钢渣细集料及钢渣砂浆体积稳定性试验研究

Experimental Research on the Volume Stability of Steel Slag Fine Aggregate and Steel Slag Mortar

通过对钢渣细集料各粒级压蒸粉化率的测定,分别进行了不同钢渣掺量砂浆试块的压蒸稳定性试验,采用X射线衍射(XRD)测试技术,分析了钢渣细集料中白、褐色颗粒对其体积稳定性的影响。研究表明:当钢渣内含有白色颗粒且陈伏期较短时,钢渣细集料的稳定性应以0.6～1.18 mm钢渣压蒸后过0.6 mm筛得出的粉化率并结合所配制的砂浆体积稳定性作为评价指标;在满足钢渣砂浆稳定性的前提下,不同粒级钢渣细集料替代天然砂制备钢渣砂浆时的掺量不同。

Measuring the autoclave pulverization rate of every granulometric class steel slag fine aggregate by autoclave expansion test,separately carried on pressure steaming stability test of different Steel slag mixed quantity of mortar testblock,using XRD testing techniques,analysed the impact of volume stability which by the white granule and brown granule in steel slag fine aggregate.The results showed that if the white granule in steel slag and storage period is short,steel slag fine aggregate＇s stability should use the autoclave pulverization rate of autoclaving 0.6-1.18 mm partical size then 0.6 mm sieving＇s steel slag and combine with the volume stability of the prepared motar as evaluation criteria;Meet the premise of steel slag cement mortar＇s stability,steel slag＇s added quantity should be different by the different granulometric class of steel slag fine aggregate replacing natural sand preparing steel slag cement mortar.