废旧道路材料混合再生基层材料力学性能研究
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摘要
受矿料资源短缺和建筑材料成本上升等因素困扰,废旧道路材料再生利用成为道路建设行业的一个新方向。为研究再生骨料和沥青路面铣刨料混合再生应用于基层水泥稳定碎石材料中的力学性能,共设计了6组不同材料掺量组合方案,通过无侧限抗压强度、抗压回弹模量、劈裂强度和弯拉强度试验,分别测试混合再生水稳碎石材料7 d、14 d、28 d和90 d龄期下性能的变化差异。研究表明:再生骨料的掺入会削减水稳碎石基层材料的力学性能,而沥青路面铣刨料的掺入可以在一定程度上缓解其削弱幅度。合理设计旧料的掺配组合方案可实现其与普通基层材料在力学性能方面无明显差异。
Waste road material recycling has become a new direction of road construction industry due to short mineral aggregate resource and increasing building materials cost. In order to study the mechanical property of base cement stabilized macadam material which is recycled by recycled aggregate and asphalt pavement milling, we designed 6 groups of different material content combining scheme and respectively tested change difference of mixed reclaimed water stabilized macadam material at 7~(th), 14~(th), 28~(th) and 90~(th) day by unconfined compressive strength, compressive modulus of resilience, splitting strength and flexural strength test. The research shows that the incorporation of recycled aggregates will reduce the mechanical properties of water stabilized macadam base materials and incorporation of asphalt pavement milling material can alleviate its weakening degree. Reasonable old material blending scheme can make the mechanical difference between it and ordinary base material little.
Waste road material recycling has become a new direction of road construction industry due to short mineral aggregate resource and increasing building materials cost. In order to study the mechanical property of base cement stabilized macadam material which is recycled by recycled aggregate and asphalt pavement milling, we designed 6 groups of different material content combining scheme and respectively tested change difference of mixed reclaimed water stabilized macadam material at 7~(th), 14~(th), 28~(th) and 90~(th) day by unconfined compressive strength, compressive modulus of resilience, splitting strength and flexural strength test. The research shows that the incorporation of recycled aggregates will reduce the mechanical properties of water stabilized macadam base materials and incorporation of asphalt pavement milling material can alleviate its weakening degree. Reasonable old material blending scheme can make the mechanical difference between it and ordinary base material little.
引文
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[2] 汪京.废旧基层材料水泥稳定再生利用技术研究[D].北京:北京建筑大学,2016.
[3] 尚宏世,赵永刚.废旧沥青混合料水稳石试验研究[J].甘肃科学学报,2016,28(6):85-88,148.
[4] 陈福东.城市道路路基填筑中建筑垃圾的处理[J].筑路机械与施工机械化,2008,(9):44-46.
[5] 唐超,林京松,杨和平.水泥稳定碎石基层上透层施工渗透深度试验研究[J].中外公路,2016,36(6):42-45.
[6] 吴文飞,何锐,陈华鑫,等.旧沥青路面全深式冷再生基层材料力学性能[J].广西大学学报:自然科学版,2016,41(1):253-260.
[7] 孙殿家.路用冷再生材料力学性能试验分析及研究[D].保定:华北电力大学,2012.
[8] 舒森.水泥稳定就地冷再生基层应用技术研究[D].西安:长安大学,2009.