization." International Journal for Research in Applied Science and Engineering Technology 9, no. VI (June 20, 2021): 1239–41. http://dx.doi.org/10.22214/ijraset.2021.35246.
Full textAbstract:
Landfills are highly complex, well-engineered series of cells in or above the ground level. Soil stabilization is the alteration of soils to enhance their physical properties. Landfill stabilization increase the shear strength of soil thus improving the load bearing capacity. Geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect or drain. All have a wide range of applications and are currently used to advantage in many civil engineering applications including roads, airfields, railroads, embankments, retaining structures, reservoirs, canals, dams, bank protection and coastal engineering. Typically made from polyester, they are classified into woven, needle punched, heat bonded. nonwoven geotextiles are manufactured by bonding materials together made of synthetics and used in separation applications. Non-woven geotextiles have more gaps of plastic membrane and right choice where pooling water is major concern i.e. drainage systems. In this present study, different geotextiles gives varying advantages. The permeability of the soil can be reduced to desired coefficient and also increased based on the type of geotextile used. The angle of shearing resistance (angle of internal friction) would be lower than that of the unreinforced soils. The performance of the geotextiles depends upon the index properties of the soil.
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Raymond, Gerald P. "Performance assessment of a railway turnout geotextile." Canadian Geotechnical Journal 23, no. 4 (November 1, 1986): 472–80. http://dx.doi.org/10.1139/t86-077.
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Many railways have been making increasing use of the heavier mass per unit area geotextiles, bringing into question the financial viability of their use. In order to assess the viability of turnout geotextiles, two closely spaced turnouts, positioned on an embankment constructed of compacted clay at Rosser, near Winnipeg, were rehabilitated in September 1981. Under one turnout, a Turn Out Pack System (TOPS) geotextile of variable mass per unit area (550–1100 g/m2 (16–32 oz/yd2)) was used; with the other, no geotextile was used. The ballast was a metamorphic granodioritic gneiss known locally as Kenora granite. This article summarizes the findings of excavations made to assess the performance of the geotextile. The assessment excavations were made in August 1984 after an average of 13.6 × 106 gross tonnes (15 × 106 gross tons) per year per track of traffic. The results clearly show the damage penalty to the ballast from fouling caused at the nongeotextile locations. Key words: railways, ballast, subballast, geotextile, fouling, pumping, fines, equivalent opening size (EOS).
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Jamshidi, Jamshid. "Optimization of Production Parameters of Geotextiles Used for Shoreline Protection." Research Journal of Textile and Apparel 19, no. 2 (May 1, 2015): 9–15. http://dx.doi.org/10.1108/rjta-19-02-2015-b002.
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The use of geotextile sand containers (GSCs) in shoreline protection systems has moderately grown since the first applications in the 1970s and increasingly used as an alternative to natural stone, slag, and concrete. Due to their economical, technical and ecological advantages, the use of geotextiles and geocomposites for filter and drainage functions is increasing worldwide and has a 40 year history already. For coastal protection measures, nonwovens are proven to have long-term resistance against ultraviolet radiation and saltwater. High elongation behavior provides superior properties during loading in coastal protection means, which is determined as being the biggest risk for damaging geotextiles. Such applications require certain functional characteristics in the geotextiles, besides their basic properties, which are required to be engineered by the judicious optimization of the needlepunching process. In this study, the effect of the process parameters including punch density and depth of needle penetration has been investigated on the mechanical (tensile strengths in the machine and cross-machine directions) properties of needlepunched nonwoven geotextiles. These process parameters are then empirically related to the fabric properties by using a multiple regression technique.
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Lesičar, Ana, Boris Kavur, Edin Serdarević, and Ratko Savi. "Testing of tensile properties of two nonwoven geotextiles." Environmental engineering 10, no. 1-2 (January 31, 2024): 12–18. http://dx.doi.org/10.37023/ee.10.1-2.2.
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The use of geosynthetics has become a common and unavoidable practice in geotechnical engineering, agriculture and environmental engineering. The main disadvantages of earthen construction materials are their insufficient tensile strength and inadequate water permeability or impermeability, depending on the problem to be solved. Such shortcomings are successfully solved by incorporating appropriate geosynthetics (geotextile, geogrid, geocells, geomembrane etc.) into earthen structures. The most used geosynthetic is geotextile, which can provide practically all functions expected from such a product. The aim of this paper was to present and analyse the relative results of multiple tensile tests performed on two nonwoven (NW) geotextiles to provide a realistic insight into the variability of their tensile properties. The obtained results showed a very similar variability of the tensile properties of the tested geotextiles.
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Fannin, R. J., Y. P. Vaid, and Y. C. Shi. "Filtration behaviour of nonwoven geotextiles." Canadian Geotechnical Journal 31, no. 4 (August 1, 1994): 555–63. http://dx.doi.org/10.1139/t94-064.
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Criteria for soil retention and permeability are important in the proper selection of a geotextile in filtration design. Gradient-ratio tests have been performed to assess the compatibility of nonwoven geotextiles with soils exhibiting a range of gradations. Observations of any soil piping through a geotextile were used to evaluate soil-retention criteria. The American Society for Testing and Materials test apparatus includes additional ports that were used to define a modified gradient ratio, which is a better indicator of flow condition. Measurements of the distribution of water head through the soil sample and geotextile specimen, and its variation with imposed hydraulic gradient and time, are used to establish the permeability of the soil and soil–geotextile composite. The composite layer is relatively thin. A unified interpretation of the results is presented that shows a gradient ratio greater than one means the permeability of the composite is less than that of the protected soil: the condition is acceptable if it can be demonstrated that no impediment of seepage flow will result. Key words : filtration, geotextile, soil retention, gradient ratio, permeability.
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Ponny, Sri, Jonie Tanijaya, and Suryanti Rapang Tonapa. "Bending Behavior of Concrete Beams Using Geotextiles in Tensile Areas." Paulus Civil Engineering Journal 3, no. 3 (October 10, 2021): 412–20. http://dx.doi.org/10.52722/pcej.v3i3.293.
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Geotextile is made of permeable geosynthetic. Geotextile s are formed from synthetic fibers based on polymers that have high mechanical properties in tensile strength, trapezoidal tearing strength, and puncture resistance. Therefore, researchers want to increase the use of Geotextile as an added material in the tensile area of concrete blocks. The test objects used are 9 pieces of 150mm×150mm×600mm beams. The results of the research were that the addition of woven Geotextile s and non-woven Geotextile s on concrete blocks increased, for woven Geotextile s by 21.593% of beams without using Geotextile s and non-woven Geotextile s of 17.058% of beams without using Geotextile s. So the use of Geotextile s on concrete blocks can improve quality because the value of the flexural strength of beams using Geotextile s is greater than beams without using Geotextiles.
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Laasri, Laila, and Hafida Naim. "Evaluation of Environmental Impact of Palm-Fiber Based Geotextile Using a Life Cycle Method." Key Engineering Materials 925 (July 11, 2022): 9–16. http://dx.doi.org/10.4028/p-s4qw4k.
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Currently, the geotextile industry is dominated by petroleum-based products, and the market share of bio-based geotextiles is still very low. With climatic and more generally environmental issues, combined with the scarcity of petroleum resources, the use of bio-based products appears to be an avenue of choice to explore. Through this study, we intend to raise the environmental benefits of a natural geotextile woven from fibers extracted from the leaves of the dwarf palm plant, an abundant renewable resource in Morocco and Mediterranean basin. We used the life cycle assessment analysis from cradle to factory gate following the requirements of ISO 14040 and ISO 14044 standards. Our main objective is to provide an environmental profile for this natural geotextile to encourage its use in soil protection and to stimulate therefore the local economy. The LCA analysis results showed that the transportation phase is the main contributor to almost every environmental impact category. We also noticed that no environmental impact was identified for the raw material supply phase which is characterized by a traditional harvest of raw palm leaves from the palm plant that grows spontaneously in eco-friendly environment. A comparison with two examples of petroleum-based geotextiles available in the market shows that palm-fiber-based geotextile presented the lower impacts in all the categories, except for eutrophication and ozone layer depletion potentials, its carbon footprint is relatively low and can save an average of 0.84 Kg CO2 eq. per surface unit (1 m2), nevertheless, its water consumption exceeds that recorded for synthetic geotextiles. Finally, palm-fiber geotextile can compete with the synthetic ones used in soil erosion, it is designed from renewable resource, naturally biodegradable, requires little energy for its production, and contribute to the reduction of greenhouse gas emissions.
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García-Casuso, Carmen, Pablo Lapeña-Mañero, Elena Blanco-Fernández, Ángel Vega-Zamanillo, and José Miguel Montenegro-Cooper. "Laboratory Assessment of Water Permeability Loss of Geotextiles Due to Their Installation in Pervious Pavements." Water 12, no. 5 (May 21, 2020): 1473. http://dx.doi.org/10.3390/w12051473.
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During the last decades, the importance of sustainable development in society has increased considerably. Sustainable Urban Drainage Systems (SUDS) are a group of techniques that aim to improve the management of rain and run-off water while reducing their pollution. Many of these systems incorporate geotextiles in their structures, which act as a layer separation and water filter. Some authors defend the idea that by simply being installed, geotextiles partially or totally lose their separation and filtering capacities. This study proposes a testing methodology that can reproduce this effect and obtain a reduction factor for the water permeability of the material after its installation, which is defined here as the ‘new condition factor’. The procedure simulated the real installation conditions in the laboratory by causing the specimen to undergo both mechanical and hydraulic damage and subsequently measuring the loss of water permeability that it provoked on the geotextile. Two different nonwoven geotextiles were tested in order to validate the procedure and to obtain initial results that could confirm the need for the new condition factor in the design of pervious pavements with geotextiles. Analysis of variance (ANOVA) was used to determine the statistical significance of the test variables.
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Mendonca, Marcos Barreto de, Maurício Ehrlich, and Magali Christe Cammarota. "Conditioning factors of iron ochre biofilm formation on geotextile filters." Canadian Geotechnical Journal 40, no. 6 (December 1, 2003): 1225–34. http://dx.doi.org/10.1139/t03-064.
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This paper presents a study of ochre formation on geotextile filters. Ochre is a substance found sticking to solid surfaces of drainage systems and may cause clogging. Ochre formation is discussed based on the new concepts of biofilm development. Ochre formation is the result of microbial colonization and its affinity to iron compounds naturally found in seepage water. The aerobicnonaerobic interface in drainage systems is a very favourable locale for optimum development of iron bacteria. Laboratory studies were done to verify the influence of intrinsic characteristics of the geotextiles and environment on ochre formation. Because flow condition was not considered in the tests, however, these results may not represent real field performance of geotextile filters. Tests of biofilm formation were conducted in Erlenmeyer flasks containing culture mediums for iron bacteria and geotextile samples. Nonwoven polyester, nonwoven polypropylene, and woven polypropylene geotextiles were used in the tests. The study was performed considering different levels of iron concentration, available dissolved oxygen, and pH. Laboratory tests have shown the fundamental importance of iron bacteria activity, type of geotextile, and environmental conditions on ochre formation.Key words: ochre, clogging, filtration, biofilm, geosynthetics.
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Guimarães, Mag Geisielly Alves, Pedro Victor Garcia de Oliveira, Denise de Carvalho Urashima, Eleonardo Lucas Pereira, and Beatriz Mydori Carvalho Urashima. "Cyclic Fatigue Durability of Woven Geotextiles for Use in Sustainable Waste-Dewatering Systems." Sustainability 15, no. 18 (September 15, 2023): 13807. http://dx.doi.org/10.3390/su151813807.
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Geosynthetics are increasingly used in geotechnical engineering to replace conventional solutions due to their cost-effective and environmental benefits. For example, geotextiles can be used in sustainable waste-dewatering systems to confine solid waste for final disposal. This study is presented to analyze the durability of a geotextile regarding cyclic fatigue induced during the pumping stages in these sustainable waste-dewatering systems. A polypropylene woven geotextile was used and subjected to cyclic tensile loading levels of 10%, 30% and 50% of the ultimate average tensile strength. We also used hysteresis loops with a frequency of 0.1 Hz at different numbers of cycles (10, 20, 30, and 90 cycles). With a 95% confidence level and response surface, the results show that increasing the tensile loading levels and the number of cycles made the geotextile lose its tensile strength. Laboratory experiments simulated scenarios where the geotextile was subjected to cyclic fatigue that might directly impact its strength–strain and hysteretic stiffness performance over its design lifetime. This study contributes to a better understanding of the durability of geotextiles to subsidize decision-making involving social, environmental, and technical impacts in waste-dewatering system applications.
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Murti, Angga Wisnu, Henny Pratiwi Adi, and M. Faiqun Niam. "ANALISIS PERBANDINGAN ALTERNATIF PERKUATAN STABILITAS LERENG PADA REST AREA JALAN TOL SEMARANG – SOLO (Studi Kasus Rest Area Km. 456)." Rang Teknik Journal 6, no. 2 (May 18, 2023): 231–41. http://dx.doi.org/10.31869/rtj.v6i2.4207.
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Soil/slope stabilization is a method used to increase the bearing capacity of a soil layer by giving special treatment to the soil layer. This study aims to determine the criteria for selecting the type of reinforcement, the advantages and disadvantages of geotextile woven reinforcement, gabions and geoframes, as well as to determine the priority order of slope reinforcement based on existing criteria in the construction work of the Semarang - Solo km toll road rest area. 456. The data in the study were obtained through a questionnaire with the respondents of this study consisting of 10 people who came from the job owner, job executor and work supervisory consultant. To choose slope stability reinforcement there are 5 criteria, namely cost, implementation time, labor, availability of materials and functions. The type of reinforcement used there are 3 alternatives including woven geotextiles, gabions and geoframes. Data analysis using AHP (Analitycal Hierarchy Process) method, data processing using Expert Choice software. The results of this study indicate that the woven geotextile reinforcement function criteria are superior with a weight of 0.375. Then from the criteria for the implementation of superior woven geotextile reinforcement with a weight of 0.587. Woven geotextiles are also superior in terms of labor and material availability with weights of 0.510 and 0.586, respectively. Meanwhile, in the criteria of superior gabion reinforcement function with a weight of 0.456. Woven geotextile reinforcement is the first priority based on the above criteria with a weight of 0.41,the priority of selecting the second reinforcement using gabions with a weight of 0.341 and strengthening using a geoframe is on the third priority with a weight of 0.248. While the realization in the field the use of woven geotextiles and geoframes is the most widely used compared to using gabions.
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Rios-Soberanis, C. R., R. Rodriguez-Laviada, and E. Perez-Pacheco. "Artificial Weathering Analysis and Mechanical Behavior of Geotextiles Used for Coast Erosion Control and Beach Restoration." Advanced Materials Research 1101 (April 2015): 361–67. http://dx.doi.org/10.4028/www.scientific.net/amr.1101.361.
Full textAbstract:
Nowadays geotextiles play a significant part in coastal protection and erosion prevention design and maintenance techniques. The growth in their use worldwide as geotubes for recovering damaged coastal due to its easiness of manipulation and excellent mechanical properties has been extraordinary. Considering that applications of geosynthetics are usually outdoors, the degradation of polymers must be taken in account when selecting polymeric textiles. There are many environmental factors, which influence aging mechanisms of geotextiles such as UV radiation, temperature, humidity, etc. However, a multiple exposures, such as a combination of moisture and heat or oxygen and light, can result in accelerated deterioration. This paper is related to mechanical behavior and durability consideration that geotextiles must withstand in order to be applied as geotubes for coast erosion and beach regaining. The paper provides an overview of the current erosion in the Yucatan coast and the solutions for shoreline protection as well as the effect of geotextile architecture on mechanical properties.
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Eko Budianto, Dina Limbong Pamuttu, Hairulla Hairulla, and Daud Andang Pasalli. "Geotextile Reinforcement Model Laboratory Test on Silt Soil." Technium: Romanian Journal of Applied Sciences and Technology 17 (November 1, 2023): 46–51. http://dx.doi.org/10.47577/technium.v17i.10045.
Full textAbstract:
Merauke Regency is a lowland area that has soft soil which predominates. One of the methods to overcome the subsidence in silt soil, it is necessary to strengthen it by using geotextiles. The function of the geotextile is to hold the soil surface so that there is no subsidence in the soil. This study aims to determine the carrying capacity of silt soil before and after being given geotextile reinforcement.The study used an experimental method using the addition of Geotextile (non-woven type TS600) to strengthen the carrying capacity of silt soil. The silt soil carrying capacity test was divided into several variations, namely without using geotextile reinforcement and reinforced with 1 layer, 2 layers, and 3 layers of geotextile at a depth of 10 cm, 20 cm and 30 cm.The results of research conducted in the laboratory, the use of geotextile materials to increase the carrying capacity of silt soil has increased compared to the initial conditions. Soil without using geotextiles has a greater decrease, namely at a load of 5 kN there is a settlement of 20.3 mm. By using a single layer geotextile reinforcement material at a load of 5 kN there was a decrease of 10.97 mm, while using a two layer geotextile reinforcement material at a load of 5 kN there was a decrease of 8.09 mm, and using a three layer geotextile reinforcement material with a load of 5 kN there was a decrease of 6.01 mm. It can be concluded that the use of geotextile reinforcement can reduce the settlement of silt soil.
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Xie, Yida, Feiteng Wang, Chunhai Xu, Xiaoying Yue, and Shujing Yang. "Applying Artificial Cover to Reduce Melting in Dagu Glacier in the Eastern Qinghai-Tibetan Plateau." Remote Sensing 15, no. 7 (March 24, 2023): 1755. http://dx.doi.org/10.3390/rs15071755.
Full textAbstract:
Global warming has accelerated during the past decades, causing a dramatic shrinking of glaciers across the globe. So far, the attempts to counterbalance glacial melt have proven to be inadequate and are mostly limited to a few glacial landscapes only. In the present study, a scientific glacier protection experiment was conducted at the Dagu Glacier site. Specifically, the study site was the Dagu Glacier No. 17, situated 4830 m a.s.l. The study involved a deliberate verification of the feasibility and effectiveness of using geotextile covers on small glaciers located at high altitudes between August 2020 and October 2021. The observations revealed that the mass loss in the area covered with geotextiles was, on average, 15% lower (per year) compared to that in the uncovered areas combining field campaigns, terrestrial laser scanning, and unmanned aerial vehicle. The reason for this could be that the albedo of the geotextile is higher than that of the glacier surface. In addition, the aging of geotextiles causes a decline in their albedo, leading to a gradual decline in the effectiveness of the resulting glacier protection. It was indicated that geotextiles could be effective in facilitating the mitigation of glacier ablation, although the cost-related limitations render it difficult to upscale the use of artificial cover. Nonetheless, using active artificial cover could be effective in the case of small glaciers, glacier landscapes, and glacier terminus regions.
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Henry, Karen S., and Robert D. Holtz. "Geocomposite capillary barriers to reduce frost heave in soils." Canadian Geotechnical Journal 38, no. 4 (August 1, 2001): 678–94. http://dx.doi.org/10.1139/t01-010.
Full textAbstract:
We investigated the potential for geosynthetic capillary barriers to reduce frost heave in soils by freezing upright, cylindrical soil specimens with horizontal disks of geosynthetics placed in them. During freezing, water was freely available at 25 mm above the base of 150 mm high specimens. The geosynthetics were located 5 mm above the water supply. We measured frost heave and final water content profiles of specimens containing geosynthetic capillary barriers and control specimens. The thermal conditions of the tests were typical of pavements in cold regions. Geotextiles prepared to simulate field conditions (i.e., moistened and containing soil fines) failed to significantly reduce frost heave. However, geocomposites comprising needle-punched polypropylene geotextiles sandwiching a drainage net, prepared in the same way as the moistened geotextiles containing soil fines, reduced frost heave when the soil water suction head in the overlying soil was 1800 mm or more. The geocomposites did not significantly reduce heave when the soil water suction head in the overlying soil was 800 mm or less. This is probably due to water migration between the two layers of soil, through the geotextiles and along the net of the geocomposite.Key words: capillary barrier, frost heave, geosynthetic, geotextile, geocomposite, soil freezing.
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Ridho, Muhammad, Yosef Cahyo Setianto Poernomo, Agata Iwan Candra, and Fajar Romadhon. "Meningkatkan Kualitas Pelayanan Jalan Raya Plandaan – Boro Tulungagung Menggunakan Perkerasan Kombinasi Geotextile." Jurnal Manajemen Teknologi & Teknik Sipil 4, no. 2 (October 31, 2021): 144. http://dx.doi.org/10.30737/jurmateks.v4i2.2057.
Full textAbstract:
Roads as a means of transportation have an essential role in supporting human activities. One of the developments in road construction is the application of geotextiles in road combination pavements. Geotextile itself is often found in construction planning, especially in soil stabilization. The plandaan – boro Tulungagung road section is indicated by the type of silt as deep as 1.2 meters so that improvements are needed to support the quality of road construction. The purpose of this research is to plan road pavement with geotextiles on the Plandaan to boro roads. The geotextile used is a woven geogrid geotextile. The method used in planning is the Bina marga method of the 2017 Road Pavement Design Manual. The data used include technical data, traffic data, and California Bearing Ratio (CBR). The planning includes traffic design, pavement thickness calculations, and volume calculations. The planning results will be HMA – WC pavement covering an area of 4,200 m, with K225 concrete pavement covering an area of 8,400 m. Class Bﬞ Aggregate Pavement covering an area of 10,500 m using a geotextile layer requires 51,000 m² so that these results can be used as a reference in the repair or improvement of the Plandaan - boro Tulungagung road.