摘要
为研究冻融作用对混凝土断裂性能的影响,测试了不同水胶比(0.4、0.5、0.6),含气量(1.6%、6%),以及粉煤灰掺量(0、30%)三因素下混凝土的断裂能。研究结果表明,随着冻融循环次数的增加,混凝土的断裂能逐渐降低。低水胶比和合理的引气能够提高冻融作用下混凝土的抗开裂性能,掺入30%的粉煤灰降低了混凝土的抗冻性。
In order to study the effect of freezing and thawing on the fracture performance of concrete,three factors such as water-binder ratio of 0.4,0.5,0.6,fly ash content of 0 and 30%,gas content of 1.6%and 6%were designed to study the fracture performance of concrete.The results show that as the number of freeze-thaw cycles increases,the concrete fracture energy gradually decreases.Low water-binder ratio and reasonable air entrainment can improve the crack resistance of concrete under freeze-thaw cycle.The addition of fly ash reduces the freezing resistance of concrete.
作者
濮琦
薛万银
蒋林华
奚飞达
张承志
戴大力
谢鑫如
PU Qi;XUE Wan-yin;JIANG Lin-hua;XI Fei-da;ZHANG Cheng-zhi;DAI Da-li;XIE Xin-ru(Suzhou concrete and cement products research institute Co.,Ltd.,215004,China;Hohai University,Nanjing 210098,China;Suzhou Jiasheng Yuanda Construction Industry Co.,Ltd.,215100,China;Wuxi Xinle Communication Equipment Co.,Ltd.,214252,China)
出处
《混凝土与水泥制品》
北大核心
2020年第7期30-33,共4页
China Concrete and Cement Products
基金
国家重点研发计划资助(2017YFB0310000)
广西水工程材料与结构重点实验室资助课题(GXHRI-WEMS-2019-04)。
关键词
冻融循环
断裂能
混凝土
粉煤灰
水胶比
含气量
Freeze-thaw cycle
Fracture energy
Concrete
Fly ash
Water-binder ratio
Gas content
