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Artículos de revistas sobre el tema "Slurry wall"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 1 de febrero de 2022

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1

Das, Prabir K., Anthony L. Ricci, Huang Ni y Paul Harrington. "Use of Soldier Pile–Tremie Concrete Slurry Walls as Permanent Tunnel Walls". Transportation Research Record: Journal of the Transportation Research Board 1541, n.º 1 (enero de 1996): 153–62. http://dx.doi.org/10.1177/0361198196154100120.

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The analysis and design of soldier pile–tremie concrete (SPTC) slurry walls for the Massachusetts Highway Department's (MHD) Central Artery/Tunnel (CA/T) Project in downtown Boston are discussed. Unlike most slurry walls, which are used as temporary support for excavation during construction, these SPTC walls are designed also as the permanent wall system for the tunnels. The CA/T includes more than 6.1 km (20,000 ft) of slurry walls. Most of the walls are designed and are to be constructed as SPTC walls. Steel wide-flange soldier piles are installed at 1.21- to 1.83-m (4- to 6-ft) spacings in a slurry trench, and the tremie concrete is placed to form the concrete wall. The steel wide-flange piles form the primary support system for the wall. In most of the locations, the concrete is designed to act as “lagging” spanning between the structural steel members. The concrete base slab is rigidly connected to the SPTC walls, and the composite roof is pin-connected to the walls to form the tunnel. The following topics are discussed after an introduction to the project: geotechnical conditions, design concept of the SPTC slurry walls, design consideration, underpinning of the existing Central Artery, and low head-room construction.

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2

Lei, Mingfeng, Linghui Liu, Yuexiang Lin, Chenghua Shi, Weichao Yang, Chengyong Cao y Yao Liu. "Research Progress on Stability of Slurry Wall Trench of Underground Diaphragm Wall and Design Method of Slurry Unit Weight". Advances in Civil Engineering 2019 (16 de diciembre de 2019): 1–19. http://dx.doi.org/10.1155/2019/3965374.

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This paper performs an extensive literature survey and example investigation on the stabilisation of slurry wall trenches during the construction of diaphragm wall panel trenches, and the failure modes of slurry wall trench instability, the stability theoretical analysis models and methods, the slurry formation and its protection mechanism, the influence of related factors on slurry wall trench stabilisation, and other related problems are summarized and analyzed emphatically. And then, based on the limit equilibrium analysis method, the mechanical models of the overall stability and local stability of the trench wall are established, respectively, and the design method of slurry unit weight is derived to ensure the stability of the trench wall. Furthermore, an example application shows that the established slurry unit weight design method is reliable. At last, this paper also proposes the focus and direction for follow-up work, that is, to construct an accurate and effective theoretical analysis model of slurry wall trench instability considering the influence of multiple factors and the calculation method of the slurry cake and its mechanical or mathematical relationship with slurry quality.

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3

Zhang, Jun, Huie Chen, Cheng Qiu Cai, Ming Yuan Shi, Huan Yan y Zong Fang Chen. "Study on Influencing Factors and Control Measures of Diaphram Wall Panel Trench". Advanced Materials Research 535-537 (junio de 2012): 1851–54. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1851.

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The stability of the slurry wall in the process of slurry supporting into slot directly affects the stability of the pit. This paper analyzes the key factors for deformation control, researches the influencing factors on slurry wall stability during slurry trenching and concreting for diaphragm wall, and proposes control measures to control the stability of slurry wall and matters need attention, which is of great significance to guide the foundation construction.

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4

Nasr-El-Din, H., C. A. Shook y M. N. Esmail. "Wall sampling in slurry systems". Canadian Journal of Chemical Engineering 63, n.º 5 (octubre de 1985): 746–53. http://dx.doi.org/10.1002/cjce.5450630507.

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5

Liu, Zhaoxia, Wenhui Bian, Gang Pan, Pengcheng Li y Wenxin Li. "Influences on Shotcrete Rebound from Walls with Random Roughness". Advances in Materials Science and Engineering 2018 (23 de octubre de 2018): 1–12. http://dx.doi.org/10.1155/2018/7401358.

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Concrete slurry can be sprayed on walls for reinforcement; however, there is a certain amount of rebound which is hazardous, lowers production quality, and wastes material. To investigate this problem, we studied single slurry droplets at the mesoscopic level. We deduced the factors influencing droplet spreading and wall adhesion to create models of shotcrete rebound. Then, a numerical simulation orthogonal experiment investigating droplet-wall impacts was performed. The relationship between the spreading coefficient and each influencing factor is discussed, and numerical models are presented. Finally, the obtained models are verified by physical experiments. The results show that the spreading coefficient can be used to better characterize the effect of slurry droplet adhesion to walls. Modeled and experimentally observed droplet-wall impacts showed good consistency. The influence of each factor on the spreading coefficient was determined in the following order of strength: droplet velocity and viscosity, wall roughness, and surface tension. The spreading coefficient increases with velocity, decreases with viscosity and roughness, and increases first and then decreases with surface tension. This study improves the fluid dynamics-based theory of multiphase flow in concrete slurry and provides a theoretical basis for mitigating shotcrete rebound.

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6

Soroush, Abbas y Mohammad Soroush. "Parameters affecting the thickness of bentonite cake in cutoff wall construction: case study and physical modeling". Canadian Geotechnical Journal 42, n.º 2 (1 de abril de 2005): 646–54. http://dx.doi.org/10.1139/t04-090.

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Concrete cutoff walls are usually constructed using a panel-by-panel technique in which primary panels are constructed with space between them and then secondary panels are constructed and inserted in the spaces. A small thickness of residual bentonite cake from the slurry used during excavation usually remains in the construction joints between adjacent primary and secondary panels. The thickness of such bentonite-filled joints should be minimized in terms of the performance of the cutoff wall in controlling seepage. This research experimentally evaluated the effects of a number of design and construction parameters on the thickness of the bentonite cake using data from a case study (the cutoff wall of Karkheh Dam). A physical model test was developed and a number of tests were conducted. The test results showed that parameters such as age of the primary panels, cement content of the slurry, quantity of additives in the slurry, and circulation versus noncirculation of the slurry are responsible for the thickness of the bentonite cake. The results are presented and analyzed.Key words: cutoff wall, plastic concrete, bentonite slurry, bentonite cake, physical model.

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7

Hansmire, William H., Henry A. Russell, Robert P. Rawnsley y Eldon L. Abbott. "Field Performance of Structural Slurry Wall". Journal of Geotechnical Engineering 115, n.º 2 (febrero de 1989): 141–56. http://dx.doi.org/10.1061/(asce)0733-9410(1989)115:2(141).

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8

NASR-EL-DIN, H., A. AFACAN y J. H. MASLIYAH. "WALL SAMPLING FROM HORIZONTAL SLURRY PIPELINES". Chemical Engineering Communications 82, n.º 1 (agosto de 1989): 203–21. http://dx.doi.org/10.1080/00986448908940642.

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9

Haghayeghi, Abdol y Yousef Alostaz. "Approach to Designing Structural Slurry Wall". Journal of Geotechnical and Geoenvironmental Engineering 127, n.º 2 (febrero de 2001): 194. http://dx.doi.org/10.1061/(asce)1090-0241(2001)127:2(194).

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10

Navon, D., R. C. Loehr, H. M. Liljestrand y D. E. Daniel. "Impact of biodegradable trenching slurry on iron treatment wall performance". Water Science and Technology 38, n.º 7 (1 de octubre de 1998): 49–53. http://dx.doi.org/10.2166/wst.1998.0276.

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Biodegradable trenching slurries have been proposed as a cost effective method for the emplacement of reactive treatment barriers. In this study, the impact of a bio-polymer slurry on the ability of zero-valent iron to reductively dehalogenate trichloroethene was measured. First-order trichloroethene degradation rates were determined for three types of iron, with and without slurry in batch reactions. For the commercial grade iron, a significant difference was determined between the surface area normalized rate without slurry (1.78E-4 L m−2 hr−1) and with slurry (1.23E-4 L m−2 hr−1). However, no significant difference was determined with or without bio-slurry for the reagent grade irons.

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11

Dai, Guozhong, Yanmin Sheng, Yutao Pan, Guicai Shi y Shujin Li. "Application of a Bentonite Slurry Modified by Polyvinyl Alcohol in the Cutoff of a Landfill". Advances in Civil Engineering 2020 (13 de enero de 2020): 1–9. http://dx.doi.org/10.1155/2020/7409520.

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Soil-bentonite cutoff walls are usually used to contain the contaminants of landfills. The pumpability, permeability, and adsorption capability of the slurry are all crucial to the performance of the cutoff wall. In this study, the effect of polyvinyl alcohol (PVA) was used to improve the performance of bentonite slurry. A series of lab tests were conducted to evaluate the pumpability, permeability, and adsorption capacity with different concentrations of PVA treatment. Results show that the addition of PVA can increase the fluidity and pumpable period of slurry, which facilitates the casting and grouting during construction. The addition of PVA also helps to reduce the permeability coefficient of slurry and improve the adsorption capability which enhances the cutoff performance of the walls.

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12

Yang, Yu-Ling, Krishna R. Reddy, Wen-Jie Zhang, Ri-Dong Fan y Yan-Jun Du. "SHMP-Amended Ca-Bentonite/Sand Backfill Barrier for Containment of Lead Contamination in Groundwater". International Journal of Environmental Research and Public Health 17, n.º 1 (6 de enero de 2020): 370. http://dx.doi.org/10.3390/ijerph17010370.

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This study investigated the feasibility of using sodium hexametaphosphate (SHMP)- amended calcium (Ca) bentonite in backfills for slurry trench cutoff walls for the containment of lead (Pb) contamination in groundwater. Backfills composed of 80 wt% sand and 20 wt% either Ca-bentonite or SHMP-amended Ca-bentonite were tested for hydraulic conductivity and sorption properties by conducting laboratory flexible-wall hydraulic conductivity tests and batch isothermal sorption experiments, respectively. The results showed that the SHMP amendment causes a one order of magnitude decrease in hydraulic conductivity of the backfill using tap water (1.9 to 3.0 × 10−10 m/s). Testing using 1000 mg/L Pb solution resulted insignificant variation in hydraulic conductivity of the amended backfill. Moreover, SHMP-amendment induced favorable conditions for increased sorption capacity of the backfill, with 1.5 times higher retardation factor relative to the unamended backfill. The Pb transport modeling through an hypothetical 1-m-thick slurry wall composed of amended backfill revealed 12 to 24 times of longer breakthrough time for Pb migration as compared to results obtained for the same thickness slurry wall with unamended backfill, which is attributed to decrease in seepage velocity combined with increase in retardation factor of the backfill with SHMP amendment. Overall, SHMP is shown to be a promising Ca-bentontie modifier for use in backfill for slurry trench cutoff wall for effective containment of Pb-contaminated groundwater.

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13

Shook, C. A. y A. S. Bartosik. "Particle—wall stresses in vertical slurry flows". Powder Technology 81, n.º 2 (noviembre de 1994): 117–24. http://dx.doi.org/10.1016/0032-5910(94)02877-x.

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14

Conte, Lisa, Joe Graham-Felsen y Amanda Trienens. "The Slurry Wall: Past, Present, and Future". Studies in Conservation 65, sup1 (23 de mayo de 2020): P44—P50. http://dx.doi.org/10.1080/00393630.2020.1765644.

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15

Tsai, Jiin-Song, Lee-Der Jou y Hsii-Sheng Hsieh. "A full-scale stability experiment on a diaphragm wall trench". Canadian Geotechnical Journal 37, n.º 2 (1 de abril de 2000): 379–92. http://dx.doi.org/10.1139/t99-122.

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This paper presents the results of a full-scale field experiment on the stability of a slurry-filled diaphragm wall trench. The objective of this experiment was to observe the failure pattern of a slurry-supported trench excavated in sandy ground. Ground responses, including settlement and lateral deformation of the surrounding ground adjacent to the experimental trench, were carefully monitored during the experiment. The stability of the trench was examined by lowering the slurry level in stages. The trench was deliberately failed. Field observations indicated that the experimental trench failed in 2 h in a progressive sliding pattern that resulted in a near-hemispherical cave-in of the adjacent ground. In this paper, a failure mechanism of the trench is proposed and an analytical method is adopted to back-analyze the stability of the trench. The stability of the trench and the failure pattern can be accurately analyzed using the method of Tsai and Chang.Key words: full-scale experiment, field test, slurry trench, stability analysis.

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16

Churkin, A. A. y I. N. Lozovsky. "QUALITY ASSURANCE OF DIAPHRAGM AND PILE WALLS BY GEOPHYSICS". Construction and Geotechnics 11, n.º 2 (15 de diciembre de 2020): 49–61. http://dx.doi.org/10.15593/2224-9826/2020.2.05.

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Underground structures like diaphragm and pile walls are constructed to organize waterproof curtains, protect pit sides, and transfer loads from the structures. Violations of the construction technological process can lead to the formation of defects. To prevent adverse consequences, before excavation, it is necessary to control the integrity of the slurry walls using non-destructive geophysical methods. A review of geophysical slurry wall quality control methods based on the excitation and registration of physical fields through access tubes installed in the reinforcement cage, in wells drilled near the structure or on the surface of the structure, is presented. The main capabilities and limitations of the methods are given. Cross-hole ultrasonic logging was used to study the section of the slurry wall during the construction of the Moscow Metro station. The results of parallel soundings made it possible to identify anomalous zones, interpreted as defects. The geometric dimensions of one of the major defects were refined by ultrasonic tomography. For the first time in Russian testing practice, thermal integrity profiling was applied to study the diaphragm wall at the base of a residential building. The results of temperature monitoring during the concrete hardening are presented. According to the method, a major flaw, excess of the design mark of the wall bottom and bulging of the structure were revealed. The results of thermal integrity profiling were verified by ultrasonic logging. The combined use of thermal and ultrasonic methods can be recommended as a reliable tool for integrity testing of diaphragm and pile walls. To carry out the measurements, the access tubes shall be included in the reinforcement cage of the structure at the design stage.

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17

Wang, Yong, Ling Wei Kong y Ai Guo Guo. "Effects of Shallow Gas on Diaphragm Wall Trenching Construction of Hangzhou Metro". Advanced Materials Research 255-260 (mayo de 2011): 3993–97. http://dx.doi.org/10.4028/www.scientific.net/amr.255-260.3993.

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Considering adverse effects of shallow gas geology on Hangzhou Metro construction, based on the fluid-solid coupling analytical method of multi-phase media, effects of shallow gas on diaphragm wall trenching construction were examined by using FLAC-2D software. In combination with the diaphragm works of a typical subway station in the region buried shallow gas, the deformation on slurry trench of diaphragm wall were analyzed under working conditions using different specific gravity slurry. Results show that shallow gas escape of the stratum significantly affects stability of the groove wall, easily leading to collapse of the soil and resulting in the concrete diaphragm wall with quality problems such as honeycomb, reducing diameter, bulging, breaking zone and etc. In trenching construction of the diaphragm wall, increasing the specific gravity of slurry appropriately is an effective way to reduce adverse effects of the shallow gas, but it should not be too large. A suitable range of mud weight varies from 1.06 to 1.10.

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18

Asker, Kamel, Mohamed Bahr, Ahmed El-Attar y Mohamed Fouad. "Minimizing of tunneling effect on existing infrastructure in Egypt". Przegląd Naukowy Inżynieria i Kształtowanie Środowiska 30, n.º 1 (1 de abril de 2021): 3–15. http://dx.doi.org/10.22630/pniks.2021.30.1.1.

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A set of parametric studies by using the Abaqus software is conducting to investigate the effective method to seal the CWO sewer from the tunneling process. These methods include: (i) two deep grouted walls, (ii) adjacent slurry piles, (iii) bored reinforced concrete piles assisted with slurry piles, and (iv) grouted block confining the twin tunnel wall. Based on the results of parametric studies. Most of the protective studied technique was effective on reducing the tunneling effect on the ground movements.

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19

Zou, Zheng Sheng, Xin Liu, Wen Qing Zhang y Qing Hua Kong. "A Dry Trenching Diaphragm Wall in Soft Soil". Applied Mechanics and Materials 170-173 (mayo de 2012): 666–69. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.666.

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Generally, it is difficult to control the trench stability and panel joint permeability in the construction of a diaphragm wall. The high construction cost is inevitable because of the environmental pollution due to the slurry, waste of water consumption, and debris disposal treatment. A new technique, called the dry trenching diaphragm wall with self-guided double-rectangular-casing, is thereafter developed in the current study to avoid these problems. In this technique, two pieces of rectangular steel casing are driven in sequence and guided each other. The trench is made by squeezing into the soft soil. The panel alignment and straightness are assured without any joints due to the dry concrete pouring instead of the influences of the slurry. Compared to the regular diaphragm wall, the technique is an environment-friendly, less emissive and energy-conserved one by eliminating the slurry pollution with the low cost. It shows that the quality of panel connection is reliable, and the permeation-proof performance is superior with high efficiency in wall-forming due to non-joint interlocking.

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20

Filho, João Alexandre Paschoalin y Antonio José Guerner Dias. "The use of polymer slurry as an economic and sustainable way to build diaphragm walls – A case study of a construction work in São Paulo/Brazil". Exacta 11, n.º 3 (20 de febrero de 2014): 299–306. http://dx.doi.org/10.5585/exactaep.v11n3.4562.

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The Civil Construction Industry is one of the first economic sectors to react to the stimuli of favorable economic conditions of a country. In such a scenario, new tools of management and reuse of the solid waste from building sites have been extensively discussed in technical meetings. In this paper a case study is described about a building work located in the city of São Paulo, Brazil where a polymer slurry was used as drilling mud for excavation work of diaphragm walls, instead of bentonite slurry. Based on the data evaluated during the study of the mentioned case, it was possible to conclude that the use of polymer slurry in the excavation of the diaphragm wall is not only technically as well as it is economically feasible, besides presenting several environmental advantages when compared to the bentonite slurry

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21

Dzeng, Ren-Jye y Nang-Fei Pan. "Learning heuristics for determining slurry wall panel lengths". Automation in Construction 15, n.º 3 (mayo de 2006): 303–13. http://dx.doi.org/10.1016/j.autcon.2005.06.003.

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22

Рыбникова, Irina Rybnikova, Рыбников y Aleksandr Rybnikov. "EXPERIENCE DEVICE SUNK CONSTRUCTION MANNER PILE «SLURRY WALL»". Bulletin of Belgorod State Technological University named after. V. G. Shukhov 2, n.º 4 (29 de marzo de 2017): 32–35. http://dx.doi.org/10.12737/article_58e61337953177.28335849.

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23

Kojima, Hiromitsu, Shigeharu Tachikawa, Wataru Fujiwara, Yukio Kanda y Toshihito Urusibara. "Chemical absorption into slurry in wetted-wall column." JOURNAL OF CHEMICAL ENGINEERING OF JAPAN 25, n.º 6 (1992): 752–55. http://dx.doi.org/10.1252/jcej.25.752.

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24

Matoušek, V. "Pipe-Wall Friction in Vertical Sand-Slurry Flows". Particulate Science and Technology 27, n.º 5 (3 de septiembre de 2009): 456–68. http://dx.doi.org/10.1080/02726350903133179.

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25

FERRE, ALAN L. y CLIFTON A. SHOOK. "COARSE PARTICLE WALL FRICTION IN VERTICAL SLURRY FLOWS". Particulate Science and Technology 16, n.º 2 (abril de 1998): 125–33. http://dx.doi.org/10.1080/02726359808906790.

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26

Tsai, Jiin-Song y Jia-Chyi Chang. "Three-dimensional stability analysis for slurry-filled trench wall in cohesionless soil". Canadian Geotechnical Journal 33, n.º 5 (6 de noviembre de 1996): 798–808. http://dx.doi.org/10.1139/t96-105-325.

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On the basis of the limiting equilibrium and arching theory, a three-dimensional analysis is proposed for slurry-supported trenches in cohesionless soils. This analytical approach is developed by considering the trench stability problem as a vertical soil cut within a fictitious half-silo with a rough wall surronding. Arching effects are considered not only in the vertical direction but also in the horizontal direction. A shell-shaped slip surface of the sliding soil mass is defined by Mohr-Coulomb criterion. The factor of safety is defines as the ratio of the resisting force induced by slurry pressure to the horizontal force required to maintain the stability of the trench wall. Results of the proposed method have been compared with those of two existing analytical methods for a typical trench stability problem. Key words: stability analysis, slurry trench wall, cohesionless soil.

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27

Sun, By Pinghe, Binkui Zhao, Han Cao, Jingyuan Wang, Dingqiang Mo y Shaohe Zhang. "Lab Study on the Effect of Cation Exchange Capacity on Slurry Performance in Slurry Shields". Advances in Civil Engineering 2018 (3 de octubre de 2018): 1–9. http://dx.doi.org/10.1155/2018/2942576.

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Ion stabilizers can enhance the reinforcement slurry effect on the wall and stabilize the wall actively in slurry shields. This paper presents different cation exchange capacities obtained by changing the content of the ion stabilizer (1.5%, 2.0%, 2.5%, 3.0%, 3.5%, 4.0%, 4.5%, 5.0%, 5.5%, and 6.0%) in slurry associated with the basis of the existing slurry formula through the laboratory tests. In order to study the effect of the cation exchange capacity on the performance of slurry properties, the rheological properties of the slurry are analyzed and evaluated by the power law model. Results indicate that the cation exchange capacity of the slurry decreases first and then increases with the increase of the ion stabilizer content. When the content of the ion stabilizer is maintained at 3.50%, the cation exchange capacity reaches the minimum value of 2.92. The filtration volumes, pH values, and rheological parameters of the slurry also indicate an obvious linear change with the change of the cation exchange capacity. The minimum filtration volume is 9.70 mL/30 min when the ion stabilizer content reaches 3.50%. However, the pH value reaches the maximum, that is, 11.34 which is changed from 10, and the change could be considered as a constant value in the field work. When the cation exchange capacity increases, the continuity of polymer structure in the slurry decreases first and then increases, the flow index and consistency coefficient are located within a reasonable range, and the rheological properties of the slurry meet the design requirements of the standards.

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28

Guo, Qiang y Yu Kui Li. "A Study for the Fabrication of Wall-Shaped Support Spacer in a Field Emission Display Panel". Advanced Materials Research 186 (enero de 2011): 71–74. http://dx.doi.org/10.4028/www.scientific.net/amr.186.71.

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Using insulation slurry as composite material, the wall-shaped support spacer was designed and fabricated on the cathode back-plane. In the fabrication course of support spacer, the high effective screen-printing technique was employed to prepare the insulation slurry layer on the separation layer surface of cathode back-plane. And the conventional sintering process was utilized to solidify the printed insulation slurry layer subsequently. Many insulation slurry layers were sintered and stacked to form the support spacer arranged in equilateral triangle form. The carbon nanotube was used as field emitter, and the field emission display panel was fabricated and sealed with glass frit, which possessed good field emission characteristics and better image uniformity.

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29

Yang, Bao Zhu, Shu Chao Zhang y Kai Yun Luan. "Numerical Analysis of Slot Stability during the Supper-Deep Diaphragm Wall Construction". Applied Mechanics and Materials 438-439 (octubre de 2013): 1043–47. http://dx.doi.org/10.4028/www.scientific.net/amm.438-439.1043.

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Two subway stations of line Z1 were built in Tianjin cultural center and Tianjin Yujiapu traffic hub. The diaphragm wall depth of the two stations was more than 60 m. The geological and hydraulic conditions were different in the two site. Keeping stability of slot wall was the key of supper-deep diaphragm wall construction to the both stations. Two 3D numerical models were built by ABQUS software to simulate the grooving process. The conditions of different slurry specific gravity and grooving depth were calculated. The deformation laws of the slot wall and ground settlement around the slot wall were studied. The results showed the upper soft silty clay and deeper silty sand layers were easy collapse. Finally, some technologies such as "] [" type guide wall, properly improving slurry specific gravity, soil cement mixing reinforcement were suggested to improve the stability during the diaphragm wall construction of the two stations.

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30

Zhang, Chuan-Wei, Fang-Yi Li, Jian-Feng Li, Hai-Yang Lu y Geng Wang. "Bubble Wall Rupture Model for Open Cell Structure in Starch/Fiber Heterogeneous Composites". Journal of Biobased Materials and Bioenergy 14, n.º 2 (1 de abril de 2020): 169–77. http://dx.doi.org/10.1166/jbmb.2020.1955.

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Starch/fiber heterogeneous composites were prepared through thermos-cavity foaming machine. Open cell structures are widely distributed in the heterogeneous composites. Bubble wall rupture is an inevitable stage in the formation of open cells. Different from the conventional models to explain the bubble wall rupture from the energy and the wave point of view, this study suggests the "local thinning ultimate stress" model to reveal the bubble wall rupture from the stress perspective. The local stress of the starch bubble wall is increased with the thinning of the bubble wall. The bubble wall ruptures when local stress exceeds the ultimate surface tension. Starch slurry retraction occurs after bubble wall rupturing. The elastic retraction drives partially open cells to fully open cell morphologies in the starch/fiber heterogeneous composite. The developed mechanism was validated by starch/fiber slurry with different viscosities to design a novel biodegradable composite with fully open cell structures.

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31

Marchiori, Alan, Yadong Li y Jeffrey Evans. "Design and Evaluation of IoT-Enabled Instrumentation for a Soil-Bentonite Slurry Trench Cutoff Wall". Infrastructures 4, n.º 1 (11 de enero de 2019): 5. http://dx.doi.org/10.3390/infrastructures4010005.

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In this work, we describe our approach and experiences bringing an instrumented soil-bentonite slurry trench cutoff wall into a modern IoT data collection and visualization pipeline. Soil-bentonite slurry trench cutoff walls have long been used to control ground water flow and contaminant transport. A Raspberry Pi computer on site periodically downloads the sensor data over a serial interface from an industrial datalogger and transmits the data wirelessly to a gateway computer located 1.3 km away using a reliable transmission protocol. The resulting time-series data is stored in a MongoDB database and data is visualized in real-time by a custom web application. The system has been in operation for over two years achieving 99.42% reliability and no data loss from the collection, transport, or storage of data. This project demonstrates the successful bridging of legacy scientific instrumentation with modern IoT technologies and approaches to gain timely web-based data visualization facilitating rapid data analysis without negatively impacting data integrity or reliability. The instrumentation system has proven extremely useful in understanding the changes in the stress state over time and could be deployed elsewhere as a means of on-demand slurry trench cutoff wall structural health monitoring for real-time stress detection linked to hydraulic conductivity or adapted for other infrastructure monitoring applications.

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32

Chen, Guan-Nian, Peter John Cleall, Yu-Chao Li, Ze-Xi Yu, Han Ke y Yun-Min Chen. "Decoupled Advection-Dispersion Method for Determining Wall Thickness of Slurry Trench Cutoff Walls". International Journal of Geomechanics 18, n.º 5 (mayo de 2018): 06018007. http://dx.doi.org/10.1061/(asce)gm.1943-5622.0001130.

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33

Schultz, Michael S. y Terry W. Young. "Slurry wall containment at National Grid’s Harbor Point site". Land Contamination & Reclamation 14, n.º 2 (1 de abril de 2006): 483–88. http://dx.doi.org/10.2462/09670513.757.

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34

Mizuno, Naoya, Mitsuo Nagashima, Soichi Makino y Takeji Okada. "Prevention of Blocking of Tremie for Slurry Wall Construction". Concrete Research and Technology 8, n.º 1 (1997): 251–65. http://dx.doi.org/10.3151/crt1990.8.1_251.

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35

KIMURA, Katsuhiko, Takeji OKADA, Sigemi WAKAYAMA y Sadao GOTO. "Full scale experimental study on high strength slurry wall." Doboku Gakkai Ronbunshu, n.º 397 (1988): 143–50. http://dx.doi.org/10.2208/jscej.1988.397_143.

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36

FUJITA, Shin-ichi, Toshinari GIKA, Masahiro YURUGI y Noboru SAKATA. "An experimental study on large scale slurry wall concrete." Doboku Gakkai Ronbunshu, n.º 435 (1991): 129–38. http://dx.doi.org/10.2208/jscej.1991.435_129.

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37

Manassero, M. "Hydraulic Conductivity Assessment of Slurry Wall Using Piezocone Test". Journal of Geotechnical Engineering 120, n.º 10 (octubre de 1994): 1725–46. http://dx.doi.org/10.1061/(asce)0733-9410(1994)120:10(1725).

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38

Wilson, K. C., R. S. Sanders, R. G. Gillies y C. A. Shook. "Verification of the near-wall model for slurry flow". Powder Technology 197, n.º 3 (enero de 2010): 247–53. http://dx.doi.org/10.1016/j.powtec.2009.09.023.

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39

Kotlyar, V. D., K. A. Lapunova y G. A. Kozlov. "Wall Ceramics Products Based on Opoka and Coal Slurry". Procedia Engineering 150 (2016): 1452–60. http://dx.doi.org/10.1016/j.proeng.2016.07.080.

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40

Shi, Mao Yin y Fu Gui Song. "On Stability and Deformation of Slurry-Trench Affected by Formation Equipment". Applied Mechanics and Materials 580-583 (julio de 2014): 805–11. http://dx.doi.org/10.4028/www.scientific.net/amm.580-583.805.

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A synthesized investigation is conducted of trench formation machine’s effect on trench wall in soft soil area. The failure pattern of the slurry-trench is analyzed by means of 3D FEM based on strength reduction method. The investigation shows that the global instibility occurs in the superficial layers and speads along the trench segment. The grab movement in slurry has an instant impact on the trench wall and may cause local instability. The overload and construction technique of trench formation equipment are both important concerns during trench construction to ensure safetry.

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41

Zhang, Yan Lai, Zhong Hao Rao, Jie Fei Xie y Shuang Feng Wang. "Heat Storage Experiment of the Microencapsulated Phase Change Material Slurry in a Horizontal Rectangular Tank". Advanced Materials Research 214 (febrero de 2011): 662–67. http://dx.doi.org/10.4028/www.scientific.net/amr.214.662.

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Heat storage experiment by natural convection in rectangular tanks heated from below has been conducted with fluidity slurry composed of microencapsulated phase change material (PCM). The slurry shows a peak value in the specific heat capacity with latent heat at the temperature of about T = 31 °C. The effects of the heating wall temperature TH, the PCM mass concentration Cm of the PCM slurry and the height H of the tank on heat storage are revealed, respectively.

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42

Mehta, Dhruv, Adithya Thota Radhakrishnan, Jules van Lier y Francois Clemens. "Sensitivity Analysis of a Wall Boundary Condition for the Turbulent Pipe Flow of Herschel–Bulkley Fluids". Water 11, n.º 1 (22 de diciembre de 2018): 19. http://dx.doi.org/10.3390/w11010019.

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This article follows from a previous study by the authors on the computational fluid dynamics-based analysis of Herschel–Bulkley fluids in a pipe-bounded turbulent flow. The study aims to propose a numerical method that could support engineering processes involving the design and implementation of a waste water transport system, for concentrated domestic slurry. Concentrated domestic slurry results from the reduction in the amount of water used in domestic activities (and also the separation of black and grey water). This primarily saves water and also increases the concentration of nutrients and biomass in the slurry, facilitating efficient recovery. Experiments revealed that upon concentration, domestic slurry flows as a non-Newtonian fluid of the Herschel–Bulkley type. An analytical solution for the laminar transport of such a fluid is available in literature. However, a similar solution for the turbulent transport of a Herschel–Bulkley fluid is unavailable, which prompted the development of an appropriate wall function to aid the analysis of such flows. The wall function (called ψ 1 hereafter) was developed using Launder and Spalding’s standard wall function as a guide and was validated against a range of experimental test-cases, with positive results. ψ 1 is assessed for its sensitivity to rheological parameters, namely the yield stress, the fluid consistency index and the behaviour index and their impact on the accuracy with which ψ 1 can correctly quantify the pressure loss through a pipe. This is done while simulating the flow of concentrated domestic slurry using the Reynolds-Averaged Navier–Stokes (RANS) approach for turbulent flows. This serves to establish an operational envelope in terms of the rheological parameters and the average flow velocity within which ψ 1 is a must for accuracy. One observes that, regardless of the fluid behaviour index, ψ 1 is necessary to ensure accuracy with RANS models only in flow regimes where the wall shear stress is comparable to the yield stress within an order of magnitude. This is also the regime within which the concentrated slurry analysed as part of this research flows, making ψ 1 a requirement. In addition, when the wall shear stress exceeds the yield stress by more than one order (either due to an inherent lower yield stress or a high flow velocity), the regular Newtonian wall function proposed by Launder and Spalding is sufficient for an accurate estimate of the pressure loss, owing to the relative reduction in non-Newtonian viscosity as compared to the turbulent viscosity.

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43

Kremieniewski, Marcin. "Ultra-Lightweight Cement Slurry to Seal Wellbore of Poor Wellbore Stability". Energies 13, n.º 12 (16 de junio de 2020): 3124. http://dx.doi.org/10.3390/en13123124.

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The article presents the recipe for ultra-lightweight cement slurry for wellbore sealing. In ordinary lightweight cement slurries, the addition of microspheres and a large amount of water are used to maintain rheological parameters. This is a problem because the light particles of microspheres segregate. The cement sheath from such a cement slurry has an anisotropic microstructure and does not stabilize the casing column. In the new ultra-light cement slurry, 60% aluminosilicate microspheres and a large amount of water were used. The ultra-light weight slurry has a density below 1.2 g/cm3. This cement slurry does not segregates and in the sedimentation stability test has the same density at all measuring points. The cement slurry, despite the larger amount of water, has the same filtration as the control sample. The technological parameters of the slurry are adapted to the borehole conditions. Cement slurry is a ready-made application to seal a borehole with poor wellbore stability under conditions of 40 °C and 10 MPa pressure. The cement sheath structure in the wellbore after binding is homogeneous. The use of such slurry allows to reduce the risk of wall damage in wellbores of poor stability.

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44

Jing, Xiang Dang, Bo Yu y Jun Ge Xie. "Retartation Performance to Pollutants of Antiseepage Slurry for Waste Landfill Sites". Advanced Materials Research 356-360 (octubre de 2011): 1551–55. http://dx.doi.org/10.4028/www.scientific.net/amr.356-360.1551.

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Based on self-developed bentonite - fly ash - cement（BFC）slurry and flexible wall permeameter, infiltration test was conducted on slurry concretion samples of different height using heavy metal ions Solution and leachate from waste landfill site. Test proved that as a result of the infiltration deposition and adsorption residence performance, retardation by slurry concretion happened in about 30mm of initial infiltration to 95% of heavy metal ion pollutants(Hg, As, Pb, Cr, Cd etc.) and 60% of waste leachate pollutants (NH4-N, TN, TP, CODCr, BOD5 etc.). Moreover, blocking rate for all pollutants presents an increasing trend along with the increase of the height of slurry concretion samples in a defined way.

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45

Singh, Jashanpreet, Jatinder Pal Singh, Mandeep Singh y Miroslaw Szala. "Computational analysis of solid particle-erosion produced by bottom ash slurry in 90° elbow". MATEC Web of Conferences 252 (2019): 04008. http://dx.doi.org/10.1051/matecconf/201925204008.

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Present work is devoted to investigation of the slurry erosion wear in a 90° elbow by using commercial Computational fluid dynamics (CFD) code FLUENT. Discrete phase erosion wear model was used to predict erosion in 90° elbow by solving the governing equations through Euler-Lagrange scheme. Particle tracking was considered by using standard k-ε turbulence scheme for the flow of bottom ash slurry. Erosion wear in elbow was investigated along with velocity distribution and turbulence intensity. The radius-to-diameter (r/D) ratio was taken as 1.5. Results show that erosion rate increases with increase in velocity. Present numerical simulation model holds close agreement with previous studies. Distorted patterns appeared at low velocities. The V-shape pattern appeared on the outer wall of elbow at high velocities. The low velocity region occurs around circumference of elbow wall at outer wall of elbow due to stimulation of the drag forces near the wall region.

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46

Siebers, D. L. y T. M. Dyer. "The Autoignition and Combustion of Coal-Water Slurry Under Simulated Diesel Engine Conditions". Journal of Engineering for Gas Turbines and Power 108, n.º 4 (1 de octubre de 1986): 654–60. http://dx.doi.org/10.1115/1.3239961.

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The combustion characteristics of a coal-water slurry spray were examined under diesel engine conditions. A two-stage combustion process was used to simulate the diesel engine conditions in a constant-volume combustion bomb. The combustion characteristics investigated were ignition delay, ignition site, combustion development, combustion duration, and combustion completeness. The results show that the ignition delay of the coal-water slurry fuel is temperature and pressure dependent. Also, the coal slurry ignition delay is approximately a factor of five longer and the energy release rate is significantly slower in comparison to the ignition delay and energy release rate for conventional No. 2 diesel fuel. The combustion of the slurry spray was incomplete for all test conditions due to the impingement and the adherence of the coal slurry on the wall. This fundamental testing provides insight into engine design parameters which must be considered if coal-water slurry is to be used in practice.

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47

Kashir, Mansor y Ernest K. Yanful. "Compatibility of slurry wall backfill soils with acid mine drainage". Advances in Environmental Research 4, n.º 3 (agosto de 2000): 251–68. http://dx.doi.org/10.1016/s1093-0191(00)00027-7.

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48

Wilson, K. C. y A. Sellgren. "Interaction of Particles and Near-Wall Lift in Slurry Pipelines". Journal of Hydraulic Engineering 129, n.º 1 (enero de 2003): 73–76. http://dx.doi.org/10.1061/(asce)0733-9429(2003)129:1(73).

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49

Asada, M., A. Ishikawa y S. Horiuchi. "Large-Scale Cutoff Wall Model Test Using Ethanol Bentonite Slurry". Journal of Materials in Civil Engineering 17, n.º 6 (diciembre de 2005): 719–24. http://dx.doi.org/10.1061/(asce)0899-1561(2005)17:6(719).

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50

Azimi, Amir Hossein, David Z. Zhu y Nallamuthu Rajaratnam. "Experimental Study of Subaqueous Sand Deposition from Slurry Wall Jets". Journal of Engineering Mechanics 140, n.º 2 (febrero de 2014): 296–314. http://dx.doi.org/10.1061/(asce)em.1943-7889.0000664.

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