- 周 旭，李晓琴，丁 捷，黄 可
引用本文摘 要：研究了单掺粉煤灰和复掺粉煤灰与硅灰代替部分水泥对PVA-ECC试件力学性能、裂缝宽度及抗渗性能的影响。结果表明，单掺粉煤灰会导致PVA-ECC试件强度下降，但可显著增加其韧性。复掺粉煤灰与硅灰时，PVA-ECC试件表现出优异的应变硬化特性以及多缝开裂现象，力学性能得到提升，基体均匀性增加，抗渗性能得到改善，最大提升了约33%。试验得到了具有良好性能的粉煤灰-硅灰-水泥三元体系PVA-ECC试件，其极限拉伸应变达到2.07%，抗压强度达到42.6 MPa，裂缝宽度较小且分布均匀，渗透系数仅为2.136×10-11 m/s，抗渗性能较优。 Abstract: The effects of single-doped fly ash and mixed fly ash and silica fume instead of part of cement on the mechanical properties, crack width and impermeability of PVA-ECC specimen were studied. The results show that the single-doped fly ash can reduce the strength of PVA-ECC specimen, but significantly increase its toughness. When mixed with fly ash and silica fume, PVA-ECC specimen shows excellent strain hardening characteristics and multi-slit cracking, the mechanical properties are improved, the matrix uniformity is increased, and the impermeability is improved with a maximum increase of about 33%. The good performance of fly ash-silica fume-cement ternary system PVA-ECC specimen is obtained, and its ultimate tensile strain is 2.07%, compressive strength is 42.6 MPa, crack width is small and uniformly distributed, permeability coefficient is only 2.136 × 10-11 m/s, and its impermeability is good.
周旭,李晓琴,丁捷,等.矿物掺合料对PVA-ECC性能的影响[J].混凝土与水泥制品,2020(9):43-46. ZHOU X,LI X Q,DING J,et al.The Effect of Mineral Admixture on the Performance of PVA-ECC[J].CHINA CONCRETE AND CEMENT PRODUCTS,2020(9):43-46.