砖混类建筑垃圾再生混凝土路面砖的早期强度试验研究  

Experimental study on early strength of concrete pavement brick fabricated with constructional brick-concrete recycled aggregate

作　　者：吴珀宇 陈鑫 沈玲华 周良燕 金斌斌 冀哓华 王激扬[1] WU Poyu;CHEN Xin;SHEN Linghua;ZHOU Liangyan;JIN Binbin;JI Xiaohua;WANG Jiyang(College of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310058,China;Hangzhou Qianjiang New City Municipal Garden Construction Co.,Ltd.,Hangzhou 310021,China;School of Civil Engineering and Architecture,Zhejiang University Science&Technology,Hangzhou 310023,China)

机构地区：[1]浙江大学建筑工程学院,浙江杭州310058 [2]杭州钱江新城市政园林建设有限公司,浙江杭州310021 [3]浙江科技学院土木与建筑工程学院,浙江杭州310023

出　　处：《混凝土》2021年第5期108-112,126,共6页Concrete

基　　金：国家自然科学基金(51578495,51708506);浙江省自然科学基金(Y20E080024);浙江省建设科研项目(2018K012)。

摘　　要：在对建筑砖混垃圾破碎料进行筛分、分类、调整级配的基础上,制备了建筑砖混垃圾再生混凝土路面砖,并进行了早龄期基本力学性能试验。结果表明:(1)再生砖混骨料中废砖吸水量最大,影响再生混凝土路面砖制备过程中的水灰比控制及强度提升,需计算额外用水量;(2)再生砖混骨料混凝土路面砖的早期抗压、抗折强度随着水灰比的减小而增大,基本呈线性拟合关系;(3)掺入质量比3%以下的轻质物垃圾含有量对路面砖早期抗压、抗折强度的影响不显著。因此,在建筑砖混垃圾原材料及配合比条件下,制备的再生混凝土路面砖早期强度能满足路面砖规范要求。Based on the screening,classification and grading of the constructional brick-concrete waste crushed material,the constructional brick-concrete waste recycled concrete pavement bricks were fabricated,and the basic mechanical performance test of the early age strength was carried out.The results show that(1)the water absorption of the bricks of the recycled brick aggregate is large,which affects the water-cement ratio control and strength improvement during the fabrication of recycled concrete pavement bricks,and additional water consumption needs to be calculated.(2)the early compressive and flexural strength of concrete pavement bricks using recycled brick-concrete aggregate increase as the water-cement ratio decreases,which is basically a linear fitting relationship.(3)the influence of the content of light-weight materials with a mass ratio of less than 3%on the early compressive and flexural strength of pavement bricks is not significant.Therefore,under the conditions of the raw materials and mixing ratio of the building brick-concrete waste in this study,the early strength of the recycled brick-concrete pavement bricks can meet the requirements of the pavement brick standard.

关 键 词：建筑砖混垃圾 再生混凝土 路面砖 水泥骨料比 

分 类 号：TU528.7[建筑科学—建筑技术科学]