机制砂混凝土耐火性能及改善措施

Fire resistance of manufactured sand concrete and improvement measures

通过查阅国内外对混凝土高温作用后,其力学性能变化研究的相关文献,以及了解新型混凝土材料机制砂混凝土的研究现状,发现存在以下问题:由于试验结果没有呈现出规律性,所以无法得到在整个受火过程准确的爆裂发生时间点、爆裂深度各个因素间的相互作用等问题。给出了机制砂混凝土耐火性能的几点改善措施:掺加石粉、改变胶凝材料及掺加纤维材料等。

Through reviewing the related literature of the domestic and international research on the change of mechanical properties of concrete after high temperature,and by understanding the research status of new concrete materials and manufactured sand concrete,the following problems are found:Since the test results do not show regularities,it is impossible to obtain the interactions between various factors like accurate burst occurrence time and burst depth during the fire process.In this paper,several improvement measures for the fire resistance of the manufactured sand concrete are given,such as adding stone powder,changing cementing material and adding fiber material,etc.