高温后砌体受压性能的试验研究  

EXPERIMENTAL RESEARCH ON COMPRESSIVE PERFORMANCES OF MASONRY AFTER BEIING SUBJECTED TO HIGH TEMPERATURE

作　　者：朱晶 冯世辉 梁思琪 刘劭同 郭清华 黄文宣[2] ZHU Jing;FENG Shihui;LIANG Siqi;LIU Shaotong;GUO Qinghua;HUANG Wenxuan(College of Civil Engineering and Architecture,Harbin University of Science and Technology,Harbin 150080,China;Key Lab of Structures Dynamic Behavior and Control of the Ministry Education,Harbin Institute of Technology,Harbin 150090,China)

机构地区：[1]哈尔滨理工大学建筑工程学院,哈尔滨150080 [2]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090

出　　处：《工业建筑》2021年第7期170-176,共7页Industrial Construction

基　　金：黑龙江省科学基金项目(LH2019E066);国家自然科学基金项目(51508140);大学生创新创业项目(202110214252)。

摘　　要：植物纤维增强碱矿渣胶凝材料是一种极具应用前景的新型绿色建材,既可有效利用矿渣、秸秆等工农业废弃物,降低成本,又能明显提升砌块砌体的抗裂性能。通过对60片不同纤维增强砌块砌体在常温和高温后的受压性能的试验,结果表明:植物纤维、聚丙烯纤维和微细钢纤维增强砌块砌体的强度等级相当于混凝土砌块MU7.5、MU10、MU15的砌体;而800℃高温后植物纤维仍对基体具有一定的增韧效果。通过回归分析,建立高温后植物纤维增强砌块砌体抗压强度计算方程。The plant-fiber-reinforced alkali-activated-slag cementitious material is a kind of new green building material with a great application prospect.The application of industrial and agricultural wastes such as slag and straw can be not only reduce the cost of construction cost,but also obviously improve the anti-cracking performances of the block masonry.The compressive performance tests were conducted on 60 pieces of block masonry constructed by different fiber-reinforced alkali-activated-slag cementitious material at normal temperature and after high temperature.The test result showed that the strength grades of fiber-reinforced block masonry constructed by plantfiber,polypropylene fiber or microsteel fiber were equivalent to the concrete block masory of MU7.5,MU10 and MU15 at normal temperature respectively.The plant fiber still had a certain toughening effect on masory after being subjected to 800℃.By means of regression analysis,an equation for calculating the compressive strength of plant-fiber-reinforced block masonry after being subjected to high temperature was constructed.

关 键 词：碱矿渣胶凝材料 砌块砌体 抗压强度 极限应变 弹性模量 

分 类 号：TU364[建筑科学—结构工程]