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Development of eco-efficient lightweight self-compacting concrete with high volume of recycled EPS waste materials

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Abstract

Reusing the industrial waste materials is one of the main aims of sustainability and achieve the environmental protection. However, concrete is the main production for recycling waste materials and cleaning the climate. The utilization of self-consolidating lightweight concrete (SCLC) can achieve two important advantages of the structure self-weight reduction and improving workability. This paper examined the effect of waste expanded polystyrene (EPS) beads on the workability and hardened characteristics of sustainable SCLCs. Six different EPS volume fractions up to 80% replaced with normal coarse aggregate to produce SCLC mixtures with water to binder (w/b) ratio of 0.35. A total binder content of 500 kg/m3 by including 20% waste ceramic powder with 80% Portland cement and fine aggregate consist of river sand and fine ceramic with 1:1 ratio in all SCLC mixes. The workability of SCLCs was examined by slump flow time and diameter, L-box height ratio, V-funnel flow time, and segregation resistance. Moreover, the hardened properties tested at different curing periods such as compressive strength at 7, 28, and 90 days; flexural strength at 28 and 90 days; and splitting tensile strength, dry density, voids percent, water absorption, ultrasonic pulse velocity (UPV); and scanning electron microscope (SEM) at 28 days. The results verified that workability of SCLCs enhanced as EPS incorporation increased and achieved the limitations required for self-compacting concrete (SCC) while the strengths value curtailed but the compressive strength satisfied the lower value indicated by ACI for structural purposes. Depending on the water absorption and UPV, results illustrated that all produced sustainable SCLC mixtures had a good durability. Furthermore, a high linear correlation was noticed between the results.

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Nadhim HAMAH SOR (corresponding author): idea of concept; planning; validation; resources; data curation; writing—original draft; writing—review and editing for this manuscript. Nahla Hilal: experimental work done; planning and designing; validation; writing—review for this manuscript. Rabar H. Faraj: validation; resources; data curation; writing—review for this manuscript.

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Correspondence to Nadhim Hamah Sor.

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Responsible Editor: Philippe Garrigues

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Highlights

• Increasing the volume fractions of EPS particles improved the durability performance of SCLC but reduced its mechanical properties.

• The workability of SCLC improved as EPS incorporation increased.

• Recycling a high volume of ceramic wastes as powder and fine aggregate in SCLC production.

• Sustainable SCLC with higher EPS content as cleaner production can be used for structural purposes.

• A strong linear correlation between the tests results can be observed.

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Hilal, N., Hamah Sor, N. & Faraj, R.H. Development of eco-efficient lightweight self-compacting concrete with high volume of recycled EPS waste materials. Environ Sci Pollut Res 28, 50028–50051 (2021). https://doi.org/10.1007/s11356-021-14213-w

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  • DOI: https://doi.org/10.1007/s11356-021-14213-w

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