垃圾焚烧炉渣粉替代矿粉对沥青混合料性能的影响

Effect of Municipal Solid Waste Incineration Bottom Ash Powder on Properties of Asphalt Mixture

摘要:

探讨了生活垃圾焚烧（MSWI）炉渣粉料（BAP）100%（质量分数）替代矿粉配制沥青混合料的可行性及其对沥青混合料性能的影响.进行了炉渣粉沥青混合料的配合比设计，分析了炉渣粉料对各项马歇尔指标以及沥青用量的影响；评价了炉渣粉料对沥青混合料路用性能的影响.结果表明：炉渣粉料的加入会使设计沥青用量增加，沥青混合料的马歇尔稳定度有所提高；炉渣粉料的表面形貌粗糙多孔，提高了沥青混合料的高温稳定性；炉渣粉料替代矿粉后，设计沥青用量的增加和混合料内部嵌挤结构的增强可以改善沥青混合料的低温抗裂性能；炉渣粉料中的SiO2和金属氧化物会导致沥青混合料的水稳定性有略微的降低；沥青对炉渣粉料的浸润更加良好，黏附状况更加理想.

Abstract:

Municipal solid waste incineration (MSWI) bottom ash powder (BAP) was used to replace (100% by mass) natural limestone powder in asphalt mixture, and its feasibility and effect on properties were discussed. Based on the designing of asphalt mixture proportion, the effect of BAP on design asphalt content and Marshall index was also studied. Pavement performance of asphalt mixture with BAP was investigated by room testing. The results show that the design asphalt content and the Marshall stability will increase because of the use of BAP. The high temperature stability of asphalt mixture with BAP increases benefitting from its rough and porous surface. The increasing of asphalt content and extruding structure can improve the low temperature crack resistance of asphalt mixture with BAP. Rather, the water stability decreases a little because BAP contains some SiO2 and metal oxides, but the infiltration and adhesion between asphalt and BAP is better.