Abstract

Due to increasing urbanisation, the volume of cement production and construction waste is increasing and poses a hazard to the environment. As a result, it is important to replace completely or partly of cement with an alternative material to achieve a sustainable environment. In recent years, researchers have been drawn attention to produce self compacting concrete due to its uniqueness in self weight and becoming compacted efficiently with no segregation and bleeding. In this study, the fresh and durability properties of self-compacting concrete were studied. The chemical setting of MgSO4 solution with three different concentrations (5, 10, and 20%) at variance periods (30, 60 and 90 days) were exposed to elevated temperatures (200 °C, 400 °C, 600 °C, and 800 °C) for 3 h at ages 56, 90, and 120 days. The reduction in compressive strength, mass, and UPV was measured. It was found that the NC incorporating SCC specimens have higher durability properties than reference SCC. At the same time, the lower weight percentages of BLP provided insignificant durability properties. Therefore, both mixture material (NC and BLP) can be utilised for producing SCC with good durability.

摘要

由于城市化进程不断加快，水泥生产量和建筑垃圾量不断增加，对环境造成危害。因此，用替代材料完全或部分替代水泥以实现可持续的环境非常重要。近年来，自密实混凝土因其自重独特、能有效密实、不离析、不泌水等优点而受到研究人员的关注。在这项研究中，研究了自密实混凝土的新鲜和耐久性能。将三种不同浓度（5%、10% 和 20%）的 MgSO4 溶液在不同时期（30、60 和 90 天）的化学设置暴露于高温（200 °C、400 °C、600 °C 和 800 °C），在 56、90 和 120 天时持续 3 小时。抗压强度、质量的降低，并测量了UPV。结果发现，结合 SCC 的 NC 样本比参考 SCC 具有更高的耐久性能。同时，较低重量百分比的 BLP 提供的耐久性能微不足道。因此，两种混合材料（NC和BLP）都可以用来生产具有良好耐久性的SCC。