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机制砂混凝土研究现状综述

Summary of Research Status of Machine-made Sand Concrete

  • 摘要: 随着房建行业的快速发展,对混凝土的需求也日益增加。优质的天然砂作为混凝土理想的细集料日益短缺,多地区天然砂资源甚至已经枯竭,机制砂作为新型建筑材料替代天然砂已成为混凝土行业发展的必然趋势。机制砂主要是由岩石、卵石、矿山废石等为原料经机械加工破碎而成,其材料特性与天然砂存在着较大的差异,使得其制备的混凝土在配合比设计、性能表现、生产及施工等方面都与天然砂混凝土大不相同。为了更好地了解机制砂的材料特性,本文分别从机制砂的岩性、颗粒级配、石粉含量、MB值及制造方式对混凝土性能的影响进行总结,并进一步分析机制砂混凝土的发展现状,为机制砂的推广和应用提供参考。

     

    Abstract: With the rapid development of the housing industry, the demand for concrete is increasing. High-quality natural sand as an ideal fine aggregate for concrete is increasingly short, natural sand resources in many regions have even been exhausted, machine-made sand as a new building material to replace natural sand has become an inevitable trend of sustainable development of concrete industry. Machine-made sand is mainly broken by mechanical processing of rock, pebble, mine waste rock and other raw materials. Its material characteristics are quite different from natural sand, which makes the concrete prepared by it very different from natural sand concrete in mix ratio design, performance, production and construction. In order to better understand the material properties of machine-made sand, this paper summarizes the effects of the lithology, particle composition, stone powder content, MB value and manufacturing method of machine-made sand on the performance of concrete, and analyzes the development status of machine-made sand concrete, so as to provide references for the promotion and application of machine-made sand.

     

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