超硫水泥对有害离子的固化以及长期性能

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.