EFFECT OF STEEL FIBER ON THE MECHANICAL PROPERTIES OF CEMENT-BASED COMPOSITES CONTAINING SILICA FUME

硅粉 材料科学 复合材料 极限抗拉强度 水泥 抗压强度 纤维 磨损(机械) 水合硅酸钙 纤维混凝土 硅酸盐水泥
作者
Wei‐Ting Lin,Ran Huang,Chin‐Lai Lee,Hui‐Mi Hsu
出处
期刊:Journal of marine science and technology [National Taiwan Ocean University]
卷期号:16 (3) 被引量:22
标识
DOI:10.51400/2709-6998.2010
摘要

An experimental program was carried out to evaluate the mechanical properties of cement-based composites. Test variables included water to cementitious ratio, dosage of silica fume and volume fraction of steel fiber. Compressive strength test, direct tensile strength test, splitting tensile strength test, abrasion resistance test and drop weight test were performed and the results were analyzed statistically. According to the results of this study, the designed direct tensile testing method was a suitable method to estimate the tensile strength of fiber cement-based composites. Addition of fibers provided better performance for the cement-based composites, while silica fume in the composites would help obtaining uniform fiber dispersion in the matrix and improve strength and the bonding between fiber and matrix resulting from extra dense calcium-silicate-hydrate gel. The combination of steel fibers and silica fume can greatly increase the mechanical properties of cement-based composites. Besides, a multiple regression analysis was conducted to correlate compressive strength, direct tensile strength, abrasion coefficient and impact number with w/cm ratio, silica fume content and steel fiber content and a fairly agreement between test data and estimated values was found.
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