农作物秸秆砖砌体干燥收缩试验研究  

Experimental study on drying shrinkage performance of crop straw brick masonry

作　　者：赵文兰[1] 王刚 姚志斌 姚瑞[1] ZHAO Wenlan;WANG Gang;YAO Zhibin;YAO Rui(School of Civil Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学土木工程学院,河南郑州450001

出　　处：《新型建筑材料》2018年第10期98-101,105,共5页New Building Materials

基　　金：河南省新型墙体材料专项基金(豫建墙2017-19)

摘　　要：农作物秸秆砖砌体在使用阶段的干燥收缩对控制墙体的干燥收缩裂缝十分重要。通过对农作物秸秆砖砌体在自然养护环境中连续42 d的干燥收缩变形试验研究,分析了龄期、砂浆强度及约束条件对农作物秸秆砖砌体收缩变形的影响,并提出了考虑这些因素的无约束农作物秸秆砖在M5和M7.5级混合砂浆砌筑砌体的自由干燥收缩变形估算公式。研究结果可为农作物秸秆砖砌体的应用提供参考。The value of drying shrinkage of the crop straw brickmasonry in service stage is very important to control the dry- ing shrinkage crack in masonry wall. Based on the test for the drying shrinkage performance of crop straw brick masonry cured in natural environment within 42 days,the main factors affecting the drying shrinkage performance such as the curing age,the mortar strength and the restricting condition are discussed and analyzed. The formulas which estimating the free drying shrinkage deforma- tion of crop straw brick masonry without restricting are suggested with M5 and M7.5 mixed mortar. The research results can provide reference for the application of crop straw brick masonry in engineering.

关 键 词：农作物秸秆砖 砌体 干燥收缩 变形 

分 类 号：TU552.1[建筑科学—建筑技术科学]