早强型钢矿渣胶凝材料的制备与性能表征  

Preparation and Characterization of Early Strengthened of Binding Materials Steel Slag&Blast Furnace Slag

作　　者：李健生 李家茂[1] 葛雪祥 樊传刚[1] LI Jiansheng;LI Jiamao;GE Xuexiang;FAN Chuangang(School of Materials Science and Engineering,Anhui University of Technology,Maanshan 243032,China)

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002

出　　处：《安徽工业大学学报（自然科学版）》2020年第4期321-326,共6页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽高校协同创新项目(GXXT-2019-028)。

摘　　要：以钢渣和矿渣微粉为主要原料,P.O 52.5水泥为碱性激发剂,利用二次混磨方法制备钢矿渣胶凝材料及其胶砂试样,对胶砂试样的力学性能进行表征分析。结果表明:当胶凝材料配料中固定铝硅质原料掺量为4%(质量分数,下同)、钢渣矿渣质量比为1∶1时,胶砂试样各龄期抗压、抗折强度和软化系数随P.O 52.5水泥掺量的增大先增加后降低;P.O 52.5水泥掺量为24%时,胶砂试样各龄期抗压、抗折强度和软化系数均达最大,3 d抗压、抗折强度分别为18.2,4.8 MPa,满足42.5强度等级的矿渣硅酸盐水泥要求;28 d抗压、抗折强度分别为36.8,8.1 MPa,满足32.5强度等级的钢渣矿渣水泥要求。Taking powders of steel slag(SS)and blast furnace slag(BFS)as main raw materials and P.O 52.5 cement as alkali-activator,the binding materials and its mortar sample were prepared with the secondary mixed grinding method.The properties of mortar sample were characterized and analyzed.The results show that the compressive strength(CS),flexural strength(FS)and softening coefficient(SC)of steel slag cementitious materials at different ages first increase and then decrease with the increase of P.O 52.5 cement content,when the content of aluminosilicate raw material is 4%(mass fraction,the same below)and the mass ratio of SS to BFS is 1∶1.When the content of P.O 52.5 cement is 24%,the CS,FS and SC of mortar sample at different ages reach the maximum.The CS and FS at 3 d are 18.2 and 4.8 MPa respectively,which meets the strength index requirement of steel slag portland cement with 42.5 strength grade.The CS and FS at 28 d are 36.8 and 8.1 MPa respectively,which meets the strength index requirements of steel and iron slag cement with 32.5 strength grade.

关 键 词：钢渣 矿渣 胶凝材料 碱性激发剂 

分 类 号：TU411.01[建筑科学—岩土工程]