钢渣-矿渣复合对装配式建筑用灌浆料性能的影响研究

Study on the influence of steel slag and granulated blast furnace slag on the properties of grouting materials for prefabricated buildings

研究了不同掺量的钢渣-矿渣复合微粉取代硅酸盐水泥,对水泥基灌浆料流动度和力学性能的影响。研究结果表明:当采用复合微粉取代硅酸盐水泥时,随钢渣掺量的增加,水泥基灌浆料的流动性呈现下降的趋势,早期强度下降显著,后期强度变化不大;当钢渣-矿渣复合微粉掺量为胶凝材料总量的30%,钢渣微粉与矿渣微粉比为1∶2时,灌浆料的初始流动度达到300 mm,30 min流动度达到285 mm,1、3、28 d抗压强度分别达到24.4、46.0、72.8 MPa,满足GB/T 50448《水泥基灌浆料应用技术规范》的要求。

In this paper,the effects of fluidity and mechanical properties on cementitious grout were investigatedwith with different proportions of micro-powder mixture of steel slag and granulated blast furnace slag substituting for Portland cement.The results show that:when the micro-powder mixture replaced Portland cement,the fluidity of cementitious grout showed a downward trend with the increase of steel slag content.The early strength decreased significantly,but the latter strength changed little;When the total content of micro-powder mixture is 30%,The ratio of slag powder to granulated blast furnace slag is 1 ∶2,the initial fluidity of grout materials reached 300 mm,the 30 min fluidity of grout materials reached 285 mm,the compressive strength of 1,3 and 28 d reached 24.4,46.0 and 72.8 MPa respectively.It met the requirements of the national standard of cementitious grout,and the technical scheme was economical and feasible.