风积砂对混凝土性能影响的研究进展

Research progress of influence of aeolian sand on concrete performance

随着基础设施建设速度日渐加快与规模不断加大,混凝土大量使用造成天然砂资源日趋枯竭。大量人工砂代替天然河砂应用到工程建设中,这虽然解决了天然砂紧缺问题,但造成了严重的环境污染且增加了建设成本。我国西部地区拥有富集的风积砂资源,若能因地制宜、就地取材,将风积砂应用于实际工程,将对社会、环境及经济产生巨大效益。通过文献调研,综述了风积砂作为细骨料制备混凝土的研究进展。该文从风积砂性质(物理、化学性质)、风积砂对混凝土性能的影响(和易性、力学性能、耐久性能、微观结构)两个方面对风积砂及风积砂混凝土进行了较详尽的概述。最后,对近年来风积砂混凝土研究存在的问题提出了一些建议,希望能给读者及今后关于风积砂混凝土方向的研究提供启发和思考。

As the speed of infrastructure construction is increasing and the scale is increasing,the large-scale use of concrete causes the natural sand resources to be depleted.A large amount of artificial sand is used in engineering construction instead of natural river sand.Although it solves the shortage of natural sand,it causes severe environmental pollution and increases construction costs.The western region of China has abundant aeolian sand resources.If the aeolian sand can be adapted to local conditions and taken from local sources,the application of aeolian sand to actual projects will have huge benefits for society,the environment and the economy.Through literature research,the research progress of concrete made by aeolian sand as fine aggregate is reviewed.Aeolian sand and aeolian sand concrete are analyzed from two aspects,aeolian sand properties(physical and chemical properties)and the effect of aeolian sand on concrete properties(workability,mechanical properties,durability,microstructure).A more detailed overview.Finally,some suggestions are made for the problems in the research of aeolian sand concrete in recent years,and I hope to provide inspiration and reflection for readers and future research on the direction of aeolian sand concrete.