Effect of Ultra-low Temperature on Carbonation Performance of SFRRC and Prediction Model

Abstract

Through the rapid carbonation test of SFRRC with different fiber volume fractions at ultra-low temperature, the influence of ultra-low temperature damage on the carbonation resistance of SFRRC was analyzed, which provides a theoretical basis for the application of SFRRC in ultra-low temperature engineering. The experimental results show that ultra-low temperatures can significantly weaken the carbonization resistance of SFRRC. When the temperature reaches 160 °C, the carbonization depth increases by 67.66 % compared with the normal state. The proper amount of steel fiber has an evident influence on the carbonation resistance of the material. However, when the addition amount exceeds the optimum content, the carbonation resistance of the material decreases. The grey prediction model established by constructing the original sequence can reasonably predict the carbonation resistance of SFRRC after ultra-low temperatures.

Keywords

ultra-low temperature / SFRRC / carbonization / grey model

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