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Design of Mixture Proportion of Engineered Cementitious Composites Based on Desert Sand
https://orcid.org/https://orcid.org/0000-0002-0530-6899
https://orcid.org/https://orcid.org/0000-0001-9661-3634
https://orcid.org/https://orcid.org/0009-0002-2545-0764
Engineered Cementitious Composites are a type of advanced building materials, which have excellent ductility and can significantly enhance structural resistance. However, the expensive material cost of ECC limits its engineering applications. This study investigated the potential of replacing commonly used silica (river) sand and imported PVA fibers with the local desert sand and PVA fibers, aiming at reducing the preparation cost of ECC and improving its economic benefits and sustainability. The mixture proportion was first optimized to obtain favorable strength and ductile enhancement, using a combination of single-factor test and theoretical calculation which mentioned the slurry coating thickness of fibers and desert sand. The potential of desert sand in preparing ECC was experimentally evaluated by comparing the uniaxial tension (compression) properties and microstructures of desert sand-based ECC (DS-ECC) and those of ordinary ECC. The results indicate that optimized DS-ECC can achieve satisfactory performance even when 100% fine aggregates are replaced by desert sand. It has comparable uniaxial tensile (compression) strengths to ordinary ECC but a significantly improved tensile ductility, with the ultimate tensile strain of about 5–8% and 3% at 7d and 28d curing ages, respectively. Meanwhile, the utilization of desert sand and local PVA fibers alone in ECC can substantially deliver a reduction of about 20–30% in material cost and an improvement in environmental impact.
Design of Mixture Proportion of Engineered Cementitious Composites Based on Desert Sand
https://orcid.org/https://orcid.org/0000-0002-0530-6899
https://orcid.org/https://orcid.org/0000-0001-9661-3634
https://orcid.org/https://orcid.org/0009-0002-2545-0764
Engineered Cementitious Composites are a type of advanced building materials, which have excellent ductility and can significantly enhance structural resistance. However, the expensive material cost of ECC limits its engineering applications. This study investigated the potential of replacing commonly used silica (river) sand and imported PVA fibers with the local desert sand and PVA fibers, aiming at reducing the preparation cost of ECC and improving its economic benefits and sustainability. The mixture proportion was first optimized to obtain favorable strength and ductile enhancement, using a combination of single-factor test and theoretical calculation which mentioned the slurry coating thickness of fibers and desert sand. The potential of desert sand in preparing ECC was experimentally evaluated by comparing the uniaxial tension (compression) properties and microstructures of desert sand-based ECC (DS-ECC) and those of ordinary ECC. The results indicate that optimized DS-ECC can achieve satisfactory performance even when 100% fine aggregates are replaced by desert sand. It has comparable uniaxial tensile (compression) strengths to ordinary ECC but a significantly improved tensile ductility, with the ultimate tensile strain of about 5–8% and 3% at 7d and 28d curing ages, respectively. Meanwhile, the utilization of desert sand and local PVA fibers alone in ECC can substantially deliver a reduction of about 20–30% in material cost and an improvement in environmental impact.
Design of Mixture Proportion of Engineered Cementitious Composites Based on Desert Sand
https://orcid.org/https://orcid.org/0000-0002-0530-6899
https://orcid.org/https://orcid.org/0000-0001-9661-3634
https://orcid.org/https://orcid.org/0009-0002-2545-0764
Engineered Cementitious Composites are a type of advanced building materials, which have excellent ductility and can significantly enhance structural resistance. However, the expensive material cost of ECC limits its engineering applications. This study investigated the potential of replacing commonly used silica (river) sand and imported PVA fibers with the local desert sand and PVA fibers, aiming at reducing the preparation cost of ECC and improving its economic benefits and sustainability. The mixture proportion was first optimized to obtain favorable strength and ductile enhancement, using a combination of single-factor test and theoretical calculation which mentioned the slurry coating thickness of fibers and desert sand. The potential of desert sand in preparing ECC was experimentally evaluated by comparing the uniaxial tension (compression) properties and microstructures of desert sand-based ECC (DS-ECC) and those of ordinary ECC. The results indicate that optimized DS-ECC can achieve satisfactory performance even when 100% fine aggregates are replaced by desert sand. It has comparable uniaxial tensile (compression) strengths to ordinary ECC but a significantly improved tensile ductility, with the ultimate tensile strain of about 5–8% and 3% at 7d and 28d curing ages, respectively. Meanwhile, the utilization of desert sand and local PVA fibers alone in ECC can substantially deliver a reduction of about 20–30% in material cost and an improvement in environmental impact.
Design of Mixture Proportion of Engineered Cementitious Composites Based on Desert Sand
KSCE J Civ Eng
Wang, Dan (author) / Che, Jialing (author) / Liu, Chen (author) / Liu, Haifeng (author)
KSCE Journal of Civil Engineering ; 28 ; 2897-2907
2024-07-01
11 pages
Article (Journal)
Electronic Resource
English
Design of Mixture Proportion of Engineered Cementitious Composites Based on Desert Sand
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