Journal articles: 'Fresh concrete waste'

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Abdollahnejad, Zahra, Mohammad Mastali, Mahroo Falah, Tero Luukkonen, Mehran Mazari, and Mirja Illikainen. "Construction and Demolition Waste as Recycled Aggregates in Alkali-Activated Concretes." Materials 12, no. 23 (2019): 4016. http://dx.doi.org/10.3390/ma12234016.

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The growth of global construction has contributed to an inevitable increase in the amount of construction and demolition (C&D) waste, and the recycling of C&D waste as aggregates in concrete is receiving increased interest, resulting in less demand for normal aggregates and bringing a potential solution for the landfilling of wastes. Recently, several studies have focused on the use of C&D waste in alkali-activated concrete to move one step closer to sustainable concretes. This paper focuses on the main mechanisms of using C&D waste in the resulting physical, mechanical, and durability properties of alkali-activated concrete in fresh and hardened state properties. The main difficulties observed with recycled aggregates (RA) in concrete, such as high levels of water demand, porous structure, and low mechanical strength, occur in RA alkali-activated concretes. These are associated with the highly porous nature and defects of RA. However, the high calcium concentration of RA affects the binder gel products, accelerates the hardening rate of the concrete, and reduces the flowability of alkali-activated concretes. For this reason, several techniques have been investigated for modifying the water content and workability of the fresh matrix and for treating RA and RA/alkali-activated binder interactions to produce more sustainable alkali-activated concretes.

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Wang, Ruixuan, and Y. X. Zhang. "Recycling fresh concrete waste: A review." Structural Concrete 19, no. 6 (2018): 1939–55. http://dx.doi.org/10.1002/suco.201800057.

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KAWANOBE, Masanori, Yoshihisa NAKATA, Torao KEMI, Hideaki ONAYA, Hajime TAKANO, and Yoshinori NARA. "STUDY ON PRECEDING MORTAR IN THE CONCRETE PUMPING PRACTICE RECYCLED FOR WASTE FRESH CONCRETE : Reuse of waste fresh concrete as a preceding mortar for concrete pumping." AIJ Journal of Technology and Design 5, no. 9 (1999): 1–6. http://dx.doi.org/10.3130/aijt.5.1_3.

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Bacarji, Edgar, V. C. Marques, and Romildo Dias Toledo Filho. "Self-Compacting and Conventional Concrete with Mineral Waste: Fresh and Hardened State Properties." Key Engineering Materials 517 (June 2012): 547–55. http://dx.doi.org/10.4028/www.scientific.net/kem.517.547.

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Environmental preservation has been a theme debated in virtually every country in the world. Many measures are being taken to reduce the environmental impact due to unplanned development. Growing environmental restrictions to the exploitation of sand from riverbeds have resulted in a search for alternative materials to produce fine aggregates, particularly near to larger metropolitan areas. Artificial fine aggregates then appear as an attractive alternative to natural fine aggregates for concrete. This work is the final part of a study about the use of residues in concretes. Conventional Concrete (CC) and Self-compacting concrete (SCC) were developed replacing the natural sand by two types of mineral waste. Fresh state tests such as slump-flow, L-box, V-funnel test and column test were performed according to the Brazilian standards. The rheological characteristics (yield stress and plastic viscosity) of the SCC were determined using the BTRHEOM rheometer. At the hardened state, compressive strength was determined at 3, 14 and 28 days of age. Modulus of elasticity test was carried out at 28 days. Curves to mixture design were obtained to SCC and CC. For all mixtures and properties analyzed the good performance of the mineral waste used was proven. Finally and more important, it was demonstrated that it is possible to obtain structural self-compacting concrete, self-compacting concrete without structural purposes and conventional concrete by using mineral waste that works like fine aggregates and that on the other hand, without any destination, would cause serious environmental impacts.

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Mohamed, Guendouz, and Boukhelkhal Djamila. "Physical, mechanical and thermal properties of Crushed Sand Concrete containing Rubber Waste." MATEC Web of Conferences 149 (2018): 01076. http://dx.doi.org/10.1051/matecconf/201814901076.

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Over the past twenty years, the rubber wastes are an important part of municipal solid waste. This work focuses on the recycling of rubber waste, specifically rubber waste of used shoes discharged into the nature and added in the mass of crushed sand concrete with percentage (10%, 20%, 30% and 40%). The physical (workability, fresh density), mechanical (compressive and flexural strength) and thermal (thermal conductivity) of different crushed sand concrete made are analyzed and compared to the respective controls. The use of rubber waste in crushed sand concrete contributes to reduce the bulk density and performance of sand concrete. Nevertheless, the use of rubber aggregate leads to a significant reduction in thermal conductivity, which improves the thermal insulation of crushed sand concrete.

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Correia, Sivaldo Leite, F. L. Souza, G. Dienstmann, Marilena Valadares Folgueras, and Dachamir Hotza. "Use of Aggregates from Recycled Concrete Mixer Trucks Waste in Concrete." Materials Science Forum 591-593 (August 2008): 854–59. http://dx.doi.org/10.4028/www.scientific.net/msf.591-593.854.

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This paper presents some of the results of an investigation on the possible applications of use of waste concrete aggregates from mixer trucks concrete productions (WCA) in concrete. The investigation has been carried out using factorial design for experimental design. For the study, the physical and mechanical properties along their durability of concrete produced with WCA were investigated and the results presented. Concrete mixtures were prepared using WCA as the replacement of natural fine aggregate at the level 10%, 20% and 30 wt.% with water/cement ratios of 0.40, 0.50 and 0.60. Properties of fresh and hardened concrete were evaluated: fresh unit weight, consistency, 7-day and 28-day compressive strength were carried out in specimens. The necessary data for establishing a mix proportion design and a quality control method are obtained using a full factorial design 32. The influence of level of WCA on the mineralogical composition has been established, and its suitability for use in a concrete application has been assessed. Empirical contour plots for the physical-mechanical properties of fresh and hardened concrete with WCA were obtained via regression analysis, which predict that as the amount of waste increases, has no or little effect on the compressive strength of concrete mixes. The results form confirmation experiments justify the prediction from the statistical approach.

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Gerges, Najib Nicolas, Camille Amine Issa, Samer Ahmad Fawaz, Jacques Jabbour, Johnny Jreige, and Aiman Yacoub. "Recycled Glass Concrete: Coarse and Fine Aggregates." European Journal of Engineering Research and Science 3, no. 1 (2018): 1. http://dx.doi.org/10.24018/ejers.2018.3.1.533.

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Conventional concrete aggregate consists of sand (fine aggregate) and various sizes and shapes of gravel or stones (coarse aggregate). However, there is a growing interest in substituting alternative aggregate materials, largely as a potential use for recycled materials. While there is significant research on many different materials for aggregate substitutes such as granulated coal ash, blast furnace slag or various solid wastes including fiberglass waste materials, granulated plastics, paper and wood products or wastes, sintered sludge pellets and others. Recycled waste glasses were used as coarse and fine aggregates replacement in concrete. Coarse aggregates were replaced with Green Bottles coarse aggregates at third, half, two thirds, and 100% replacement ratios. The replacement of a third coarse aggregate was established as being the most suitable for retaining the properties of the concrete mix design. As for fine aggregates, in order to account for the numbers of variables and clearly establish a bench mark, the sand grading, color of glass, source of waste glass (bottles and non-bottles), and design mix strength were used as parameters. Fine aggregates from green, brown, and transparent bottles in addition to clear window waste glass were used. Concrete properties were tested in fresh and hardened states. The incorporation of glass sand regardless of the ratios of replacement showed no significant influence on fresh or mechanical properties of concrete except for the case of transparent bottles. Transparent bottles due to the wide source of obtainability have introduced a non-uniform factor that caused discrepancy compared to the rest of the group.

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Hamza, Bensaci, Menadi Belkacem, Kenai Said, and Yahiaoui Walid. "Performance of self-compacting rubberized concrete." MATEC Web of Conferences 149 (2018): 01070. http://dx.doi.org/10.1051/matecconf/201814901070.

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Used tyre rubber wastes present a serious environmental problem of pollution and storage. The recycling of this waste in the industry of construction could be an appropriate solution to produce an eco-concrete and could contribute to the improvement of some of its properties. This paper aims to study the possibility of using tyre rubber waste as fine aggregate replacement in self-compacting concrete (SCC). Fines rubber particles of 0-2 mm of waste tyres were added SCC mixtures as a partial substitution of the total volume of sand at different percentages (5, 10, 15, 20 and 30%). The influence of fines rubber of used tyres on fresh and hardened properties of the SCC was investigated. The fresh properties of SCC were performed by using slump-flow, T50 flow time, L-box, V-funnel and segregation resistance tests. Characteristics of the hardened state were obtained by compressive strength and thermal conductivity. The experimental results showed that the inclusion of fines rubber in SCC decreases the workability, reduced its passing capacity and increases the possibility of blocking. A decrease in compressive strength is observed with the increase in rubber content. On the other hand, the incorporation of the rubber fines aggregates enhances in a remarkably way the thermal conductivity.

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Irwan, J. M., S. K. Faisal, Norzila Othman, Ibrahim Mohamad H. Wan, R. M. Asyraf, and M. M. K. Annas. "Performance of Concrete Using Light Waste PET Fibre." Advanced Materials Research 795 (September 2013): 352–55. http://dx.doi.org/10.4028/www.scientific.net/amr.795.352.

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The volume of polymeric wastes like polyethylene terephthalate bottles (PET) is increasing at a fast rate. PET bottles annual consumption represents more than 300,000 million units. The majority of the PET waste is sent to landfill. Since PET waste is not biodegradable, it can remain in nature for hundreds of years. Previous investigations already confirmed the potential of PET waste in replacing aggregates in concrete and represents better option than send it to landfill. This paper reviews researches published on the performance of concrete containing PET wastes. In this researches PET waste will be incorporated with an established binder namely fly Ash. The increase of workability is caused by the small spherical shapes of the fly ash that reduces the friction between cement and aggregates. Then it will results in an increase in the workability and flow of fresh concrete. Overall, the decision of using recycled waste plastic as fiber in structure for the design of structures provides enough benefits that will make it worthwhile to be considered as an economical attractive option. Once the use of performance concrete using light fibre becomes more popular and the importance of research contribution in providing technical knowledge on this new material becomes apparent. Furthermore this paper will bring new name for the new combination waste material is called Performance of Waste Light PET Fibre Concrete (WLPFC).

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El Biriane, Mohamed, and Mohamed Barbachi. "Properties of Sustainable Concrete with Mussel Shell Waste Powder." Open Civil Engineering Journal 14, no. 1 (2020): 350–64. http://dx.doi.org/10.2174/1874149502014010350.

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Background: The management of marine waste is a major concern in several countries. Recycling shell waste in concrete formulations may be one of the alternatives for producing sustainable materials at a lower cost. Objective: In this research paper, the performance of ground mussel waste for non-structural concrete formulation has been investigated. Methods: Two alternatives were explored in this research. The first aimed at incorporating treated Mussel Powder (MP) for partial substitution of cement (6, 12, and 24% by weight). The second aimed to investigate the feasibility of using MP as an additive with a proportion of 3, 6, 9 and 12% by weight of cement. Physico-mechanical properties of advanced composites have been studied in both fresh and hardened state through several laboratory tests. Results: The test results indicated that the inclusion of the MP allowed the formulation of concretes with normal density and lower air content. The mechanical behavior was characterized using new formulas adapted to the newly formulated concretes. Based on the obtained results, the treated MP could be used as a cement substitute with a proportion up to 12% or as a mineral additive with a percentage of 3% to produce a non-structural concrete that meets the normative requirements in terms of compressive and tensile strength. Conclusion: The recycling of mussel waste in concrete will contribute to the preservation of the environment by reducing the quantity of shellfish waste. The concept of “green” concrete can be achieved through the use of the formulated concretes in the paving works or as a blinding concrete.

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Wang, Qinghe, Yuzhuo Zhang, Yanfeng Fang, Yichao Zhang, and Fengyuan Wu. "Prediction of the mechanical behavior of recycled concrete with fresh concrete waste aggregate." Structural Concrete 21, no. 2 (2019): 761–71. http://dx.doi.org/10.1002/suco.201900115.

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Kou, Shi-cong, Bao-jian Zhan, and Chi-sun Poon. "Feasibility study of using recycled fresh concrete waste as coarse aggregates in concrete." Construction and Building Materials 28, no. 1 (2012): 549–56. http://dx.doi.org/10.1016/j.conbuildmat.2011.08.027.

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Kazaz, Aynur, Serdar Ulubeyli, and Murat Atici. "Economic viability analysis for fresh concrete waste reclaimers: The capacity of leftover concrete." KSCE Journal of Civil Engineering 22, no. 1 (2017): 12–23. http://dx.doi.org/10.1007/s12205-017-1462-4.

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Anjam, Ashkan Rah, and Hadi Faghihmaleki. "Laboratory Evaluation of the Performance of Recycled Aggregate Concrete Containing Construction and Stone Factories Waste in Terms of Compressive and Tensile Strength." Mathematical Problems in Engineering 2020 (August 20, 2020): 1–8. http://dx.doi.org/10.1155/2020/3054836.

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Nowadays, the rapid growth of waste production and, especially, construction wastes has become one of the main problems in societies. In the world, reinforced concrete structures are destructed for different reasons. These destructions generate increasing values of waste. Furthermore, there are several stone factories in every region that produce a large volume of decorative construction stone wastes. This experimental study has investigated the effect of using recycled aggregates of construction and stone factory wastes in concrete production. Different tests were performed on concrete samples in fresh state (slump) and hardened concrete (compressive and tensile strength and modulus of elasticity). The optimal percentage for replacement of each of the recycled materials was determined based on comparing the results of laboratory tests. Finally, a proper mix design was proposed for both recycled aggregate samples, and a comprehensive report of the results was also provided.

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Klus, Václavík, Dvorský, Svoboda, and Botula. "Reuse of Waste Material “Waste Sludge Water” from a Concrete Plant in Cement Composites: A Case Study." Applied Sciences 9, no. 21 (2019): 4519. http://dx.doi.org/10.3390/app9214519.

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This paper presents the results of research dealing with the use of recycled waste sludge water from a concrete plant (CP) as partial or complete replacement of mixing water in cement mixtures. The need to recycle waste sludge water generated as a by-product (waste sludge water) during the production of fresh concrete in the concrete plant results from the environmental and economic problems associated with the operation of the concrete plant. Mixing water was replaced with recycled waste sludge water in the amount of 25%, 50%, 75%, and 100%. In order to determine the effect of partial or complete replacement of mixing water with waste sludge water from the concrete plant in the production of cement composites, laboratory tests of waste sludge water were carried out to determine whether the waste sludge water complies with the requirements for mixing water defined in CSN EN 1008. The tests also determined the properties of fresh cement mortar and hardened cement composites. These were tests of the beginning and end of cement mortar setting, and the strength characteristics (flexural strength, compressive strength). The results of these tests show that it is possible to replace the mixing water by waste sludge water from the concrete plant in the amount of up to 25% without significantly affecting the tested properties, in comparison with the formula containing pure mixing water.

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Sinthaworn, Suppachai. "Water Penetration Resistance of Fly Ash Concrete Incorporating with Quarry Wastes." Materials Science Forum 886 (March 2017): 159–63. http://dx.doi.org/10.4028/www.scientific.net/msf.886.159.

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Slump of fresh concrete, compressive strength and water penetration depth under pressure of fly ash concrete incorporate with quarry waste as fine aggregate were investigated. The cementitious materials of the concrete includes ordinary Portland cement 80% and fly ash 20% by weight of cementitious. The mix proportions of the concrete were set into two classes of compressive strength. The results show that fly ash enhances workability of both concretes (normal concrete and concrete incorporate with quarry waste). Increasing the percentage of quarry dusts as fine aggregate in concrete seem negligible effect on the compressive strength whereas adding fly ash shows a slightly improve the compressive strength in the case of cohesive concrete mixture. Besides, adding the suitable amount of fly ash could improve the permeability of concrete. Therefore, fly ash could be a good admixture to improve the water resistant of normal strength concrete and also could be a supplemental material to improve the compressive strength of normal high strength concrete.

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Aiello, M. A., and F. Leuzzi. "Waste tyre rubberized concrete: Properties at fresh and hardened state." Waste Management 30, no. 8-9 (2010): 1696–704. http://dx.doi.org/10.1016/j.wasman.2010.02.005.

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Katzer, Jacek, Jacek Halbiniak, Bogdan Langier, Maciej Major, and Izabela Major. "Influence of Varied Waste Ceramic Fillers on the Resistance of Concrete to Freeze–Thaw Cycles." Materials 14, no. 3 (2021): 624. http://dx.doi.org/10.3390/ma14030624.

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Our research focused on the influence of fillers obtained from crushed waste materials on the selected properties of concrete composites. The used waste materials were sourced from the production of ceramic tiles, ceramic pots, and sanitary ceramics. We evaluated concretes modified with the addition of 10% (by mass of cement) of different fillers. The properties, including the air content in the fresh concrete mix, consistency, compressive strength, and freeze-thaw resistance were examined. The evaluation of the freeze-thaw resistance was carried out by testing the concrete with the direct method for 150 cycles of freezing and thawing. The characteristics of the concrete porosity structure were assessed using automated digital image analysis. Concretes modified by coarse and fine fillers were characterized by different improvements in the mechanical properties and resistance to cycles of freezing and thawing. Composites with the addition of coarse fillers did not show any significant changes in comparison to the control concrete. An automated digital image analysis of the pore distribution in concrete proved to be an effective tool for the assessment of the freeze–thaw resistance of the concretes in question.

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Rashidi, Maria, Alireza Joshaghani, and Maryam Ghodrat. "Towards Eco-Flowable Concrete Production." Sustainability 12, no. 3 (2020): 1208. http://dx.doi.org/10.3390/su12031208.

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Environmental concerns have increased due to the amount of unused/expired plastic medical waste generated in hospitals, laboratories, and other healthcare facilities, in addition to the fact that disposing of such wastes with extremely low degradation levels causes them to remain in the environment for extended periods of time. These issues have led researchers to develop more environmentally friendly alternatives for disposing of plastic medical waste in Australia. This study is an attempt to assess the impacts of using expired plastic syringes as fine aggregate on fresh and hardened characteristics of flowable concrete, which might provide a solution to environmental concerns. Six mixtures of flowable concrete with water-to-cement ratios of 0.38 were studied. It was found that using recycled aggregate in up to 20% can improve the workability and increase the V-funnel values of flowable concrete mixtures. However, using waste aggregates in more than 30% caused an inapt flowability. Adding waste aggregate at the 30%–50% replacement level led to a decrease in the L-box ratio. To verify the utility and the efficacy of this experiment, the connections between different rheological test measurements were also compared by implementing the Pearson correlation function. The mechanical properties of the mixes containing recycled aggregates were decreased at the age of seven days; however, at later ages, waste aggregates increased the strength at the 10%–30% replacement levels.

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Shober Saheb Alyhya, Wajde, Shober Saheb Alyhya Alaa Abed Alameer, Laith Mohammed Ridha Mahmmod, and . "Experimental Investigation on Self-Compacting Concrete with Waste Carbon Black." International Journal of Engineering & Technology 7, no. 4.20 (2018): 414. http://dx.doi.org/10.14419/ijet.v7i4.20.26233.

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One of the vital aspects in designing self-compacting concrete (SCC) is the amount and type of filler with respect to cement and water. These have a great impact not only on fresh SCC properties (segregation, filling, fluidity, etc.) but also on its hardened properties. In this experimental study, an attempt was conducted to diminish the pores occurrence in SCC by using carbon black as a filler, which is a waste from the rubber industry. The experimental work investigates the SCC properties when crusher dust filler from the aggregate plant was partially replaced by waste carbon black. SCC mixes of two carbon black replacement ratios (2.5% and 5%) were studied to reveal its effect on the fresh and hardened properties, through various tests. The fresh properties were investigated by means of slump flow (t500), J-ring and L-box. The compressive and splitting tensile strengths tests were implemented along with the mix density evaluation to characterize the hardened properties of SCC with black carbon. It has been found that the carbon black has a useful role for the fresh properties of SCC. Indeed, the carbon black provides superior performance for the compressive strength development than crusher dust. In contrast, it slightly worsened SCC splitting tensile strength.

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Rai, Baboo, S. Tabin Rushad, Bhavesh Kr, and S. K. Duggal. "Study of Waste Plastic Mix Concrete with Plasticizer." ISRN Civil Engineering 2012 (May 17, 2012): 1–5. http://dx.doi.org/10.5402/2012/469272.

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The fresh and hardened properties of waste virgin plastic mix concrete have been studied (CUR Report 1991). A number of concrete mixes were prepared in which sand was partially replaced by waste plastic flakes in varying percentages by volume. Waste plastic mix concrete with and without superplasticizer was tested at room temperature. Forty-eight cube samples were moulded for compressive strength tests at three, seven, and twenty-eight days. Eight beams were also cast to study the flexural strength characteristic of waste plastic mix concrete. It was found that the reduction in workability and compressive strength, due to partially replacement of sand by waste plastic, is minimal and can be enhanced by addition of superplasticizer.

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Hama, Sheelan M., Alhareth M. Abdulghafor, and Mohammed Tarrad Nawar. "Fresh, Mechanical Properties and Impact Resistance Behavior of Eco-Friend Self-Compacted Concrete." Al-Nahrain Journal for Engineering Sciences 22, no. 3 (2019): 208–12. http://dx.doi.org/10.29194/njes.22030208.

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In this work, waste glass powder from broken windows and plastic fibers from waste polyethylene terephthalate bottles are utilized to produce an economical self-compact concrete. Fresh properties (slump flow diameter, slump Flow T50, V. Funnel, L–Box), mechanical properties (Compressive strength and Flexural strength) and impact resistance of self-compact concrete are investigated. 15% waste glass powder as a partial replacement of cement with five percentages of polyethylene terephthalate plastic waste were adopted: 0% (reference), 0.5%, 0.75%, 1%, 1.25% and 1.5% by volume. It seems that the flow ability of self-compact concrete decreases with the increasing of the amount of plastic fibers. The compressive strength was increased slightly with plastic fiber content up to (0.75%), about 4.6% For more than (0.75%) plastic fiber. The compressive strength began to decrease about 15.2%. The results showed an improvement in flexural strength and an impact on the resistance in all tested specimens’ content of the plastic fibers, especially at (1.5%) fibers.

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Vijayalakshmi, M., A. S. S. Sekar, M. Sivabharathy, and G. Ganesh Prabhu. "Utilization of Granite Powder Waste in Concrete Production." Defect and Diffusion Forum 330 (September 2012): 49–61. http://dx.doi.org/10.4028/www.scientific.net/ddf.330.49.

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The ornamental granite stone-processing industries of Tamilnadu state produce tons of fine powder wastes during sawing and polishing. It is a non-biodegradable waste that can be easily inhaled by human being and animals and is also harmful to the environment. The main objective of this study is to investigate experimentally the suitability of granite powder (GP) waste as a substitute material for fine/natural aggregate in concrete production. The physical and chemical characterization of the GP waste was also addressed. The experimental parameter was the percentage of granite powder substitution. The cubes and cylinders were prepared using 0%, 5%, 10%, 15%, 20% and 25% of fine/natural aggregate substituted by GP waste. To understand fully the influence of GP waste on the behavior of concrete, several tests such as density, slump cone, split tensile strength, flexural strength; ultra sonic pulse velocity (UPV) and compressive strength tests were performed. The Young’s modulus of elasticity of the concrete was also determined. The GP waste exhibited a very high specific surface value of about 340kg/m2 and chemical analysis results showed that the examined material contains about 77% of silica (SiO2). Experimental results revealed that the rough texture and high specific area of the GP waste significantly decreased the workability of the concrete especially for the substitution level of 20% and 25%. The obtained test results show that the substitution of GP waste up to 15% does not affect the mechanical and fresh concrete properties of the concrete and it was recommended that the replacement of natural sand by GP waste up to 15% of any formulation would be favorable for concrete making.

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Belebchouche, Cherif, Karim Moussaceb, Salah-Eddine Bensebti, Abdelkarim Aït-Mokhtar, Abdelkader Hammoudi, and Slawomir Czarnecki. "Mechanical and Microstructural Properties of Ordinary Concrete with High Additions of Crushed Glass." Materials 14, no. 8 (2021): 1872. http://dx.doi.org/10.3390/ma14081872.

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This study investigates the use of crushed glass waste as partial cement replacement in ordinary concretes. Six concrete mixes were designed and prepared: a reference without substitution and five substitution percentages of crushed glass waste ranging from 5% to 25%. The made concrete mix design underwent different tests, namely: slump test, mechanical strength, thermogravimetric analysis (TGA), X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET) determination and finally, water porosimetry, in order to evaluate the influence of the use of crushed glass waste on the properties of fresh and hardened concrete. Mechanical strengths results show that the use of 15% of the crushed glass waste improves the mechanical strength. TGA analysis confirms this result by highlighting a higher hydration degree. The latter contributes to the reduction of the porosity and, consequently, the mechanical strength increases. Also, it can be caused by the increasing amount of chromium which, if added a little, accelerates the hydration of C3S and leads to an increase of the mechanical strength. The BET technique and porosimetry tests showed that the use of crushed glass waste reduces the global porosity of concrete. This is due to the filling effect of the glass powder.

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Rughooputh, Reshma, Jaylina Oogarah Rana, and Kishan Joorawon. "Possibility of using fresh concrete waste in concrete for non structural civil engineering works as a waste management strategy." KSCE Journal of Civil Engineering 21, no. 1 (2016): 94–99. http://dx.doi.org/10.1007/s12205-016-0052-1.

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Azmi, Ahmad Azrem, Mohd Mustafa Al Bakri Abdullah, Che Mohd Ruzaidi Ghazali, Andrei Victor Sandu, Kamarudin Hussin, and Donny Arief Sumarto. "A Review on Fly Ash Based Geopolymer Rubberized Concrete." Key Engineering Materials 700 (July 2016): 183–96. http://dx.doi.org/10.4028/www.scientific.net/kem.700.183.

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Utilization of waste materials such as waste tire rubber in the building industry can help prevent environmental pollution whilst contributing to the design of more economical buildings. Preliminary studies show that workable rubberized portland cement concrete mixtures can be made provided that appropriate percentages of tire rubber are used in such mixtures. This article provides the overview of some of published paper using tire waste rubber in portland cement concrete. The researchers mostly investigated the properties of fresh and hardened concrete. The workability, density, air content, unit weight, compressive strength, modulus of elasticity, freezing and thawing resistance, abrasion resistance and thermal properties of the waste tire rubber in concrete were discussed.

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Bolat, Hakan, and Pınar Erkus. "Use of polyvinyl chloride (PVC) powder and granules as aggregate replacement in concrete mixtures." Science and Engineering of Composite Materials 23, no. 2 (2016): 209–16. http://dx.doi.org/10.1515/secm-2014-0094.

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AbstractConcrete is one of the materials in which polymer wastes are utilized. Generally, these wastes are added at specific rates in scientific studies but an important problem of waste polymers is size irregularity. Even when consistent dosage rates are used, variations in polymer size can lead to variability in the physical and mechanical properties of the concrete produced. The aim of this study is to determine physical and mechanical properties of polyvinyl chloride (PVC)-containing concretes. In order to produce normal and high strength concretes, 10%, 20%, and 30% replacement ratios of PVC powder and granules by volume of aggregate are used. Slump, fresh and hardened densities, compressive strength, capillary water absorption, and abrasion were tested on all concrete types. As the PVC ratio increases, important changes are seen in all physical and mechanical concrete properties. The unit weights of the 10%, 20%, and 30% replacement PVC powder concretes are lower by ∼4%, 8%, and 13%, respectively, as compared to the reference mixtures, and the replacement PVC granule concretes are lower by ∼2%, 4%, and 7%. Compressive strength test results showed similar trends. As PVC replacement increases, the capillary water absorption decreases between 10% and 50%, and abrasion decreases between 27% and 77%.

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Kazaz, Aynur, Serdar Ulubeyli, Bayram Er, Volkan Arslan, Murat Atici, and Ahmet Arslan. "Fresh Ready-Mixed Concrete Waste in Construction Projects: A Planning Approach." Organization, Technology & Management in Construction: An International Journal 7, no. 2 (2015): 1280–88. http://dx.doi.org/10.5592/otmcj.2015.2.2.

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As’ad, Sholihin, Purnawan Gunawan, and M. Syarif Alaydrus. "Fresh State Behavior of Self Compacting Concrete Containing Waste Material Fibres." Procedia Engineering 14 (2011): 797–804. http://dx.doi.org/10.1016/j.proeng.2011.07.101.

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Kazaz, Aynur, Serdar Ulubeyli, Bayram Er, Volkan Arslan, Ahmet Arslan, and Murat Atici. "Fresh Ready-mixed Concrete Waste in Construction Projects: A Planning Approach." Procedia Engineering 123 (2015): 268–75. http://dx.doi.org/10.1016/j.proeng.2015.10.088.

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Jain, Abhishek, Salman Siddique, Trilok Gupta, Sudhir Jain, Ravi K. Sharma, and Sandeep Chaudhary. "Fresh, Strength, Durability and Microstructural Properties of Shredded Waste Plastic Concrete." Iranian Journal of Science and Technology, Transactions of Civil Engineering 43, S1 (2018): 455–65. http://dx.doi.org/10.1007/s40996-018-0178-0.

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Sua-Iam, Gritsada, and Natt Makul. "Use of Limestone Powder to Improve the Properties of Self-Compacting Concrete Produced Using Cathode Ray Tube Waste as Fine Aggregate." Applied Mechanics and Materials 193-194 (August 2012): 472–76. http://dx.doi.org/10.4028/www.scientific.net/amm.193-194.472.

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This paper presents the effect of added limestone powder (LS) on the fresh and cured properties of self-compacting concrete (SCC) containing cathode ray tube glass waste. The concrete was produced using ordinary Portland cement at a water-cement (W/C) ratio of 0.38 by weight. CRT glass waste cullet was incorporated in river sand in proportions of 20 or 40%. To suppress potential viscosity effects limestone powder was added at levels of 5, 10, or 15% by weight. The slump flow time, slump flow diameter, V-funnel flow time, Marsh cone flow time, and setting time of the fresh concrete were tested, as well as the compressive strength and ultrasonic pulse velocity of the hardened concrete. The slump flow, V-funnel flow time, and Marsh cone flow increased with increasing limestone powder content, while the compressive strength and ultrasonic pulse velocity decreased. The results demonstrate that it is feasible to use limestone powder to produce SCC containing CRT glass waste as a fine aggregate replacement.

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Ali, Rashid, and Roszilah Hamid. "Workability and Compressive Strength of Recycled Concrete Waste Aggregate Concrete." Applied Mechanics and Materials 754-755 (April 2015): 417–20. http://dx.doi.org/10.4028/www.scientific.net/amm.754-755.417.

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Concrete waste from construction site such as pile waste and tested concrete cubes waste is quite a problem for the contractor to dispose of. This waste is currently being buried or dumped illegally at a certain area, which lead to environmental pollution issue and waste of construction materials. In this study, concrete cubes waste from a concrete testing laboratory is crushed and recycled as natural coarse aggregate (NA) replacement (0% - control, 30% and 50% by mass) in grade 15, 25 and 40 concrete. The recycled concrete waste aggregate (RCWA) was tested for grading, specific gravity, percent absorption and impact and crushing (% crushed). For the fresh concrete mix, slump and compaction factor test were carried out. Concrete samples are wet cured and tested at 7 and 28 days for compressive strength. Results show that the workability of RCWA concrete reduce as the content of RCWA increase in the mix as the water absorption of RCWA is higher than the NA. The compressive strength of the RCWA concrete is acceptable at all RCWA replacement for grade 15 and 25 concrete with strengths higher than the design values of 15 and 25 MPa. For grade 40 concrete, the optimum RCWA replacement is at 30% and at 50% replacement, the compressive strength of the RCWA concrete is lower than the design value of 40 MPa. 50% replacement of NA with RCWA works well for grade 15 and 25 concrete, but for higher concrete grade (C40), the limiting value of replacement is 30%.

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Kumar Hindu, Aneel, Tauha Hussain Ali, and Agha Faisal Habib. "Effect of length of steel fibers of waste tires on splitting tensile strength of concrete." MATEC Web of Conferences 276 (2019): 01003. http://dx.doi.org/10.1051/matecconf/201927601003.

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The increase in volume of vehicles ultimately increases the number of waste tires. The proper disposal or reutilization of waste tires is a challenge. This study is aimed to utilize the steel fibers of waste tires as reinforcement in concrete. Concrete cylinders were cast with addition of different percentages of steel fibers (0-2%) and length (10-20 mm). The fresh and hard properties of concrete reinforced with different percentages of steel fibers and lengths were observed. It is seen that splitting tensile strength of concrete increased with increase in the length of fiber and with the increase in the percentage of fiber. The inclusion of the fibers in concrete causes the reduction in the workability of concrete.

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Rabihati, Etty, Rasiwan Rasiwan, and Deny Syahrani. "Karakteristik Beton Scc (Self Compactibility Concrete) dengan menggunakan Limbah Kaca dan Limbah Bauksit sebagai Bahan Tambah." Jurnal Vokasi 15, no. 2 (2021): 50–56. http://dx.doi.org/10.31573/vokasi.v15i2.157.

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The use of SCC (Self Compactibility Concrete) concrete in Indonesia is increasing in the field, especially for a variety of buildings that require large compaction speeds or use concrete that can compact itself. SCC Concrete Technology in the construction industry is growing, especially in meeting the needs of the construction world. Added material is an alternative material used to increase the strength characteristics of the concrete. Likewise the addition of glass powder waste, and bauxite waste in making SCC concrete is expected to increase the compressive strength concrete. Fresh concrete, which belongs to the self-compacting concrete (SCC) group, has a very high slump value (more than 20 cm), so measurements with cone abrams are no longer effective. The use of these materials as substitute materials and added based on the thought to utilize glass waste and , bauxite waste in order to reduce the impact of environmental pollution and provide economic value. This study uses glass powder as glass waste and bauxite waste as added material for cement. This study uses four kinds of mixed compositions, namely 0% (ordinary concrete); 2.5% mixture; 5% and 7.5% by weight of cement as added material from glass waste and bouksit waste, where each composition consists of 3 cylindrical specimens with a diameter of 15 cm and a height of 30 cm. Until now there has never been any research from mananpun to test the 2 (two) mixtures, therefore we want to test it so that glass waste and bauxite waste are not wasted and can be reused, especially in making SCC concrete. From the research results it was found that the maximum slum cone test results were in the 2.5% variation that is equal to 44.3 cm, while the minimum at 0% was 29.3 cm. The maximum compressive strength at the age of 3 days is 455,418 kg / cm2 for variations of 7.5% while the minimum is at a variation of 2.5% of 200.469 kg / cm2 at 7 days of concrete.

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Syarif, M., and M. W. Tjaronge. "A Comparison of Organic Cement Made from Recycled Waste Material and Portland Cement." Engineering, Technology & Applied Science Research 11, no. 4 (2021): 7442–45. http://dx.doi.org/10.48084/etasr.4323.

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Organic cement is an environmentally friendly alternative to Portland cement which is acquired by recycled organic waste and Mediterranean soil. Waste management is a global problem. The physical characteristic test results of the organic cement show that the weight test of fresh organic concrete is 2081kg/m³ and the dry weight of concrete is 2032kg/m³ which are smaller than Portland cement concrete's which are 2525kg/m³ and 2405 kg/m³ respectively. The fineness of alternative cement grains that passed the 200 mesh sieve is 56%, which is more than Portland cement's which is 52%. The solid weight of alternative cement is 1200kg/m3 whereas the solid weight of Portland cement is 1250kg/m3.

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Sérifou, Mamery, Z. M. Sbartaï, S. Yotte, M. O. Boffoué, E. Emeruwa, and F. Bos. "A Study of Concrete Made with Fine and Coarse Aggregates Recycled from Fresh Concrete Waste." Journal of Construction Engineering 2013 (August 26, 2013): 1–5. http://dx.doi.org/10.1155/2013/317182.

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This paper deals with the possibility of using fresh concrete waste as recycled aggregates in concrete. An experimental program based on two variables (proportion of fine aggregates replacement and proportion of coarse aggregates replacement) was implemented. The proportions of replacement were 0%, 50%, and 100% by mass of aggregates. Several mechanical properties were tested as compressive and tensile strengths. The results show a good correlation between aggregates replacement percentage and concrete properties. Concerning mechanical properties, a gradual decrease in compressive, splitting, and flexural strengthn with the increase in recycled aggregate percentage is shown.

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Ahmed, Ghafur H., Hawreen Ahmed, Babar Ali, and Rayed Alyousef. "Assessment of High Performance Self-Consolidating Concrete through an Experimental and Analytical Multi-Parameter Approach." Materials 14, no. 4 (2021): 985. http://dx.doi.org/10.3390/ma14040985.

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High-performance self-consolidating concrete is one of the most promising developments in the construction industry. Nowadays, concrete designers and ready-mix companies are seeking optimum concrete in terms of environmental impact, cost, mechanical performance, as well as fresh-state properties. This can be achieved by considering the mentioned parameters simultaneously; typically, by integrating conventional concrete systems with different types of high-performance waste mineral admixtures (i.e., micro-silica and fly ash) and ultra-high range plasticizers. In this study, fresh-state properties (slump, flow, restricted flow), hardened-state properties (density, water absorption by immersion, compressive strength, splitting tensile strength, flexural strength, stress-strain relationship, modulus of elasticity, oven heating test, fire-resistance, and freeze-thaw cycles), and cost of high-performance self-consolidating concrete (HPSCC) prepared with waste mineral admixtures, were examined and compared with three different reference mixes, including normal strength-vibrated concrete (NSVC), high-strength self-compacted concrete (HSSCC), and high-performance highly-viscous concrete (HPVC). Then, a multi parameter analytical approach was considered to identify the optimum concrete mix in terms of cost, workability, strength, and durability.

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Grinys, Audrius, Muthaiah Balamurugan, Algirdas Augonis, and Ernestas Ivanauskas. "Mechanical Properties and Durability of Rubberized and Glass Powder Modified Rubberized Concrete for Whitetopping Structures." Materials 14, no. 9 (2021): 2321. http://dx.doi.org/10.3390/ma14092321.

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This paper analyzes concrete fine aggregate (sand) modification by scrap tire rubber particles-fine crumb rubber (FCR) and coarse crumb rubber (CCR) of fraction 0/1 mm. Such rubberized concrete to get better bonding properties were modified by car-boxylated styrene butadiene rubber (SBR) latex and to gain the strength were modified by glass waste. The following tests—slump test, fresh concrete density, fresh concrete air content, compressive strength, flexural strength, fracture energy, freezing-thawing, porosity parameter, and scanning electron microscope—were conducted for rubberized concretes. From experiments, we can see that fresh concrete properties decreased when crumb rubber content has increased. Mostly it is related to crumb rubber (CR) lower specific gravity nature and higher fineness compared with changed fine aggregate-sand. In this research, we obtained a slight loss of compressive strength when CR was used in concrete However, these rubberized concretes with a small amount of rubber provided sufficient compressive strength results (greater than 50 MPa). Due to the pozzolanic reaction, we see that compressive strength results after 56 days in glass powder modified samples increased by 11–13% than 28 days com-pressive strengths, while at the same period control samples increased its compressive strength about 2.5%. Experiments have shown that the flexural strength of rubberized concrete with small amounts of CR increased by 3.4–15.8% compared to control mix, due the fact that rubber is an elastic material and it will absorb high energy and perform positive bending toughness. The test results indicated that CR can intercept the tensile stress in concrete and make the deformation more plastic. Fracturing of such conglomerate concrete is not brittle, there is no abrupt post-peak load drop and gradually continues after the maximum load is exceeded. Such concrete requires much higher fracture energy. It was obtained that FCR particles (lower than A300) will entrap more micropores content than coarse rubbers because due to their high specific area. Freezing-thawing results have confirmed that Kf values can be conveniently used to predict freeze-thaw resistance and durability of concrete. The test has shown that modification of concrete with 10 kg fine rubber waste will lead to similar mechanical and durability properties of concrete as was obtained in control concrete with 2 kg of prefabricated air bubbles.

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Hossain, MB, P. Bhowmik, and KM Shaad. "Use of waste plastic aggregation in concrete as a constituent material." Progressive Agriculture 27, no. 3 (2016): 383–91. http://dx.doi.org/10.3329/pa.v27i3.30835.

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The amount of Plastics consumed annually has been growing increasingly in Bangladesh. Consequently, waste plastic recycling has become one of the major challenges in recent times. The present study has selected waste PET, a polymer compound of Polyethylene Terephthalate, to investigate its possible use as plastic aggregate in concrete application. The shredded waste plastic was used in concrete with partial replacement of 5%, 10% and 20% by volume of conventional coarse aggregate. Four types of concrete specimens including one without plastic aggregate, for comparison purpose, were prepared. All the concrete specimens were tested for its different mechanical properties after a curing period of 7, 21 and 28 days. Various physical properties of all aggregates and fresh concrete properties were also tested in the laboratory. The specific gravity of waste plastic aggregate was found 1.4 and the maximum density of concrete containing plastic aggregate was 115 lb/ft3. The density of concrete specimens containing plastic aggregate decreased with the addition of more amount of plastic aggregate. It was found that the concrete specimen containing waste PET at 10% volume showed higher compressive strength and higher modulus of elasticity than other specimens. The splitting tensile strength was about 8-11% of compressive strength. The flexural strength of concrete specimens containing plastic aggregate was lower than that of concrete without plastic aggregate. It was found that the strength of concrete containing PET aggregate falls in the category of lightweight concrete in terms of their strength, specific gravity and density. Thus, the waste PET aggregate could be effectively used to reduce the unit weight of concrete which results in a reduction in the dead weight of a structural concrete. Furthermore, it is concluded that the use of waste PET in concrete provides some advantages such as reduction in the use of conventional aggregate, disposal of wastes, prevention of environmental pollution, and energy saving.Progressive Agriculture 27 (3): 383-391, 2016

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Drzymała, Tomasz, Bartosz Zegardło, and Piotr Tofilo. "Properties of Concrete Containing Recycled Glass Aggregates Produced of Exploded Lighting Materials." Materials 13, no. 1 (2020): 226. http://dx.doi.org/10.3390/ma13010226.

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The paper presents an analysis of the possibilities of using glass waste from recycled lighting materials as aggregates for cement concrete. The research material was obtained from a company that utilizes electrical waste. Glass from pre-sorted elements was transported to the laboratory and crushed in a drum crusher. In this way, the aggregate obtained was subjected to the basic tests that are carried out for aggregates traditionally used in construction. The specific density of aggregate, bulk density, absorbability, crushing index, grain shape, texture type and aggregate flatness index were examined. In the next stage of research work, concrete mixtures were made in which crushed aggregate from crushed fluorescent lamps was used as a substitute for gravel aggregate. Mixtures containing 10%, 30%, 50% and 100% aggregate were made. A mixture containing only sand and gravel aggregate was made as a comparative mixture. Basic tests of both fresh concrete mix and hardened concrete were carried out for all concrete made. The consistency of the fresh concrete mix, the air content in the concrete mix, the density of hardened concrete, absorbability, water permeability under pressure and the basic compressive and tensile (flexular) strength tests were performed. The test results showed that the greater the addition of recycled glass aggregate, the less advantageous are the features of the concrete obtained with its participation. Microscopic analyses carried out in order to explain this phenomenon indicated an unfavorable influence of the grain shape of the aggregate thus obtained. Despite this fact, recycling of lighting waste in concrete composites is recommended as a pro-ecology measure; however, attention was paid to the benefits of using only 30% by mass of said waste in relation to the weight of the traditional aggregate used. Composite with such a quantity of waste retained the characteristics of cement concrete, which qualified its use for construction concrete.

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Kore, Sudarshan Dattatraya. "Feasibility Study on Use of Plastic Waste as Fine Aggregate in Concrete Mixes." Journal of Building Material Science 1, no. 1 (2019): 26. http://dx.doi.org/10.30564/jbmr.v1i1.1204.

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Plastic is used in many forms in day-to-day life. Since Plastic is non-biodegradable, landfills do not provide an environment friendly solution. Hence, there is strong need to utilize waste plastic. This creates a large quantity of garbage every day which is unhealthy and pollutes the environment. In present scenario solid waste management is a challenge in our country. The production of solid waste is increasing day to day and causes serious concerns to the environment. In this study, the recycled plastics are used in the concrete as a partial replacement of fine aggregate in concrete. The main purpose of this study is to investigate the mechanical properties of concrete such as workability, compressive, flexural and split tensile strengths of concrete mixes with partial replacement of conventional fine aggregate with aggregate produced from plastic waste. The use of plastic aggregate as replacement for fine aggregate enhances workability and fresh bulk density of concrete mixes. The mechanical properties of concrete such as compressive, flexural, and tensile strengths of concrete reduced marginally up to 10% replacement levels.Plastic is used in many forms in day-to-day life. Since Plastic is non-biodegradable, landfills do not provide an environment friendly solution. Hence, there is strong need to utilize waste plastic. This creates a large quantity of garbage every day which is unhealthy and pollutes the environment. In present scenario solid waste management is a challenge in our country. The production of solid waste is increasing day to day and causes serious concerns to the environment. In this study, the recycled plastics are used in the concrete as a partial replacement of fine aggregate in concrete. The main purpose of this study is to investigate the mechanical properties of concrete such as workability, compressive, flexural and split tensile strengths of concrete mixes with partial replacement of conventional fine aggregate with aggregate produced from plastic waste. The use of plastic aggregate as replacement for fine aggregate enhances workability and fresh bulk density of concrete mixes. The mechanical properties of concrete such as compressive, flexural, and tensile strengths of concrete reduced marginally up to 10% replacement levels.

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Kassed, Ghadeer Jabbar, and Sura Kareem Ali. "Reuse of Glass waste as a partial replacement to fine aggregates in concrete." Journal of Engineering 27, no. 8 (2021): 43–58. http://dx.doi.org/10.31026/j.eng.2021.08.04.

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As human societies grow, the problem of waste management becomes one of the pressing issues that need to be addressed. Recycling and reuse of waste are effective waste management measures that prevent pollution and conserve natural resources. In this study, the possibility of using glass waste as an alternative was used as a partial weight substitute for fine aggregates with replacement ratios of 10, 20, 30, and 40% by the weight, and formed into test models (15 cm * 15 cm ) cube and (15 cm * 30 cm) cylinder, then matured and tested their strength compression and tensile strength at the age of 7 and 28 days and compared with a reference or conventional concrete with a mixing ratio (1: 1.5: 3) as well as testing its workability on fresh concrete. The results showed the possibility of using crushed glass wastes in concrete as a good alternative to fine aggregates, up to 30%. The compressive strength and tensile strength results at this ratio were 92.6% and 80.86% at the age of 28 days, respectively.

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Rodríguez, A., Pablo Luis Campos, J. Garabito, Juan García, and Isabel Santamaría. "Manufacture of High-Performance Concrete Made with Powdered Polyester Resin Waste and Carboxylic-Ester Based Superplasticizer." Advanced Materials Research 1129 (November 2015): 523–29. http://dx.doi.org/10.4028/www.scientific.net/amr.1129.523.

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A high-performance concrete design is presented that incorporates powdered polyester resin waste as a fine aggregate material in partial substitution of sand, with additions of both a superplasticizer based on carboxylic ethers and silica fume. The potential application of the powdered polyester resin and its properties as an aggregate are both analysed as well as the mechanical behaviour, in both the fresh and the hardened states, of the concrete. Both the flexural and the compressive strength of the concrete were shown to depend on the amount of waste used in substitution of the sand. The results of the research show that the designed concrete reaches the resistances of a high performance concrete with values above 50 MPa. On the other hand, the rest of its properties are equivalents, both in the fresh and hardened state, proportional to the amount of powdered polyester resin that is added. However, to achieve this, the use of superplasticizers additives and admixtures of silica fume is necessary.

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Malkapur, Santhosh M., Ashish Anand, Amit Prakash Pandey, Alok Ojha, Nimesh Mani, and Narasimhan Chandrashekara Mattur. "Effect of Mix Parameters on the Strength Performance of Waste Plastics Incorporated Concrete Mixes." Journal of Structures 2014 (December 4, 2014): 1–8. http://dx.doi.org/10.1155/2014/389014.

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Disposal of solid wastes has been a major problem all over the world. Out of all the different types of solid wastes, the major challenge of disposal is posed by the ever increasing volumes of plastic wastes. While several methods are in practice, producing newer useful materials by recycling of such plastic wastes is, by far, the best method of their disposal. One such possible method is to use the waste plastics as an ingredient in the production of the concrete mixes in the construction industry. The present study aims to investigate the relative contributions of the various mix parameters to the mechanical properties of concrete mixes produced with waste plastics as partial replacement (10–30% by volume) to coarse aggregates. Initially, strength test results of a set of trial mixes, selected based on Taguchi’s design of experiments (DOE) method are obtained. A detailed analysis of the experimental results is carried out to study the effect of using waste plastics as a partial replacement to coarse aggregates on the strength parameters of these concrete mixes. It is found that all these trial mixes have performed satisfactorily in terms of workability in the fresh state and strength properties in their hardened state.

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Choi, Hong-Beom, Jin-O. Park, Tae-Hyun Kim, and Kyeo-Re Lee. "Mechanical Properties of Basalt-Based Recycled Aggregate Concrete for Jeju Island." Materials 14, no. 18 (2021): 5429. http://dx.doi.org/10.3390/ma14185429.

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Recycled aggregate is essential to protect Jeju Island’s natural environment, but waste concrete, including porous basalt, is a factor that lowers the quality of recycled aggregate. Therefore, an experiment was conducted to analyze the properties of concrete application of basalt-based recycled aggregate (B-RA) through quality improvement. The absorption of the B-RA ranged from 3–5%; restricting its absorption to less than 3% was challenging owing to its porosity and irregular shape. However, the increase in the solid volume percentage of the concrete when replacing 25 or 50% of fresh basalt aggregate with recycled basalt aggregate improved the mechanical performance of the concrete, especially at 25%, for which a compressive strength of 55.9 MPa and modulus of elasticity of 25.9 GPa exceeded those of concrete with fresh basalt aggregate. Moreover, increasing the replacement ratio of the fresh basalt with recycled aggregate reduced the slump and decreased the air content, consequently increasing the concrete drying shrinkage. However, the replacement of fresh basalt aggregate with recycled basalt aggregate unaltered the mechanical performance of the concrete. The results indicate that efficient use of recycled aggregates can yield superior performance to that of fresh basalt, irrespective of aggregate quality.

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Mambeli Barros, Regina, Fernando Batista Pinto, Rômulo Carvalho de Brito, Gilbert Silva, Geraldo Lúcio Tiago Filho, and Fernando das Graças Braga da Silva. "Study of the Properties of Concrete Containing Waste Foundry Sand as Part of the Aggregate." Advanced Materials Research 838-841 (November 2013): 131–36. http://dx.doi.org/10.4028/www.scientific.net/amr.838-841.131.

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The foundry industry has greatly increased in many parts of the world, and their generation of enormous amounts of waste foundry sand is a major environmental concern. Such waste may be classified as hazardous, requiring special precautions for its management, which may include disposal in landfills for hazardous waste. However, this waste can be used as a partial substitute for the sand in a concrete aggregate. Slump flow, water absorption, concrete compression strength, and index void tests were performed to study the properties of fresh and hardened concrete made by substituting 10% and 20% of the sand by weight with foundry sand as concrete aggregate. Image analysis by optical microscopy was also performed in the present study. The results showed that the replacement of the waste foundry sand is technically feasible under the conditions studied and that both the substitutions studied increase the compression strength of the concrete.

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Bheel, Naraindas, Samiullah Sohu, Paul Awoyera, Ashok Kumar, Suhail Ahmed Abbasi, and Oladimeji B. Olalusi. "Effect of Wheat Straw Ash on Fresh and Hardened Concrete Reinforced with Jute Fiber." Advances in Civil Engineering 2021 (January 13, 2021): 1–11. http://dx.doi.org/10.1155/2021/6659125.

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In the present era, a number of researchers are using either industrial or agricultural priceless products as a basic source of raw materials for the construction industry. These waste products are economical and helpful in producing a sustainable environment and reducing environmental pollution, which is called handling waste products. However, this research work was conducted on concrete containing 0.25%, 0.50%, 0.75%, and 1% of jute fiber as reinforcement material and 10%, 20%, 30%, and 40% of wheat straw ash (WSA) as replacement for fine aggregates. Moreover, the separate and combined effect of jute fiber and WSA as a replacement for sand ingredient in concrete is to determine the fresh and hardened properties of concrete. In this research, a number of concrete samples were prepared with 1 : 1.5 : 3 mix proportion at 0.54 water-cement ratio and cured at 28 days. The experimental outcomes displayed that the compressive, splitting tensile, and flexural strengths improved by 32.88 MPa, 3.80 MPa, and 5.30 MPa at 0.50% of jute fiber along with 30% of WSA at 28 days consistently. Similarly, the modulus of elasticity was developed while the dosages of jute fiber and WSA increased together in concrete. Moreover, the permeability and workability of concrete were reduced while utilized jute fiber and WSA increased together in concrete.

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Qudoos, Abdul, In Kyu Jeon, Seong Soo Kim, Jeong Bae Lee, and Hong Gi Kim. "Utilization of Waste Polysilicon Sludge in Concrete." Materials 13, no. 1 (2020): 251. http://dx.doi.org/10.3390/ma13010251.

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Increasing use of cement in the construction industry is causing an alarming increase in carbon dioxide (CO2) emissions, which is a serious environmental threat, it can be reduced by the addition of supplementary cementitious materials (SCMs). The commonly used SCMs like ground granulated blast furnace slag (GGBS), metakaolin (MK) and fly ash (FA) have been successfully used to replace the cement partially or completely. Polysilicon sludge obtained from the photovoltaic industry is also a type of waste material that can be used as SCM because it has high content of reactive SiO2. This study investigates the effects of replacing cement with polysilicon sludge in concrete. Different concrete specimens were made by replacing varying proportions of cement with polysilicon sludge and their properties, such as, fresh properties, compressive strength, heat release, chloride penetration, freeze/thaw resistance and microstructural investigations were determined. The results demonstrate that the polysilicon sludge can be used effectively to replace cement, and environmental threats associated with its disposal can be reduced.

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Senthil Kumar, K., and K. Baskar. "Response Surfaces for Fresh and Hardened Properties of Concrete with E-Waste (HIPS)." Journal of Waste Management 2014 (September 25, 2014): 1–14. http://dx.doi.org/10.1155/2014/517219.

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The fresh and hardened properties of concrete with E-waste plastic, that is, high impact polystyrene (HIPS), as a partial replacement for coarse aggregate were analyzed using response surface methodology (RSM). Face-centred central composite response surface design was used in this study. The statistical models were developed between the factors (HIPS and water cement ratio) and their response variables (slump, fresh density, dry density, compressive strength, spilt tensile strength, and flexural strength). The Design-Expert 9.0.3 software package was used to analyze the experimental values. The relationships were established and final mathematical models in terms of coded factors from predicted responses were developed. The effects of factors on properties for all variables were seen visually from the response surface and contour plot. Validation of experiments has shown that the experimental value closely agreed with the predicted value, which validates the calculated response surface models with desirability = 1. The HIPS replacement influenced all the properties of concrete than water cement ratio. Even though all properties show the decline trend, the experimented values and predicted values give a hope that the E-waste plastic (HIPS) can be used as coarse aggregate up to certain percentage of replacement in concrete which successively reduces the hazardous solid waste problem and conserves the natural resources from exhaustion.

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Journal articles on the topic 'Fresh concrete waste'

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