2023NO.8建筑与土木SCIENCE&TECHNOLOGYINFORMATION科技资讯科技资讯SCIENCE&TECHNOLOGYINFORMATION不同替代率再生骨料水泥稳定碎石性能研究石拓1陈世斌1*王增强2尹壮飞2(1.长安大学道路施工技术与装备教育部重点实验室陕西西安710064;2.山东高速路桥集团有限公司山东济南250014)摘要：将废旧水泥混凝土再生集料用于水泥稳定碎石基层，实现基层再生集料的全替代，是路面绿色化建设的目标。该文中对比研究了天然集料和不同替代率下再生集料水泥稳定碎石的性能，试验结果表明：再生集料的物理性能（表观密度、含泥量、压碎值、吸水率等）都低于天然集料，但符合规范要求。随着水泥稳定碎石中再生集料占比增加，全再生集料混合料比天然集料混合料最大干密度所需最佳含水率增加了20.6%；再生集料水泥稳定碎石的7d和28d无侧限抗压强度呈下降趋势，与天然集料水泥稳定碎石对比，全替代再生集料水泥稳定碎石7d和28d强度分别下降36.2%和28.5%。研究表明再生集料基层能够满足建设要求，为工程应用提供了借鉴。关键词：公路工程水泥稳定碎石再生集料抗压强度中图分类号：U414文献标识码：A文章编号：1672-3791(2023)08-0104-04ResearchonPropertiesofCementStabilizedMacadamofRecycledAggregateswithDifferentReplacementRatesSHITuo1CHENShibin1*WANGZengqiang2YINZhuangfei2(1.KeyLaboratoryofRoadConstructionTechnologyandEquipmentofMOE,Chang'anUniversity,Xi'an,ShaanxiProvince,710064China;2.ShandongHi-speedRoad&BridgeCo.,Ltd.,Jinan,ShandongProvince,250014China)Abstract:Itisthegoalofgreenpavementconstructiontousewastecementconcreterecycledaggregateforcementstabilizedmacadambaseandrealizethefullreplacementofrecycledaggregateofbase.Inthispaper,thepropertiesofcementstabilizedmacadamofnaturalaggregateandrecycledaggregateunderdifferentreplacementrateswerecom‐paredandstudied.Testresultsshowthatthephysicalproperties(apparentdensity,siltcontent,crushingvalue,waterabsorption,etc.)ofrecycledaggregatewerealllowerthanthoseofnaturalaggregatebutmettherequirementsofthespecification,theoptimalmoisturecontentrequiredforthemaximumdrydensityoffullyrecycledaggregatemix‐tureincreasedby20.6%comparedwiththatofnaturalaggregatemixturewiththeincreaseoftheproportionofre‐cycledaggregateincementstab...
