Frost Resistance Durability and Damage Model of Fiber Concrete in Tibet Plateau Area

Abstract

Abstract: In order to investigate the frost resistance durability and evolution law of freeze-thaw damage on different fiber concrete under environmental conditions of the Tibet Plateau area, this paper relies on a concrete road project in the Naqu area of Tibet, the freeze-thaw cycle test and related mechanical tests were conducted on ordinary fiber concrete (NC), abrasion fiber concrete (CM) and expansive fiber concrete (PZ). On the basis of the experimental study, a freeze-thaw damage model was established under low pressure environment of the plateau. The results show that abrasion fiber concrete (CM) has the best frost resistance durability based on the results of freeze-thaw cycle test, while the three kinds of fiber concrete are ranked as CM>NC>PZ in terms of frost resistance durability. According to the freeze-thaw damage model and the predicted flexural strength equation based on the model which are established in this paper, the test data of high cold air-entraining concrete from a high-speed project in the Tibet Plateau area are used for verification. It is found that the trend of the test values of flexural strength after freeze-thaw cycles are similar and coincided with the predicted values. Therefore, the freeze-thaw damage model for the flexural strength of the Tibet Plateau which is established in this paper can be probably reasonable and feasible.

Key words: Tibet Plateau area, admixture, fiber concrete, field test, frost resistance durability, damage model

CLC Number:

TU528

DENG Xianghui, ZHANG Peng, WANG Rui, WU Qiyuan, WANG Xu. Frost Resistance Durability and Damage Model of Fiber Concrete in Tibet Plateau Area[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2023, 42(9): 3143-3153.

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