基于多源异构的建筑垃圾再生料性能影响研究

摘要/Abstract

摘要： 为将建筑垃圾应用于道路工程建设,探究了不同配合比的水泥稳定建筑垃圾再生料路用性能的变化规律及其多源影响因素,选用多个建筑垃圾掺量(体积分数为20%、40%、60%、80%、100%)、三个砖砼比例(砖砼体积比为1∶1、1∶2、全砼)、两个水泥掺量(外掺质量分数为4%、5%)进行配合比设计,通过进行击实、无侧限抗压强度、劈裂强度试验及水稳定性、抗冻性能、干缩试验对路用性能及其变化规律进行了系统研究,并利用灰色关联分析算法分析集料中不同配合比变量对路用性能的影响程度大小。结果表明:随着建筑垃圾掺量的增加、砖砼比的增大、水泥掺量的减少,再生料的7、28 d无侧限抗压强度、劈裂强度、水稳定性、抗冻性能均有所降低;干缩系数随水泥掺量增加而增大;配合比变量对路用性能的关联度从大到小依次为水泥掺量、建筑垃圾掺量、砖砼比。在水泥掺量为4%、建筑垃圾掺量为80%、砖砼比为1∶2时仍可满足二级及以下公路中、轻交通的基层要求。

关键词: 建筑垃圾, 水泥, 道路工程, 路用性能, 砖砼比, 灰色关联分析算法

Abstract: To apply construction waste to road engineering construction, the variation law and multiple influencing factors of the road performance of cement stabilized construction waste recycled materials with different mix ratios were explored. The multiple construction waste content (volume fraction of 20%, 40%, 60%, 80%, and 100%), three brick concrete ratios (brick concrete volume ratios were 1∶1, 1∶2, full concrete) and two cement content (mass fraction of 4% and 5%) were used for mix ratio design. A systematic study was conducted on the road performance and its variation patterns through compaction, unconfined compressive strength, splitting strength tests, water stability, frost resistance and dry shrinkage tests. The grey relational analysis algorithm was used to analyze the degree of influence of different mix ratio variables in aggregates on road performance. The results indicate that with the increase of construction waste content, brick concrete ratio and cement content, the unconfined compressive strength, splitting strength, water stability and frost resistance of recycled materials at 7 and 28 d all decrease. The dry shrinkage coefficient increases with the increase of cement content, and the correlation degree between the mix ratio variables and road performance from high to low is cement content, construction waste content and brick concrete ratio. When the cement content is 4%, the construction waste content is 80% and the brick concrete ratio is 1∶2, it can still meet the grassroots requirements of secondary and lower level highways for medium and light traffic.

Key words: construction waste, cement, road engineering, pavement performance, brick concrete ratio, gray correlation analysis algorithm

中图分类号:

U411

孙吉书, 刘岚彬, 薛丹璇, 陈永昊. 基于多源异构的建筑垃圾再生料性能影响研究[J]. 硅酸盐通报, 2025, 44(3): 1091-1101.

SUN Jishu, LIU Lanbin, XUE Danxuan, CHEN Yonghao. Performance Impact of Construction Waste Recycled Materials Based on Multi Source Heterogeneity[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2025, 44(3): 1091-1101.

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