转炉钢渣对矿渣-硅酸盐水泥混合胶砂的收缩补偿效应  

Compensation effect of converter steel slag powder on the shrinkage of hardened mortar prepared by ground granulated blast furnace slag and portland cement

作　　者：赵旭光[1] 赵三银[1] 吴国林[2] 何永刚[2] 文梓芸[2] 

机构地区：[1]广东韶关学院化学与环境工程学院,广东韶关512005 [2]华南理工大学材料科学与工程学院,广州510640

出　　处：《西安建筑科技大学学报（自然科学版）》2006年第2期290-293,共4页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家高技术研究发展计划(2002AA335050);华南理工大学国家985工程高水平大学建设重大项目(B09-224);武汉理工大学硅酸盐工程教育部重点实验室开放基金课题(B7-324-4210)

摘　　要：大掺量矿渣混凝土比硅酸盐水泥混凝土表现出更大的收缩,影响混凝土的耐久性.研究了转炉钢渣粉对矿渣粉-硅酸盐水泥混合胶砂硬化体收缩特性的影响.研究表明:转炉钢渣粉部分替代矿渣粉,可显著降低矿渣粉-水泥混合胶砂的收缩.钢矿复合掺合料中钢渣的掺量越高,掺合料对硅酸盐水泥的替代比例越高,收缩补偿效果愈好.当掺合料对水泥的替代比例为70%、掺合料中钢渣粉(比表面积576 m2/kg)掺量分别为20%和40%时,所制备胶砂的4 d和80 d干缩值比矿渣粉(比表面积565 m2.kg-1)-硅酸盐水泥混合胶砂分别降低18.9%,12.8%和36.5%,33.4%.The shrinkage of high volume ground granulated blast furnace slag （GGBFS） concrete is larger than that of Portland cement （PC） concrete and has negative effect on the durability of the concrete. The effect of converter steel slag powder （CSSP）, on the shrinkage characteristic of hardened GGBFS - PC mixed mortar is studied. Results showed that partial replacement of GGBFS by CSSP would evidently reduce the shrinkage of hardened GGBFS-PC blending mortar specimen. Higher is both the blending ratio of CSSP in CSSP-GGBFS composite addition and the replacing ratio of CSSP- GGBFS composite addition for PC,and better is the compensation effect on the shrinkage of prepared mortar specimen. When the blending ratio of CSSP GGBFS composite addition to Portland cement is 7 to 3 and the composite addition contained 20 wt % and 40 wt % CSSP with 576m^2/kg Blaine specific surface area（BSSA）, the 4d and 80d shrinkage value of the prepared mortar specimen may drop by 18.9%, 12.8%and 36.5% ,33.4% respectively than that of mortar specimen prepared with pure GGBFS（BSSA is 565m^2/kg） and PC according to Chinese standard JC/T603-1995 （air curing, temperature 20±3℃, relative humidity 50± 4℃）.

关 键 词：收缩补偿 转炉钢渣 高炉矿渣 复舍掺合料 混凝土 

分 类 号：TU521.4[建筑科学—建筑技术科学]