钢渣对道路基层水泥水化产物的影响  

Effect of Steel Slag on Hydration Product of Road Base Cement

作　　者：刘春 赵德强 张昺榴 曹亮宏 朱文尚[4] 沈卫国[2] LIU Chun;ZHAO De-qiang;ZHANG Bing-liu;CAO Liang-hong;ZHU Wen-shang;SHEN Wei-guo(Guangdong Highway Construction Co Ltd,Guangzhou 510623,China;School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China;Baoli Changda Engineering Co Ltd,Guangzhou 510620,China;China Building Materials Acadmey,Beijing 100024,China)

机构地区：[1]广东省公路建设有限公司,广州510623 [2]武汉理工大学材料科学与工程学院,武汉430070 [3]保利长大工程有限公司,广州510620 [4]中国建筑材料科学研究总院,北京100024

出　　处：《武汉理工大学学报》2020年第2期24-28,共5页Journal of Wuhan University of Technology

基　　金：“十三五”国家重点研发计划(2016YFB0303603);国家自然科学基金(51972247).

摘　　要：钢渣可作为一种含f-Cao的弱胶凝性混合材配入道路基层水泥中,来调控基层专用水泥的凝结时间、膨胀率及强度等性能。研究了钢渣对道路基层水泥水化产物及微观形貌的影响,结果表明:在水化早期,钙矾石的生成量随着钢渣掺量的增加而降低,从而导致膨胀率的下降。无论在水化早期还是后期,高钢渣掺量水泥的硬化浆体中Ca(OH)_(2)的含量更高。钢渣中含有的惰性颗粒组分几乎不参与水泥的水化,钢渣掺量为20%的硬化水泥浆体中存在一些较为明显的微裂缝,导致其强度下降。As a kind of weak cementitious admixture,steel slag can be added to the road base cement in order to control the setting time,expansion rate,and strength of the road base cement.We studied the effect of steel slag on the hydration products and microscopic morphology of road base cement.The experimental results show that in the early stage of hydration,the amount of ettringite decreases with the increase of the amount of steel slag,which shows expansion rate decline in macroscopic.Whether in the early or late hydration period,the content of Ca(OH)_(2) in the hardened cement slurry with high steel slag content is higher.Inert particle components in steel slag hardly participated in the hydration of cement,there are some obvious micro-cracks in the hardened cement paste with 20%steel slag,which can decrease strength.

关 键 词：钢渣 基层水泥 水化产物 微观形貌 

分 类 号：TQ172.44[化学工程—水泥工业]