两种温度历程下高掺粉煤灰砼早期抗裂性综合评价  

Research on cracking resistance behavior of high volume fly ash concrete at early ages under two temperature histories

作　　者：赵志方[1] 陈静[1] 王卫仑[2] 赵志刚[3] 周厚贵 ZHAO Zhifang CHEN Jing WANG Weilun ZHAO Zhigang ZHOU Hougui(College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310014, China Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen University, Shenzhen 518060, China Zhejiang University of Media and Communications, Hangzhou 310018, China China Energy Engineering Group Co. , Ltd. , Beijing 100022, China)

机构地区：[1]浙江工业大学建筑工程学院,浙江杭州310014 [2]深圳大学广东省滨海土木工程耐久性重点实验室,广东深圳518060 [3]浙江传媒学院,浙江杭州310018 [4]中国能源建设集团有限公司,北京100022

出　　处：《浙江工业大学学报》2017年第4期449-453,共5页Journal of Zhejiang University of Technology

基　　金：国家自然科学基金资助项目(51479178);浙江省自然科学基金资助项目(LY14E090006);全国工程专业学位研究生教育指导委员会自选研究课题(教改项目)(2016-ZX-236);深圳大学广东省滨海土木工程耐久性重点实验室开放基金项目(GDDCE14-01;GDDCE15-01)的资助

摘　　要：为综合评价高掺量粉煤灰大坝混凝土早龄期的抗裂性,采用温度—应力试验机,研究35%,80%两种粉煤灰掺量的常态大坝混凝土在绝热与温度匹配模式下的综合抗裂性.结果表明:温度匹配模式下混凝土的抗裂性优于绝热温升模式;在两种温度历程养护模式下,80%粉煤灰掺量的混凝土相比于35%掺量的混凝土,有较低的温升值、室温应力以及开裂温度,较高的开裂应力和应力储备,并从开裂细化指标、开裂核心指标和开裂综合指标进行综合分析,得出高掺量粉煤灰混凝土具有更好的早龄期抗裂性.In order to comprehensively evaluate the cracking resistance behavior of high volume fly ash concrete at early ages, an experimental study on the cracking resistance behavior of normal dam concrete with 35% and 80% fly ash contents under the adiabatic mode and temperature matching curing （TMC） mode is conducted by TSTM tests. The results show that the cracking resistance of concrete under the TMC mode is superior to that under the adiabatic mode. Compared with the concrete with 35% fly ash content, the high volume fly ash concrete has a lower temperature rise, room temperature stress and cracking temperature, and a higher cracking stress and stress reserve. In addition, the high volume fly ash concrete has better cracking resistance behavior at early ages by a comprehensive analysis of the cracking refinement, cracking core and cracking comprehensive indexes.

关 键 词：高掺量粉煤灰混凝土 早龄期 抗裂性 温度-应力试验 

分 类 号：TU528[建筑科学—建筑技术科学]