- 摘 要
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(1 长沙理工大学土木与建筑学院,长沙 410004; 2 湖南省建筑工程集团,长沙 410004)
[摘要]蒸压粉煤灰砖砌体在使用阶段的干燥收缩率对控制墙体的干燥收缩裂缝十分重要。对不同上墙含水率的蒸压粉煤灰砖砌体在不同环境湿度条件下的干燥收缩性能,以及蒸压粉煤灰砖的干燥收缩性能进行了试验,得到了不同上墙含水率的蒸压粉煤灰砖及其砌体在不同环境下的失水规律及干燥收缩规律。试验研究表明,砌筑前浇水的蒸压粉煤灰砖砌筑的砌体在干燥和中等环境下,《砌体结构设计规范》(GB50003—2001)中的砌体干燥收缩率取值偏小,不利于控制墙体干燥收缩裂缝。
[关键词]蒸压粉煤灰砖; 砌体; 干燥收缩; 含水率; 相对湿度; 裂缝Experiment of drying shrinkage of autoclaved fly-ash brick masonry
Liang Jianguo1, Cheng Shaohui2
(1 School of Civil Engineering & Architecture, Changsha University of Science & Technology, Changsha 410004, China;
2 Hunan Construction Engineering Group Corporation, Changsha 410004, China)
Abstract:The ratio of drying shrinkage of autoclaved fly-ash brick masonry in service stage is very important to control drying shrinkage cracks in masonry wall. By experimental study on drying shrinkage of autoclaved fly\|ash brick masonry with different relative moisture content in different relative humidity, and based on the tes