低碱度转炉钢渣用作矿物掺和料的试验研究  

Experiment on the low alkalinity steel slag as mineral admixture

作　　者：程福安[1,2] 李辉[1,2] 李丙明[2] 张力[2] 

机构地区：[1]西部建筑科技国家重点实验室(筹),陕西西安710055 [2]西安建筑科技大学材料科学与工程学院粉体工程研究所,陕西西安710055

出　　处：《西安建筑科技大学学报（自然科学版）》2009年第6期871-875,共5页Journal of Xi'an University of Architecture & Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(50872105);陕西省重大科技创新项目(2008ZKC04-04)

摘　　要：将低碱度钢渣同矿渣复合掺配用作矿物掺合料进行了试验研究.利用XRD分析了低碱度钢渣的矿物组成并借助扫描电镜微观观察对矿物掺和料的反应机理进行了分析.试验结果表明:对于低碱度钢渣,适宜的粉磨细度为400～500m2/g;低碱度钢渣单独作为矿物掺和料时掺量不宜超过20%;用矿渣和钢渣复合掺配时,总掺量在30%和40%时,力学性能接近基准试样,且矿渣和钢渣的最佳配比为2∶1.较之单掺钢渣水化试样,复掺钢渣、矿渣水化试样的水化速度要快,结构更致密,无明显片状Ca(OH)2晶体.In this paper, the low alkalinity steel slag （LASS） was used as mineral admixture separately as well as com- pound with superfine blast furnace slag （BFS） together. With X-ray diffraction （XRD） analysis, the mineral composition of LASS was revealed, and with the aid of scanning electron microscope（SEM）, the reaction mechanism was discussed. The test results showed that the fineness of the steel slag should be finer than 500 m2/g. If only use LASS as mineral admixture, the adding content should not be over 20%, whereas compound with superfine slag, the mechanical property of the sample was near to that of the standard samples despite the 30% ~40% mineral admixture added. In this case, the best matching ratio of BFS to LASS was 2 ： 1. Compared with the sample added with LASS only, the sample added with both BFS and LASS hydrated more quickly,more compactly and with much less sheet-like Ca（OH）2.

关 键 词：低碱度钢渣 矿物掺和料 矿渣 

分 类 号：TU521.4[建筑科学—建筑技术科学]