再生骨料在混凝土拌和物中的吸水特性研究  

Study on Water Absorption Characteristics of Recycled Aggregate in Concrete Mixture

作　　者：张政 任鹏 梁坤 展恩虎 朱磊 李一帆 Zhang Zheng;Ren Peng;Liang Kun;Zhan Enhu;Zhu Lei;Li Yifan

机构地区：[1]长安大学建筑工程学院

出　　处：《城市建筑》2022年第10期183-185,共3页Urbanism and Architecture

摘　　要：本文针对再生骨料混凝土在不同介质中的吸水特性,并以气干状态下的0.3~0.7水灰比制作的混凝土试块及废黏土砖作为再生骨料,通过测定试件在模拟混凝土拌和物环境及清水中的吸水率变化,根据实验结果研究吸水特性。发现不同水灰比的混凝土再生骨料在清水中的吸水率随其水灰比的增大而增大,观察到水灰比为0.5的再生骨料混凝土试块,在加入缓凝剂的水胶比为0.3的水泥净浆中吸水速率降低极为明显。该结论为再生骨料在混凝土拌和物中的吸水特性研究提供了参考依据,对日常建筑施工作业中再生骨料混凝土砂浆拌和起到一定的指导性作用,验证了再生骨料吸水率极高的特性。In this paper,according to the water absorption characteristics of recycled aggregate concrete in different media,the water absorption characteristics of recycled aggregate concrete are studied according to the experimental results by measuring the water absorption changes of the samples in the simulated concrete mixture environment and in the clean water,and taking the concrete blocks and waste clay bricks made with the water cement ratio of 0.3~0.7in the air dry state as recycled aggregate.It is found that the water absorption of recycled aggregate increases with the increase of water cement ratio.It is observed that the water absorption rate of recycled aggregate concrete with water cement ratio of 0.5 decreases obviously in the cement paste with water cement ratio of 0.3.The conclusion provides a reference for the research on the water absorption characteristics of recycled aggregate in concrete mixture,plays a guiding role in the daily construction operation of recycled aggregate concrete mortar mixing,and verifies the high water absorption characteristics of recycled aggregate.

关 键 词：再生骨料 混凝土拌和物 吸水特性 

分 类 号：TU528.59[建筑科学—建筑技术科学]