Abstract

One of the main problems for restricting the extensive practical application of Engineered Cementitious Composite (ECC) is its expensive price due to the incorporation of high-price fine quartz sand and polyvinyl alcohol (PVA) fibers. To address this defect, the replacement with solid waste fine aggregate and locally produced PVA fiber has been proved to be a good choice. This work aims to develop low-cost green ECC using Yellow River silt as fine aggregate and locally produced unoiled PVA fiber. The effects of water-binder ratio, sand-binder ratio, and PVA fiber content on the mechanical characteristics of as-prepared ECC were evaluated by a comparative experiment. It has been indicated that the mechanical characteristics of as-prepared low-cost ECC are significantly affected by water-binder ratio, sand-binder ratio, and PVA fiber content. As the water-binder ratio rises, the tensile ductility of as-prepared low-cost ECC gradually increases, but the tensile strength, compressive strength, and flexural strength all decrease. The compressive strength and flexural strength exhibit a positive correlation with the sand-binder ratio, albeit with a minimal impact. Too low or high sand-binder ratio leads to a decrease in strain-hardening ability. Moreover, the as-prepared ECC exhibits a comparatively reduced tensile strain capacity when using locally produced unoiled PVA fiber as opposed to imported oiled PVA fiber. Finally, the environmental impact and economic benefits of the as-prepared low-cost ECC and Typical ECC are compared. The as-prepared low-cost ECC has good strain-hardening ability and low cost, indicating a potential application in real engineering.

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