超硫水泥对有害离子的固化以及长期性能  

Solidification of Harmful Ions and Long-Term Performance of Supersulfated Phosphogypsum Cement Systems

作　　者：班加星 陆建鑫 潘智生[1] BAN Jiaxing;LU Jianxin;POON Chisun(Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]香港理工大学土木与环境工程学系,中国香港999077

出　　处：《建筑材料学报》2024年第7期596-603,共8页Journal of Building Materials

基　　金：国家自然科学基金资助项目(52308275)。

摘　　要：普通硅酸盐水泥(OPC)是一种广泛使用的胶凝材料,但其生产会伴随大量的碳排放.为了减少碳排放,一种有效的方法就是利用固体废弃物制备新型低碳超硫水泥(SPCS)来代替OPC.废弃阴极射线管(CRT)玻璃作为固废,可用于制备SPCS,但其含有多种危险重金属.因此,本研究将CRT玻璃粉作为胶凝材料,CRT玻璃砂作为骨料,应用到SPCS与OPC中,并对比了2种胶凝体系对重金属的固化效果以及长期性能.结果表明,相比于OPC体系,SPCS体系具有更优异的重金属固化效果,同时也能更显著地抑制碱骨料反应.Ordinary Portland cement(OPC)is a widely used cementitious material.Its production is accompanied by a large amount of carbon emissions.To reduce carbon emissions,this research prepared a novel low-carbon supersulfated phosphogypsum cement system(SPCS)with solid wastes to replace OPC.Cathode ray tube(CRT)glass is a hazardous waste containing various heavy metals,which can be used to prepare SPCS.In this study,CRT glass powder was used as a cementitious material and CRT glass sand was used as an aggregate in SPCS and OPC.The immobilization effect and durability of the two cementitious systems were compared.The results show that SPCS system has a better heavy metal immobilization effect than OPC system,and can also significantly inhibit alkali silica reaction.

关 键 词：低碳胶凝材料 固化稳定化 重金属 耐久性 废弃玻璃 

分 类 号：TU526[建筑科学—建筑技术科学]