水泥改良建筑垃圾再生材料微观结构研究

为探究水泥改良建筑垃圾再生材料的微观结构及其力学性能、水稳性能变化，选取掺加1.5 %，2.5 %水泥的改良建筑垃圾再生材料，采用扫描电镜实验（SEM）对不同水泥量试样进行微观结构观察，并从微观结构对不同水泥掺量改良建筑垃圾再生材料的力学性能、水稳性能的变化进行分析。结果表明:通过掺加水泥，微观结构中固相之间连结关系发生改变，水泥含量的不同，使建筑垃圾再生材料混合料微观结构产生了明显的变化:黏结力增强、孔隙率降低、整体性增强，同时改变了液相、气相的分布特征；宏观上表现为建筑垃圾再生材料混合料强度等力学性能及水稳性能的增强。

Study on Microstructure of Cement Improved Recycled Materials for Construction Waste

In order to explore the microstructure, mechanical properties and water stability of cement-improved construction waste recycled materials, 1.5 % and 2.5 % cement-modified samples were selected, and scanning electron microscopy (SEM) tests were performed on different cement samples. Observe the microstructure, and analyze the changes in the mechanical properties and water stability performance of the construction waste recycled materials improved by different cement contents from the microstructure. The results show that: by adding cement, the connection relationship between the solid phases in the microstructure changes. Because of the difference in cement content , the microstructure of the construction waste recycled material mixture significantly changes, such as the bonding force increases, the porosity decreases and the integrity is enhanced. In addition, the distribution characteristics of the liquid phase and gas phase are changed at the same time. Macroscopically, the mechanical properties such as the strength of the construction waste recycled material mixture and the water stability performance are enhanced.