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钢渣作为世界上产量最大的固体废弃物之一,其环保处置与资源化属当今世界上最热门的研究热点之一。在我国公路的蓬勃发展的背景下,将钢渣细颗粒应用于微表处混合料的主骨料中,部分替代优质玄武岩,将是资源化钢渣的新突破点。将钢渣粉作为活性填料替代水泥、消石灰等传统的填料,配以玄武岩细颗粒、废旧橡胶粉和SBR改性乳化沥青配制成MS一3型钢渣微表处混合料。对所成型的钢渣微表处混合料,采用拌和时间、1h湿轮磨耗以及粘聚力等指标来评价其综合路用性能,试验结果表明:钢渣微表处混合料可拌和时间较长,均超过了规定的120s的最低限度,证明钢渣微表处混合料适宜生产;1h湿轮磨耗值较小,均小于规定的540 g/cm2;60min粘聚力的值均大于规定值2N·m,这些都反映出钢渣微表处混合料的优秀路用性能,并在实验室中证明是一种可靠的沥青路面养护材料。钢渣微表处混合料能有效解决钢渣应用不充分、微表处混合料路用性能不够好等问题。
As one of the largest solid wastes in the world, steel slag is one of the hottest research topics in the world today. In the context of the booming highway in our country, the fine particles of steel slag are applied to the main aggregate of micro-surfacing mixture, and the partial replacement of high-quality basalt will be a new breakthrough point of recycling steel slag. The steel slag as an active filler instead of cement, slaked lime and other traditional fillers, together with basalt fine particles, waste rubber powder and SBR modified emulsified asphalt formulated MS-3 steel slag micro-surfacing mixture. The composite properties of the steel slag micro-surfacing were evaluated by using the mixing time, 1h wet-wheel wear and cohesiveness, etc. The results show that the mixture of slag and micro-surfacing can be mixed for a long time, both Exceeds the minimum limit of 120s, which proves that the slag mixture at the micro-surfacing site is suitable for production. The wet wheel abrasion value at 1 hour is smaller than the specified 540 g / cm2. The values of 60min cohesion are both larger than the specified value of 2Nm, These all reflect the excellent road performance of the slag micro-surfacing mixture and prove to be a reliable asphalt pavement maintenance material in the laboratory. Steel slag micro-surfacing mixture can effectively solve the problem of inadequate application of steel slag, micro-surfacing mixture road performance is not good enough and so on.