Effect of Superfine Slag Powder on HPC Properties  

作　　者：WuYAO JieLI 

机构地区：[1]StateKeyLaboratoryofConcreteMaterialsResearch,TongjiUniversity,Shanghai200092,China [2]SchoolofCivilEngineering,TongjiUniversity,Shanghai200092,China

出　　处：《Journal of Materials Science & Technology》2003年第1期87-90,共4页材料科学技术（英文版）

基　　金：The research work presented in this paper was conducted with partial support from the Foundation for University Key Teacher by the Ministry of Education;The first author also gratefully acknowledges the financial support from NSFC (No. 59908007); t

摘　　要：A superfine slag powder (SP) made from granulated blast furnace slag incorporating activators by using special millingtechnique, was used as supplementary cementitious material in high performance concrete (HPC), replacing part ofthe mass of normal Portland cement. The effects of the SP on the workability, mechanical and crack self-healingproperties of HPC were studied. The hydration process and microstructure characteristics were investigated by X-raydiffraction (XRD) and scanning electron microscopy (SEM) techniques, respectively. The crack self-healing capacitywas evaluated by Brazilian test. The test results indicate that the SP has especially supplementary effect on waterreducing and excellent property of better control of slump loss. The concrete flowability increases remarkably withthe increase of SP replacement level in the range of 20% to 50%. The compressive and splitting tensile strengthsof HPC containing SP are higher than the corresponding strength of the control concrete at all ages. The crackself-healing ability is highly dependent on SP content of HPC.

关 键 词：Superfine slag powder High performance SELF-HEALING 

分 类 号：TU528[建筑科学—建筑技术科学]