钢渣砂水泥砂浆和易性能影响因素研究

Study on Influencing Factors of Workability for Steel Slag Sand Cement Mortar

将热闷和热泼钢渣砂等体积替代天然河砂制备水泥砂浆,对其流动度进行测试,研究钢渣砂处理工艺、水灰比、钢渣砂粒径范围,以及减水剂用量对其砂浆和易性能影响规律.结果表明:钢渣砂处理工艺对其砂浆和易性能有所影响,掺量为25%~75%时,内蒙热闷钢渣砂砂浆流动度平均要比广西热泼钢渣砂砂浆高8.0%;水灰比为0.55时,两种钢渣砂砂浆均表现出较好的和易性能,筛去钢渣砂较细的部分有利于提高砂浆流动度;减水剂对提高砂浆流动性有明显作用,减水剂用量为1.35,2.25和3.15 g时,内蒙钢渣砂砂浆流动度分别增大14.0%,29.3%和42.3%,且减水剂用量为2.25 g时和易性能最佳.

Cement mortar was prepared by replacing natural river sand with hot stuffy and hot splashing steel slag sand,and its fluidity was tested to study the influence of steel slag sand treatment process,water cement ratio,steel slag sand particle size range and water reducing agent dosage on its workability.The experimental results show that the processing technology of steel slag sand has some influence on the workability of its mortar.When the content of steel slag sand is 25%~75%,the fluidity of hot stuffy steel slag sand mortar in Inner Mongolia is 8.0%higher than that of hot splashing steel slag sand mortar in Guangxi.When the water-cement ratio is 0.55,both kinds of steel slag sand mortar show good workability,and screening out the finer part of steel slag sand is beneficial to improve the fluidity of mortar.The water reducing agent can obviously improve the fluidity of mortar.When the water reducing agent dosage is 1.35 g,2.25 g and 3.15 g,the fluidity of Inner Mongolia steel slag sand mortar increases by 14.0%,29.3%and 42.3%respectively,and the workability is the best when the water reducing agent dosage is 2.25 g.