摘要
为实现工业固废的资源化利用,研究了以钢渣、水渣和脱硫石膏为原料制备的复合胶凝材料作为掺合料替代水泥制备C30混凝土。考察复合胶凝材料的掺入量对胶材标准稠度用水量、凝结时间、混凝土性能的影响。结果表明:净浆的标准稠度用水量和凝结时间与复合胶凝材料的掺入量呈正相关;所制备混凝土的抗压强度随着复合胶凝材料替代水泥量的增加而下降,全部使用胶凝材料制备混凝土试块的28 d抗压强度达到43.5 MPa,为水泥对照组的78.3%。钢渣微粉和脱硫石膏能够促进水渣水化生成钙钒石和水化硅酸钙等水化产物,起到良好的胶结作用,使得混凝土结构致密。该复合胶凝材料可替代部分水泥,减少CO_(2)排放,带来巨大的经济效益和环境效益,具有广阔的市场应用前景。
In order to realize the resource utilization of industrial solid waste,the effect of composite cementitious materials prepared from steel slag,water slag and desulfurized gypsum as the admixtures,on the properties of paste and concrete was studied.The result showed that:The water requirement of normal consistency and setting time of the pure slurry were positively correlated with the amount of composite cementitious material;the compressive strength of the prepared concrete decreased as the amount of cement replaced by the composite cementitious material increased.The 28 d compressive strength of whole concrete blocks prepared with composite cementitious materials was 43.5 MPa,which was 78.3%of the cement control group.The research showed that steel slag powder and desulfurized gypsum could promote the hydration of water slag to form hydration products including calcium vanadium stone and calcium silicate hydrate,which played a good cementation role to make the concrete structure dense and obtain good performance.The partial substitution for cement of composite cementitious material would reduce CO_(2)emissions,bring economic and environmental benefits,and have broad market application prospects.
作者
杨志强
赛音巴特尔
时朝昆
尹尤豪
郭俊祥
王金花
付建华
YANG Zhiqiang;SAIYIN Bateer;SHI Zhaokun;YIN Youhao;GUO Junxiang;WANG Jinhua;FU Jianhua(Shougang Group Research Institute of Technology,Beijing 100043,China;Beijing Key Laboratory of Green Recyclable Process for Iron&steel Production Technology,Beijing 100043,China)
出处
《环境工程》
CAS
CSCD
北大核心
2023年第3期143-147,共5页
Environmental Engineering
关键词
工业固废
复合胶凝材料
性能测试
C30混凝土
industrial solid waste
composite cementitious material
performance test
C30 concrete
