Test research on mechanical properties of engineered cementitious composites

Taking engineered cementitious composites(ECC) as the research object, the effects of sand particle size(A), total fiber volume content(B) and fiber types(C)(single, double or triple blending)on the flexural strength, compressive strength and tensile strength of ECC were studied by orthogonal test. The results show that the total fiber volume content has the greatest influence on the three mechanical properties of ECC, and the three mechanical properties are improved with the increase of total fiber volume content. Followed by the influence of fiber types, the flexural and compressive strength of single doped PVA is higher than single doped PP and the two mixed, steel fiber can improve the flexural and tensile strength. The influence of sand particle size on the three mechanical properties of ECC is the least. After comprehensive consideration, in the range considered in this study, the optimal scheme is 600 gm grain size, 2% fiber volume content and triple blending(PP0.5%+PVA1%+S0.5%).