Abstract

Numerous works investigating the use of rubber waste as aggregate in concrete have been well documented. Most of the works covered the enhancement method in improving the mechanical properties of rubberized concrete. However, limited works on permeation-durability related characteristics of rubberized concrete have been reported. In this study, further understanding on metakaolin blended concrete containing 10% treated crumb rubber with respect to its permeation-durability behaviour is discovered. The effectiveness of rubberized concrete with the two-stage approach where sodium hydroxide solution treated crumb rubber combined with 15% metakaolin was evaluated on workability, compressive strength, permeation, and durability properties at a different level of superplasticizer (0.25%, 0.50%, 0.75%, and 1.0%). The permeation tests included absorption and permeability whereas rapid chloride permeability and carbonation tests were for durability assessment. The results showed that the reduction in permeation properties and better durability resistance were achieved at a superplasticizer level of 0.75%. Thus, it can be concluded that the good workability of concrete mixture able to discontinued pore connectivity and resulted in high permeation and durability resistance of metakaolin blended-rubberized concrete.

摘要

许多研究使用橡胶废料作为混凝土骨料的工作都有很好的记录。大部分工作涉及提高橡胶混凝土力学性能的增强方法。然而，关于橡胶混凝土的渗透耐久性相关特性的研究有限。在这项研究中，进一步了解了含有 10% 处理橡胶粒的偏高岭土共混混凝土的渗透耐久性行为。在不同水平的减水剂（0.25%、0.50%、0.75 % 和 1.0%）。渗透测试包括吸收和渗透，而快速氯化物渗透和碳化测试用于耐久性评估。结果表明，在 0.75% 的减水剂水平下，渗透性能的降低和更好的耐久性抗性得以实现。因此，可以得出结论，混凝土混合物的良好和易性能够中断孔隙连通性，并导致偏高岭土共混橡胶混凝土具有高渗透性和耐久性。