矿渣-镍铁渣活性掺合料粉的基础性能研究  

Study on Basic Properties of Active Admixture Powder of Slag-Nickel-Iron Slag

作　　者：李沙 代文彬 杨飞华 潘德安 战佳宇 

机构地区：[1]北京工业大学材料科学与工程学院,北京100124 [2]固废资源化利用与节能建材国家重点实验室,北京100041 [3]中国恩菲工程技术有限公司,北京100038

出　　处：《混凝土世界》2019年第3期56-62,共7页China Concrete

基　　金：大宗固废制备绿色建材的环境评价体系研究;国家重点研发计划(2017YFC0703206)

摘　　要：以水淬镍铁渣作为矿渣部分替代原料制备了混凝土活性掺合料,探究了其粉磨性能、流动性、抗压强度、水化放热特性,并分析了水化产物及微观形貌。试验结果表明:随着镍铁渣掺量增加,其粉磨难度增大,流动性减小,渣粉抗压强度及活性指数降低;比表面积为410～420m^2/kg时,掺合料粉中镍铁渣掺量不宜超过50%;活性渣粉能显著降低水泥水化放热量,且镍铁渣掺量越多,水化放热总量越小,有利于降低大体积混凝土开裂风险。Used water-cooled ferronickel slag partly instead of blast furnace slag prepared active concrete admixture. Have studied the concrete admixture’ some performance such as grinding performance, flowability, compression strength, hydration heat, and analyzed its hydration products, and microstructure. Tests results show that, ferronickel slag is more difficult to grinding its flowability reducing and compression strength decreasing with increase of the amount of ferronickel slag. Meanwhile, when the specific surface of this concrete admixture powder is in 410~420m^2/kg, the proper amount of ferronickel slag would be less than 50%. Further, test shows that adding concrete admixture can evidently decrease hydration heat, the more amount of ferronickel slag, the less total hydration heat, which can reduce the risk of cracking within the concrete.

关 键 词：镍铁渣 矿渣粉 混凝土掺合料 基本性能 

分 类 号：TU528.041[建筑科学—建筑技术科学]