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Rafa Siddique - One of the best experts on this subject based on the ideXlab platform.
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recycle option for metallurgical by product spent Foundry Sand in green concrete for sustainable construction
Journal of Cleaner Production, 2018Co-Authors: Rafa Siddique, Gurpree Singh, Malki SinghAbstract:Abstract Reuse of waste materials as construction material is very much essential to achieve sustainable construction. Utilization of waste materials as construction material not only help in protection of environment but also result in monetary savings. Spent Foundry Sand (SFS) is the waste material generated by metal casting industry. This paper presents study on economic and environmental benefits of recycling of SFS in concrete as Sand replacement. Strength and durability properties of green concrete made with SFS as Sand replacement are also presented. Natural Sand in concrete was replaced with SFS at 0, 5, 10, 15 and 20% replacement levels by weight. To assess the performance of green concrete made with SFS, compressive strength, splitting tensile strength, deicing salt resistance and chloride permeability tests were performed. At age of 28 days, green concrete mixtures containing SFS as Sand replacement displayed up to 26% and 12.87% improvement in compressive strength and splitting tensile strength over that of control concrete, respectively. Similarly, concrete mixtures made with SFS exhibited 7.2–17.7% lower chloride ion penetration and 6.6–26.42% improvement in salt scaling resistance on use of SFS. The green concrete mixtures showed very slight scaling after 50 cycles of freezing and thawing in the presence of deicing salt compared to slight to moderate scaling shown by control concrete. The incorporation of up to 20% SFS as Sand replacement results improvement in strength and durability properties of green concrete over those of control concrete. Green concrete made with SFS is economical and reduces negative impact on environment by reducing CO 2 emissions.
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comparative investigation on the influence of spent Foundry Sand as partial replacement of fine aggregates on the properties of two grades of concrete
Construction and Building Materials, 2015Co-Authors: Rafa Siddique, Gurpree Singh, Rafik Elarbi, Karim AitmokhtaAbstract:Abstract An experimental program was carried out to study the influence of spent Foundry Sand (SFS) as partial replacement for fine aggregates (natural Sand) on two grades of concrete mixtures. Two control concrete mixtures (M20 & M30) were designed to have 28-day compressive strength of 30 MPa and 40 MPa. Then, fine aggregate (natural Sand) was replaced with five percentages (0%, 5%, 10%, 15%, 20%) of SFS by weight. Comparative performance of both types of concrete (M20 & M30) was investigated by measuring compressive strength, splitting tensile strength, modulus of elasticity, chloride permeability, and ultra sonic pulse velocity up to the age of 365 days. Test result indicate a marginal increase in strength and durability properties of plain concrete by inclusion of SFS as a partial replacement of fine aggregate. Further, influence of incorporating spent Foundry Sand is more prominent on M20 grade of concrete as it enhances the strength and durability properties better than M30 grade of concrete.
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microstructure and properties of concrete using bottom ash and waste Foundry Sand as partial replacement of fine aggregates
Construction and Building Materials, 2014Co-Authors: Yogesh Aggarwal, Rafa SiddiqueAbstract:Abstract The possibility of substituting natural fine aggregate with industrial by-products such as waste Foundry Sand and bottom ash offers technical, economic and environmental advantages which are of great importance in the present context of sustainability in the construction sector. The study investigated the effect of waste Foundry Sand and bottom ash in equal quantities as partial replacement of fine aggregates in various percentages (0–60%), on concrete properties such as mechanical (compressive strength, splitting tensile strength and flexural strength) and durability characteristics (rapid chloride penetration and deicing salt surface scaling) of the concrete along with microstructural analysis with XRD and SEM. The results showed that the water content increased gradually from 175 kg/m 3 in control mix (CM) to 238.63 kg/m 3 in FB60 mix to maintain the workability and the mechanical behavior of the concrete with fine aggregate replacements was comparable to that of conventional concrete except for FB60 mix. The compressive strength was observed to be in the range of 29–32 MPa, splitting tensile strength in the range of 1.8–2.46 MPa, and flexural strength in the range of 3.95–4.10 MPa on the replacement of fine aggregates from 10% to 50% at the interval of 10%. Furthermore, it was observed that the greatest increase in compressive, splitting tensile strength, and flexural strength compared to that of the conventional concrete was achieved by substituting 30% of the natural fine aggregates with industrial by-product aggregates. The inclusion of waste Foundry Sand and bottom ash as fine aggregate does not affect the strength properties negatively as the strength remains within limits except for 60% replacement. The morphology of the formations arising as a result of the hydration process was not observed to change in the concrete with varying percentages of waste Foundry Sand and bottom ash.
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effects of elevated temperatures on properties of self compacting concrete containing fly ash and spent Foundry Sand
Construction and Building Materials, 2012Co-Authors: Neelam Pathak, Rafa SiddiqueAbstract:Abstract In this paper an attempt has been made to study the use of spent Foundry Sand and fly ash on the properties of Self-Compacting-Concrete (SCC) such as compressive strength, splitting tensile strength, modulus of elasticity, rapid chloride permeability, porosity and mass loss when exposed to elevated temperatures. The influence of fly ash as partial replacement of cement, and spent Foundry Sand as partial replacement of Sand on the properties of SCC is investigated. In this research, mixes were prepared with three percentages of fly ash ranging from 30% to 50% and one controlled mixture without fly ash was also prepared for comparison. Fine aggregate was replaced with 10% of spent Foundry Sand. The specimens of each concrete mixture were heated up to different temperatures (27 °C, 100 °C, 200 °C, and 300 °C). In order to ensure a uniform temperature throughout the specimens, the temperature was held constant at the maximum value for 1 h before cooling. Using Ordinary Portland cement, an increase of about 24–25% in compressive strength, 18–22% in splitting tensile strength was observed at 28 days when fly ash content was decreased from 50% to 30%. Also test results clearly show that there is little improvement in compressive strength within the temperature range of 200–300 °C as compared to 27–200 °C. But the rate of splitting tensile strength and modulus of elasticity loss was higher than that of the compressive strength loss at elevated temperatures and with the increase in percentage of fly ash. In this paper X-ray diffraction and Scanning Electron Microscopic (SEM) observations were also made to explain the observed residual compressive strength increase between 200 and 300 °C.
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properties of concrete containing fungal treated waste Foundry Sand
Construction and Building Materials, 2012Co-Authors: Gurdeep Kau, Rafa Siddique, Anita RajoAbstract:Abstract Waste Foundry Sands represent the highest amount of solid wastes generated by foundries. The high cost of land-filling and the potential uses of waste Foundry Sand in construction purposes have prompted research into their beneficial reuse. For high-performance construction materials microbial (bacteria/fungi) modified concrete has become an important area of research. This study investigates the effects of incorporating fungal treated waste Foundry Sand (WFS) on concrete. Results present the effect of Aspergillus spp. on compressive strength, water absorption and porosity of concrete containing waste Foundry Sand. The study shows that 15.6% increase in compressive strength of concrete after 28 days was achieved with the addition of fungal ( Aspergillus spp.) treated 20% WFS containing concrete and also shows decrease in water absorption (68.8%) and porosity (45.9%). X-ray diffraction (XRD) results suggest that fungal culture ( Aspergillus spp.) is capable to form good C–S–H gel than untreated concrete containing WFS, which shows that Aspergillus spp. increase the ability of cement to react properly with Foundry Sand and hence due to which C–S–H gel formation increases. Silica present in WFS is consumed to form C–S–H gel, which in turn hardened the fungal treated waste Foundry Sand containing concrete.
Gurpree Singh - One of the best experts on this subject based on the ideXlab platform.
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recycle option for metallurgical by product spent Foundry Sand in green concrete for sustainable construction
Journal of Cleaner Production, 2018Co-Authors: Rafa Siddique, Gurpree Singh, Malki SinghAbstract:Abstract Reuse of waste materials as construction material is very much essential to achieve sustainable construction. Utilization of waste materials as construction material not only help in protection of environment but also result in monetary savings. Spent Foundry Sand (SFS) is the waste material generated by metal casting industry. This paper presents study on economic and environmental benefits of recycling of SFS in concrete as Sand replacement. Strength and durability properties of green concrete made with SFS as Sand replacement are also presented. Natural Sand in concrete was replaced with SFS at 0, 5, 10, 15 and 20% replacement levels by weight. To assess the performance of green concrete made with SFS, compressive strength, splitting tensile strength, deicing salt resistance and chloride permeability tests were performed. At age of 28 days, green concrete mixtures containing SFS as Sand replacement displayed up to 26% and 12.87% improvement in compressive strength and splitting tensile strength over that of control concrete, respectively. Similarly, concrete mixtures made with SFS exhibited 7.2–17.7% lower chloride ion penetration and 6.6–26.42% improvement in salt scaling resistance on use of SFS. The green concrete mixtures showed very slight scaling after 50 cycles of freezing and thawing in the presence of deicing salt compared to slight to moderate scaling shown by control concrete. The incorporation of up to 20% SFS as Sand replacement results improvement in strength and durability properties of green concrete over those of control concrete. Green concrete made with SFS is economical and reduces negative impact on environment by reducing CO 2 emissions.
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comparative investigation on the influence of spent Foundry Sand as partial replacement of fine aggregates on the properties of two grades of concrete
Construction and Building Materials, 2015Co-Authors: Rafa Siddique, Gurpree Singh, Rafik Elarbi, Karim AitmokhtaAbstract:Abstract An experimental program was carried out to study the influence of spent Foundry Sand (SFS) as partial replacement for fine aggregates (natural Sand) on two grades of concrete mixtures. Two control concrete mixtures (M20 & M30) were designed to have 28-day compressive strength of 30 MPa and 40 MPa. Then, fine aggregate (natural Sand) was replaced with five percentages (0%, 5%, 10%, 15%, 20%) of SFS by weight. Comparative performance of both types of concrete (M20 & M30) was investigated by measuring compressive strength, splitting tensile strength, modulus of elasticity, chloride permeability, and ultra sonic pulse velocity up to the age of 365 days. Test result indicate a marginal increase in strength and durability properties of plain concrete by inclusion of SFS as a partial replacement of fine aggregate. Further, influence of incorporating spent Foundry Sand is more prominent on M20 grade of concrete as it enhances the strength and durability properties better than M30 grade of concrete.
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abrasion resistance and strength properties of concrete containing waste Foundry Sand wfs
Construction and Building Materials, 2012Co-Authors: Gurpree Singh, Rafa SiddiqueAbstract:Abstract The abrasion resistance and strength properties of concrete containing waste Foundry Sand (WFS) were investigated. Sand (fine aggregate) was replaced with 0%, 5%, 10%, 15% and 20% of WFS by mass. The water-to-cement ratio and the workability of mixtures were maintained constant at 0.40 and 85 ± 5 mm, respectively. Properties examined were compressive strength, splitting tensile strength, modulus of elasticity and abrasion resistance expressed as depth of wear. Test results indicated that replacement of Sand with WFS enhanced the 28-day compressive strength by 8.3–17%, splitting tensile strength by 3.6–10.4% and modulus of elasticity by 1.7–6.4% depending upon the WFS content, and showed continuous improvement in mechanical properties up to the ages of 365 days. Inclusion of WFS as Sand replacement significantly improved the abrasion resistance of concrete at all ages. Strong correlation exists between the abrasion resistance and each of the mechanical properties investigated.
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utilization of waste Foundry Sand wfs in concrete manufacturing
Resources Conservation and Recycling, 2011Co-Authors: Rafa Siddique, Gurpree SinghAbstract:Abstract Due to ever increasing quantities of waste materials and industrial by-products, solid waste management is the prime concern in the world. Scarcity of land-filling space and because of its ever increasing cost, recycling and utilization of industrial by-products and waste materials has become an attractive proposition to disposal. There are several types of industrial by-products and waste materials. The utilization of such materials in concrete not only makes it economical, but also helps in reducing disposal concerns. One such industrial by-product is waste Foundry Sand (SFS). Waste Foundry Sand is a by-product of ferrous and nonferrous metal casting industries. Foundries successfully recycle and reuse the Sand many times in a Foundry. When the Sand can no longer be reused in the Foundry, it is removed from the Foundry and is termed as waste Foundry Sand. Published literature has shown that WFS could be used in manufacturing Controlled Low-Strength Materials (CLSM) and concrete. This paper presents an overview of some of the research published on the use of WFS in concrete. Effect of WFS on concrete properties such as compressive strength, splitting tensile strength, modulus of elasticity, freezing-thawing resistance, and shrinkage are presented.
Albe Noumowe - One of the best experts on this subject based on the ideXlab platform.
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effect of used Foundry Sand on the mechanical properties of concrete
Construction and Building Materials, 2009Co-Authors: Rafa Siddique, Gee De Schutte, Albe NoumoweAbstract:Abstract Used-Foundry Sand is a by-product of ferrous and nonferrous metal casting industries. Foundries successfully recycle and reuse the Sand many times in a Foundry. When the Sand can no longer be reused in the Foundry, it is removed from the Foundry and is termed used/spent Foundry Sand. In an effort to utilize used-Foundry Sand in large volumes, research is being carried out for its possible large-scale utilization in making concrete as partial replacement of fine aggregate. This paper presents the results of an experimental investigation carried out to evaluate the mechanical properties of concrete mixtures in which fine aggregate (regular Sand) was partially replaced with used-Foundry Sand (UFS). Fine aggregate was replaced with three percentages (10%, 20%, and 30%) of UFS by weight. Tests were performed for the properties of fresh concrete. Compressive strength, splitting-tensile strength, flexural strength, and modulus of elasticity were determined at 28, 56, 91, and 365 days. Test results indicated a marginal increase in the strength properties of plain concrete by the inclusion of UFS as partial replacement of fine aggregate (Sand) and that can be effectively used in making good quality concrete and construction materials.
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utilization of spent Foundry Sand in controlled low strength materials and concrete
Resources Conservation and Recycling, 2008Co-Authors: Rafa Siddique, Albe NoumoweAbstract:Abstract With ever increasing quantities of industrial by-products and waste materials, solid waste management has become the principal environmental concerns in the world. Scarcity of land-filling space and due to its ever increasing cost, utilization/recycling of by-products/waste has become an attractive alternative to disposal. Several types of by-products and waste materials are generated. Each of these waste products has specific effects on the properties of cement-based materials (CLSM and Concrete). The utilization of such materials in concrete/CLSM not only makes it economical, but also do help in reducing disposal problems. Reuse of bulk wastes is considered the best environmental alternative for solving the problem of disposal. One of such industrial by-products is Spent Foundry Sand (SFS). Spent Foundry Sand is a by-product of ferrous and non-ferrous metal casting industries. Foundries successfully recycle and reuse the Sand many times in a Foundry. When the Sand can no longer be reused in the Foundry, it is removed from the Foundry and is termed as spent Foundry Sand. Published literature has shown that SFS could be possibly used in manufacturing Controlled Low-Strength Materials (CLSM) and concrete. This paper presents an overview of some of the research published on the use of SFS in controlled low-strength materials and concrete. Effect of SFS on CLSM characteristics like plastic properties, compressive strength, permeability, and leachate analysis, and concrete properties such as compressive strength, splitting tensile strength, modulus of elasticity, freezing–thawing resistance, and shrinkage are presented.
Mu Naushad - One of the best experts on this subject based on the ideXlab platform.
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waste Foundry Sand mgfe layered double hydroxides composite material for efficient removal of congo red dye from aqueous solution
Scientific Reports, 2020Co-Authors: Dooraid N Ahmed, Laith A Naji, Ayad A H Faisal, Nadhi Alansari, Mu NaushadAbstract:We aimed to obtain magnesium/iron (Mg/Fe)-layered double hydroxides (LDHs) nanoparticles-immobilized on waste Foundry Sand-a byproduct of the metal casting industry. XRD and FT-IR tests were applied to characterize the prepared sorbent. The results revealed that a new peak reflected LDHs nanoparticles. In addition, SEM-EDS mapping confirmed that the coating process was appropriate. Sorption tests for the interaction of this sorbent with an aqueous solution contaminated with Congo red dye revealed the efficacy of this material where the maximum adsorption capacity reached approximately 9127.08 mg/g. The pseudo-first-order and pseudo-second-order kinetic models helped to describe the sorption measurements, indicating that the physical and chemical forces governed the removal process.
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Waste Foundry Sand/MgFe-layered double hydroxides composite material for efficient removal of Congo red dye from aqueous solution
USA, 2020Co-Authors: Ahmed, Dooraid N., Naji, Laith A., Faisal, Ayad A. H., Al-ansari Nadhi, Mu NaushadAbstract:We aimed to obtain magnesium/iron (Mg/Fe)-layered double hydroxides (LDHs) nanoparticles-immobilized on waste Foundry Sand-a byproduct of the metal casting industry. XRD and FT-IR tests were applied to characterize the prepared sorbent. The results revealed that a new peak reflected LDHs nanoparticles. In addition, SEM-EDS mapping confirmed that the coating process was appropriate. Sorption tests for the interaction of this sorbent with an aqueous solution contaminated with Congo red dye revealed the efficacy of this material where the maximum adsorption capacity reached approximately 9127.08 mg/g. The pseudo-first-order and pseudo-second-order kinetic models helped to describe the sorption measurements, indicating that the physical and chemical forces governed the removal process.Validerad;2020;Nivå 2;2020-02-17 (johcin)
Anita Rajo - One of the best experts on this subject based on the ideXlab platform.
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properties of concrete containing fungal treated waste Foundry Sand
Construction and Building Materials, 2012Co-Authors: Gurdeep Kau, Rafa Siddique, Anita RajoAbstract:Abstract Waste Foundry Sands represent the highest amount of solid wastes generated by foundries. The high cost of land-filling and the potential uses of waste Foundry Sand in construction purposes have prompted research into their beneficial reuse. For high-performance construction materials microbial (bacteria/fungi) modified concrete has become an important area of research. This study investigates the effects of incorporating fungal treated waste Foundry Sand (WFS) on concrete. Results present the effect of Aspergillus spp. on compressive strength, water absorption and porosity of concrete containing waste Foundry Sand. The study shows that 15.6% increase in compressive strength of concrete after 28 days was achieved with the addition of fungal ( Aspergillus spp.) treated 20% WFS containing concrete and also shows decrease in water absorption (68.8%) and porosity (45.9%). X-ray diffraction (XRD) results suggest that fungal culture ( Aspergillus spp.) is capable to form good C–S–H gel than untreated concrete containing WFS, which shows that Aspergillus spp. increase the ability of cement to react properly with Foundry Sand and hence due to which C–S–H gel formation increases. Silica present in WFS is consumed to form C–S–H gel, which in turn hardened the fungal treated waste Foundry Sand containing concrete.
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waste Foundry Sand and its leachate characteristics
Resources Conservation and Recycling, 2010Co-Authors: Rafa Siddique, Gurdeep Kau, Anita RajoAbstract:Abstract Solid waste management has become one of the global environmental issues, as there is continuous increase in industrial by-products and waste materials. Due to lack of land filling space and its ever increasing cost, utilization of waste material and by-products has become an attractive alternative to disposal. Waste Foundry Sand (WFS) is one of such industrial by-product which could be used in various applications including construction materials such as Controlled Low-Strength Material (CLSM) and concrete. The beneficial use of such by-products in construction materials results in reducing the cost of construction materials’ ingredients and also helps in reducing disposal problem. The leachate obtained from such materials may contain hazardous compounds, which may possibly effect the environment. So, it is important to know the characteristics of leachate obtained from waste Foundry Sand. Understanding the leachate characteristics of WFS is essential in its disposal, environmental impact, and potential development for beneficial utilization towards solid waste management. This paper describes the physical, chemical properties of WFS, various leachate test methods, and research published on leachate characteristics of waste Foundry Sand.