摘要
对建筑垃圾经过加工筛分后,设计了不同掺量及不同砖砼比例的建筑垃圾再生填料配合比,通过标准击实试验及承载比试验,对建筑垃圾作为路基填料的性能开展研究。结果表明:当建筑垃圾掺量一定时,随着建筑垃圾中砖砼比例的降低,再生路基填料的最大干密度不断增大、最佳含水率不断减小、CBR值不断增大;当建筑垃圾的砖砼比例一定时,随着建筑垃圾掺量的增加,再生路基填料的最大干密度先增大后降低、CBR值先增大后减小。当砖砼比例为1∶2,建筑垃圾掺量为40.5%时;再生路基填料干密度最大;对应的最大干密度为2.02g/cm^3;建筑垃圾掺量为29.6%时再生路基填料CBR值最大,对应的CBR值为45.5%。当建筑垃圾掺量为30%~40%时,再生路基填料的干密度及CBE值均较大,再生填料密实度高,可以用于公路路基。
The proportion and different proportion of brick and concrete of recycled aggregate of construction waste is designed after the construction waste is processed and screened.The performance of construction waste as subgrade filler is also studied,through standard compaction test and load bearing ratio test.The results show that,when the construction waste content is constant,the maximum dry density,optimal moisture content and CBR value of the reclaimed subgrade filler increased continuously with the decrease of the proportion of brick and concrete in construction waste.When the proportion of bricks and concrete of construction waste is fixed,the maximum dry density of reclaimed subgrade filler first increases and then decreases with the increase of construction waste content,and the CBR value first increases and then decreases.When the ratio of brick to concrete is 1∶2,the dry density of reclaimed subgrade filler is the highest,and the corresponding maximum dry density is 2.02 g/cm^3,when the proportion of construction waste is 40.5%;When the construction waste content is 29.6%,the CBR value of the reclaimed subgrade filler is the largest,and the corresponding CBR value is 45.5%.When the construction waste content is 30%~40%,the dry density and CBR value of the reclaimed subgrade filler are large,and the density of the reclaimed subgrade filler is high,which can be used for highway subgrade.
作者
刘喜
LIU Xi(School of Civil Engineering Zhengzhou Institute of Technology.Zhengzhou,Henan 450044,China)
出处
《公路工程》
北大核心
2019年第4期208-212,共5页
Highway Engineering
基金
河南省科技攻关项目(172102210382)
关键词
建筑垃圾
最大干密度
CBR
再生填料
砖砼比
construction waste
maximum dry density
CBR
regenerated filler
proportion of brick and concrete
