建筑垃圾回填道路基层材料关键技术研究

随着低碳可循环建造技术的提升,建筑垃圾用于道路基层回填应用技术也日趋成熟.研究采用0％～50％不同再生骨料掺量制备再生水泥稳定碎石,并对其最大干密度、最佳含水率、无侧限抗压强度、抗冻性能、抗冲刷性能进行研究.结果表明:再生骨料的增加会使得稳定碎石材料的最大干密度、无侧限抗压强度、抗冻性能、抗冲刷性能下降,其中,抗冲刷性能受再生骨料掺量变化最为敏感.综合各主要性能变化规律,研究建议建筑垃圾回填道路基层材料中再生骨料的掺量应控制在30％以内.

Research on key technology of Road Base Material Backfilled with Construction Waste

With the improvement of low-carbon recyclable construction technology, the application technology of construction waste for road base backfilling is becoming more and more mature. In this paper, the recycled cement with 0% ~ 50% recycled aggregate of different content is used to stabilize macadam, and its maximum dry density, optimum moisture content, unconfined compressive strength, frost resistance and scour resistance are studied. The results show that the maximum dry density, the unconfined compressive strength, frost resistance and scour resistance of the stabilized macadam decrease with the increase of recycled aggregate. Among them, the frost resistance is the most sensitive to changes in the content of the recycled aggregate. Based on the main performance changes, it is suggested that the amount of recycled aggregate should be controlled within 30% in the base material of construction waste backfilling road.