- 周 旭，李曉琴，丁 捷，黃 可
引用本文摘 ? 要：研究了單摻粉煤灰和復摻粉煤灰與硅灰代替部分水泥對PVA-ECC試件力學性能、裂縫寬度及抗滲性能的影響。結果表明，單摻粉煤灰會導致PVA-ECC試件強度下降，但可顯著增加其韌性。復摻粉煤灰與硅灰時，PVA-ECC試件表現出優異的應變硬化特性以及多縫開裂現象，力學性能得到提升，基體均勻性增加，抗滲性能得到改善，最大提升了約33%。試驗得到了具有良好性能的粉煤灰-硅灰-水泥三元體系PVA-ECC試件，其極限拉伸應變達到2.07%，抗壓強度達到42.6 MPa，裂縫寬度較小且分布均勻，滲透系數僅為2.136×10-11 m/s，抗滲性能較優。 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,李曉琴,丁捷,等.礦物摻合料對PVA-ECC性能的影響[J].混凝土與水泥制品,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.