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建筑材料中使用工业固体废弃物是节能减排的重要途径之一,本文采用钢渣和矿渣复合水泥作为胶凝材料制备水泥砂浆,并结合XRD、SEM和粒度分析等微观测试方法,对钢渣-矿渣复合胶凝材料活性及对砂浆性能的影响进行了试验研究。结果表明,当采用比表面积为400 m~2/kg和450 m~2/kg的钢渣,替代矿粉量达到10%时,钢渣-矿渣复合胶凝材料的活性可满足S95级矿粉活性的要求;钢渣的比表面积和掺量不同对砂浆的保水性影响不大,但对砂浆的稠度影响较大;为使砂浆强度满足使用要求,不同比表面积钢渣的最大掺量不宜超过30%;当采用钢渣作为活性矿物掺合料时,应采用与水泥和矿渣粒径相匹配的粒径分布,并通过试验确定掺量。
The use of industrial solid waste in building materials is one of the important ways to save energy and reduce emissions. In this paper, the cement mortar was prepared by using slag cement and slag composite cement as cementitious material. Combined with microscopic test methods such as XRD, SEM and particle size analysis, Composite cementitious material activity and the impact of mortar performance were studied. The results show that the steel slag-slag composite cementitious material can meet the requirements of S95 grade ore slag activity when using steel slag with specific surface area of 400 m ~ 2 / kg and 450 m ~ 2 / kg, The specific surface area and content of steel slag have little effect on the water retention of mortar, but have a great influence on the consistency of mortar. In order to meet the requirements of the mortar strength, the maximum content of steel slag with different specific surface area should not exceed 30% When steel slag is used as an active mineral admixture, a particle size distribution that matches the cement and slag particle size should be used and the amount should be determined experimentally.