A Study on the Mechanical Properties and Microcosmic Mechanism of Basalt Fiber Modified Rubber Ceramsite Concrete

材料科学 玄武岩纤维 天然橡胶 抗压强度 极限抗拉强度 复合材料 吸水率 多孔性 纤维 混凝土性能 微观结构 骨料(复合) 透水混凝土 水泥
作者
Changming Bu,Dongxu Zhu,Lei Liu,Xinyu Lu,Yi Sun,Zhitao Yan,Lin Yu,Qike Wei
出处
期刊:Buildings [Multidisciplinary Digital Publishing Institute]
卷期号:12 (2): 103-103 被引量:12
标识
DOI:10.3390/buildings12020103
摘要

In order to solve the problem of black pollution in the 21st century, a new type of rubber ceramsite concrete was prepared by pulverizing waste rubber tires into granules and adding aggregate to the ceramsite concrete. In order to reduce the weakening of mechanical properties of rubber, basalt fiber was used to modify the rubber. In this study, the compressive strength and splitting tensile strength of concrete specimens at days 3 and 28 were measured, the variation rule of compressive strength was explained based on the appearance of the microstructure, and the internal porosity of cubic specimens was characterized by the water absorption size. At the same time, an ultrasonic wave velocity test was used to test the uniformity and pore distribution of the block. The results showed that, with the increase in the rubber content, the compressive strength of rubber ceramsite concrete increases first and then decreases. The addition of basalt fiber can improve the compressive strength of the concrete. Water absorption is negatively correlated with compressive strength. Porosity is also negatively correlated with ultrasonic wave velocity. The basalt fiber length has no significant effect on the splitting tensile strength.
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