Abstract

The reinforcement efficiency on a composite depends on the effective transfer of the stress between matrix and fiber. This work presents an experimental and comparative study of fiber-matrix bond strength for fiber-matrix interface between glass fibers and carbon fibers added to the slag-based geopolymer matrix. This analysis was performed by pull-out test. A total of 18 tests have been conducted, three for each type of fiber at each embedded length of 10 mm, 20 mm and 30 mm. The critical embedded length and the maximum interfacial shear (bond) strength were analyzed, and SEM observations were carried out for the cross-section of each fiber to measure diameter and observe the interface. It was found that the greatest efficiency was obtained by reinforcing with the glass fibers, incorporated at 20 mm in the slag-based matrix.

摘要

复合材料的增强效率取决于基体和纤维之间应力的有效传递。这项工作对添加到矿渣基地质聚合物基体中的玻璃纤维和碳纤维之间的纤维-基体界面的纤维-基体结合强度进行了实验和比较研究。该分析通过拔出试验进行。总共进行了 18 次测试，每种类型的纤维在 10 毫米、20 毫米和 30 毫米的每个嵌入长度上进行了 3 次测试。分析了临界嵌入长度和最大界面剪切（结合）强度，并对每根纤维的横截面进行SEM观察，测量直径并观察界面。发现通过用玻璃纤维增​​强获得最大效率，玻璃纤维以 20 毫米处掺入渣基基质中。