养护条件对机制砂混凝土性能影响的研究现状与解决方案

Research Status and Solutions on the Effect of Maintenance Conditions on the Performance of Machine-made Sand Concrete

随着河砂资源的短缺和市场规模发展需要,将岩石破碎形成的机制砂逐渐取代河砂。但机制砂由于表面形态、级配特点、粉尘较多等原因而与河砂存在一定差异,配制成的机制砂混凝土因此与河砂混凝土存在差异。混凝土的性能受养护条件影响非常大,针对目前养护条件对机制砂混凝土性能影响的研究现状,分析了研究的不足并提出了相应的解决方案,为逐渐减少甚至不再使用天然河砂,进一步推动机制砂的生产及应用和保护河堤生态环境提供参考方案。

With the shortage of river sand resources and the need for market scale development,the mechanism sand formed by crushing rocks gradually replaces river sand.However,the mechanism sand differs from river sand due to its surface morphology,grading characteristics,and more dust,and the formulated mechanism sand concrete therefore differs from river sand concrete.In view of the current research situation on the effect of maintenance conditions on the performance of concrete made of mechanism sand,we analyze the shortcomings of the research and propose corresponding solutions to gradually reduce or even eliminate the use of natural river sand,further promote the production and application of mechanism sand and protect the ecological environment of river banks.