湖南大学学报（自然科学版）2012，Vol.39Issue(11)：13-19,7.
高温下复掺纤维RPC立方体抗压性能研究
Compressive Properties of Cubes Reactive Powder Concrete with Hybrid Fibers at Elevated Temperature
摘要
Abstract
In order to study the compressive properties of reactive powder concrete (RPC) at elevated temperature, 108 cube specimens (70. 7 mm×70. 7 mm×70. 7 mm) were prepared to study the group compressive strength of RPC with polypropylene fibers (PPF) and steel fibers. The influences of temperatures, hybrid fibers content and explosive spalling principles were investigated. The experiment results show that a PPF volume content of 0. 2% and a steel fiber volume content of 2% can prevent the explosive spalling of RPC and significantly increase cube compressive strength. The cube compressive strength decreased at 100℃ , compared to 20℃ and increased from 200℃ to 500℃ as compared to 100℃ , but decreased after 600℃. The cube compressive strength of RPC was lower as the fibers content increased before 300℃ , but was higher as fibers content increased beyond 300℃ when steel fibers was the same con-tent. Cube compressive strength of RPC was higher as the steel fibers content increased before 100℃ , but was lower as steel fibers content increased beyond 200℃ when PPF was the same content. Compared with the normal strength concrete and high strength concrete, the cube relative compressive strength of RPC was lower before 400℃ , but was higher between 500℃ and 800℃. The calculation formula of cube compressive strength at elevated temperature was obtained by fitting the curve of experiment data considering hybrid fibers content as temperature varied.关键词
高温下/活性粉末混凝土/抗压强度/爆裂/钢纤维/聚丙烯纤维Key words
elevated temperature/ reactive powder concrete/ compressive strength/ explosive spalling/steel fibers/ polypropylene fibers分类
建筑与水利引用本文复制引用
郑文忠,罗百福,王英..高温下复掺纤维RPC立方体抗压性能研究[J].湖南大学学报（自然科学版）,2012,39(11):13-19,7.基金项目
教育部长江学者奖励计划资助项目(2009-37) （2009-37）
教育部博士点基金资助项目(20092302110046) （20092302110046）
黑龙江省自然科学基金资助项目(E200916) （E200916）
哈尔滨工业大学"985工程"优秀科技创新团队建设项目 （）
