摘要
工程开挖土和拆除类建筑垃圾是现阶段存有量和产生量均巨大的废弃物,面临着拓展应用范围的实际需要。采用SEM、超景深图像分析、导热系数测试等手段分析了不同配合比下废砖再生粗、细骨料(RBG、RBA),废混凝土再生粗、细骨料(RCG、RCA)对生土材料性能的影响。结果表明:再生骨料的掺加有利于提高生土材料的密实度和强度,当掺加10%RCA与30%RCG时,生土材料的最大干密度和28 d抗压强度分别较未掺时提高了12.7%和33.0%。掺加再生骨料可以优化生土材料的孔隙结构,改善其耐水性能,且不影响其导热性能。
Construction waste resulting from soil excavation and building demolition is currently a huge amount of waste,which face the practical need to expand their application scope.This article uses SEM,depth of field image analysis,and thermal conductivity testing,to analyze the impact of recycled coarse and fine aggregates(RBG、RBA)mixed with waste bricks,recycled coarse and fine aggregates(RCG、RCA)mixed with waste concrete on the properties of natural soil materials under different mix proportions.The experimental results indicate that the addition of recycled aggregates is beneficial for enhancing the compaction and strength of natural soil materials.When 10%RCA and 30%RCG are added,the maximum dry density and 28 d compressive strength of the natural soil increased by 12.7%and 33.0%,respectively.Adding recycled aggregates can optimize the pore structure of natural soil materials,improve their water resistance without affecting its thermal conductivity.
作者
刘宇
周理安
周文娟
刘洋
LIU Yu;ZHOU Li'an;ZHOU Wenjuan;LIU Yang(School of Civil and Transportation Engineering,Beijing University of Civil Engineering and Architecture,Beijing 100044,China;Beijing Energy Conservation&Sustainable Urban and Rural Development Provincial and Ministry Co-construction Collaboration Innovation Center,Beijing 100044,China;Dandong Natural Resources Affairs Service Center,Dandong 118000,China)
出处
《新型建筑材料》
2024年第4期41-45,共5页
New Building Materials
基金
国家自然科学基金项目(5160082245)。
关键词
生土材料
再生骨料
物理性能
力学性能
耐水性能
raw soil materials
recycled aggregates
physical performance
mechanical properties
water resistance
