濮 琦1,薛万银1,蒋林华2,奚飞达1,张承志1,戴大力3,谢鑫如4
濮琦,薛万银,蒋林华,等.冻融循环作用下混凝土断裂损伤特性研究[J].混凝土与水泥制品,2020(7):30-33.
PU Qi,XUE Wan-yin,JIANG Lin-hua,et al.Research on the Fracture Damage Characteristics of Concrete Under Freeze-Thaw Cycle [J].China Concrete and Cement Products,2020(7):30-33.
冻融循环作用下混凝土断裂损伤特性研究
濮 琦1,薛万银1,蒋林华2,奚飞达1,张承志1,戴大力3,谢鑫如4
濮琦,薛万银,蒋林华,等.冻融循环作用下混凝土断裂损伤特性研究[J].混凝土与水泥制品,2020(7):30-33.
PU Qi,XUE Wan-yin,JIANG Lin-hua,et al.Research on the Fracture Damage Characteristics of Concrete Under Freeze-Thaw Cycle [J].China Concrete and Cement Products,2020(7):30-33.
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。
Abstract: 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.
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