再生骨料改性处理研究

Study in the improving properties of recycled aggregate

利用废弃混凝土生产再生骨料、配制再生混凝土是今后建筑业的发展方向之一。但由于再生骨料在服役或破碎期间产生孔隙、裂缝并含有大量砂浆块、砖块等,致使再生骨料强度偏低,吸水率较大及骨料粗糙的粒形效应、棱角效应,导致再生混凝土性能下降,制约了再生混凝土的利用。主要分析了再生骨料的主要特点,综述了目前国内外再生骨料的强化、活化方法和主要机理。

Waste concrete used as recycled aggregate to compounding recycled concrete is one of most important ways in the future.More cement mortar grain cohere the surface of recycled aggregate and machine crushes grain scathe to accumulate recycled aggregate being more tiny crack, high porosity, low piling density, great crushing index, high water absorption, which lead to properties of recycled concrete lowered and restricted to be utilized.In this study, the properties of the recycled aggregate were analyzed.The methods and the mechanism of modification, which can improve the properties of recycled aggregate, were introduced.