摘要
砖粉碎料的含量影响水泥稳定再生集料的力学性能.本文采用试验研究了水泥含量、砖粉碎料掺量和养护龄期对水泥稳定再生集料力学性能的影响,建立了这3种因素与无侧限抗压强度、劈裂强度、抗压回弹模量和抗冻性能的关系.试验结果表明,随着砖粉碎料掺量的减少,水泥稳定再生集料的最大干密度增大,其最佳含水量减小;随着水泥含量的减少,水泥稳定再生集料的最大干密度减小,其最佳含水量基本不变;不同龄期水泥稳定再生集料的无侧限抗压强度、劈裂强度、抗压回弹模量和抗冻性能都随着砖粉碎料掺量的增加而降低,随着水泥含量的增加而增加;以水泥含量和砖粉碎料掺量为变量建立了含砖粉碎料水泥稳定再生集料的无侧限抗压强度、劈裂强度和抗压回弹模量计算公式.
The content of crushed brick affects the mechanical properties of cement stabilized recycled aggregates.The effects of cement content,crushed brick content and curing time on the mechanical properties of cement stabilized recycled aggregates were studied through tests in this paper.The relationships between the three variables and unconfined compressive strength,splitting strength,compressive resilient modulus and the frost resistance were established.The results show that,with the decreasing content of crushed brick,the maximum dry density of cement stabilized recycled aggregates increases,but the optimal moisture content decreases;the decrese of the cement content reduces the maximum dry density of cement stabilized recycled aggregates,but the optimal moisture content remains the same in general.The unconfined compressive strength,splitting strength,compressive resilient modulus and frost resistance of cement stabilized recycled aggregates decrease with the increase of crushed brick content,and go up with the increase of cement content for various curing time.Taking the contents of cement and crushed brick as variables,the calculation formulas of the unconfined compressive strength,splitting strength and compressive resilient modulus of cement stabilized recycled aggregate with crushed brick were established.
作者
周芬
张力
杜运兴
ZHOU Fen;ZHANG Li;DU Yunxing(College of Civil Engineering,Hunan University,Changsha 410082,China)
出处
《湖南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2020年第5期134-140,共7页
Journal of Hunan University:Natural Sciences
基金
湖南省自然科学基金资助项目(2018JJ2050)
长沙市科技计划重大专项资助项目(kq1703002,kq1804002)
长沙市科技计划资助项目(kq1907101)。
关键词
建筑垃圾
砖粉碎料
再生集料
水泥稳定基层
力学性能
construction and demolition waste
crushed brick
recycled aggregates
cement stabilized base
mechanical properties
