李彦宵1,于本田1,*,张占旭2,吴明星1,谢 超1
李彦宵,于本田,张占旭,等.河砂粒径与纤维类型对ECC力学性能的影响[J].混凝土与水泥制品,2024(2):51-55,60.
LI Y X,YU B T,ZHANG Z X,et al.Influence of river sand particle size and fiber type on mechanical properties of ECC[J].China Concrete and Cement Products,2024(2):51-55,60.
河砂粒径与纤维类型对ECC力学性能的影响
李彦宵1,于本田1,*,张占旭2,吴明星1,谢 超1
李彦宵,于本田,张占旭,等.河砂粒径与纤维类型对ECC力学性能的影响[J].混凝土与水泥制品,2024(2):51-55,60.
LI Y X,YU B T,ZHANG Z X,et al.Influence of river sand particle size and fiber type on mechanical properties of ECC[J].China Concrete and Cement Products,2024(2):51-55,60.
摘 要:研究了河砂粒径(0~0.30、0~0.60、0~1.18、0~2.36 mm)与纤维类型(PVA、PE、PP、BF纤维)对工程水泥基复合材料(ECC)力学性能的影响,并进行了SEM分析。结果表明:随着河砂粒径的增大,试件的28 d极限拉应变、峰值应力和抗折强度基本均降低,多缝开裂特征逐渐减弱;4种纤维中,PVA纤维对ECC单轴拉伸性能和抗折性能的提高效果最好;PVA纤维与各粒级的河砂均具有良好的匹配性,在基体中分散较均匀。
Abstract: The influence of river sand particle size (0~0.30, 0~0.60, 0~1.18, 0~2.36 mm) and fiber types (PVA, PE, PP, BF fibers) on the mechanical properties of engineered cementitious composites (ECC) was studied, and SEM analysis was conducted. The results show that with the increase of river sand particle size, the 28 d ultimate tensile strain, peak stress, and flexural strength of the specimens are basically reduced, and the multi crack cracking characteristics gradually weaken. Among the four types of fibers, PVA fiber has the best effect on improving the uniaxial tensile and flexural properties of ECC. PVA fibers have good compatibility with various particle size of river sand and are evenly dispersed in the matrix.
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