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为开辟建筑垃圾废砖再生利用新途径,将建筑垃圾废砖磨细成粉,即建筑垃圾砖粉(CWBP),与其他工业废渣复合形成建筑垃圾复合粉体材料(CWCPM).借助XRD,DSC-TG,SEM及MIP微观测试手段,研究了CWBP与CWCPM对水泥基材料水化产物数量、微观形貌及其孔结构的影响.研究结果表明:CWBP颗粒级配及形貌较差,活性较低;CWCPM可充分发挥各组成材料间的叠加效应,粒径较小的颗粒可填充于水泥颗粒间,有利于胶凝体系形成紧密堆积结构;CWCPM的二次水化反应降低了取向性较强、稳定性较差的Ca(OH)2含量,改善了水泥基材料内部微观形貌,细化了混凝土孔结构,可有效改善混凝土孔径分布.
In order to open up a new way for the regeneration and utilization of construction waste waste bricks, the construction waste brick is ground into powder, namely construction waste brick powder (CWBP), and composites with other industrial waste residues to form the construction waste composite powder material (CWCPM) The effects of CWBP and CWCPM on the hydration products, microstructure and pore structure of cement-based materials were studied by means of -TG, SEM and MIP microscopic tests.The results show that the CWBP particles have poor grading and morphology, Low; CWCPM can give full play to the superposition of the composition of the material effect, the smaller particle size can be filled in the cement particles, is conducive to the gelled system to form a close packing structure; CWCPM secondary hydration reduces the orientation , Poor stability of Ca (OH) 2 content, improve the internal microstructure of cement-based materials, refine the pore structure of concrete, which can effectively improve the pore size distribution of concrete.