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Study on performance deterioration and life prediction of reed straw-recycled brick aggregate concrete after freeze-thaw cycle

Year: 2024
Type: article
Abstract: The current rate of carbon dioxide emissions poses a significant threat to global climate, making it increasingly important and urgent to lead the carbon-intensive construction industry to achieve carbon neutrality. Currently, the most practical method involves reusing waste materials. In this study, waste red bricks were used to replace 75% of natural aggregates in concrete, and three different forms of reed stalks (including reed straw ash, reed straw strips, and reed straw powder) were added to prepare the concrete. Freeze–thaw tests were carried out for 25, 50, 75, and 100 cycles in water and sodium sulfate solution to establish a freeze–thaw deterioration model and perform life prediction. The results showed that the degree of freeze–thaw deterioration of the specimens in sulfuric acid solution was small, and the degree of deterioration of reed powder concrete and reed gray concrete was more serious than reed strip concrete and additive-free concrete. After 100 water freeze–thaw cycles, the strength losses of the specimens were 21.55%, 21.7%, 18.71%, and 20.54%, and the relative dynamic elastic modulus losses were 6.11%, 7.25%, 4.39%, and 5.79%. The fitting results showed that the predicted values of the parabolic model and two-parameter Weibull distribution damage model were closer to the experimental values. The life prediction results showed that the freeze–thaw resistance of reed-brick aggregate recycled concrete met the durability requirements in the south region of China, and the RSAC-T and RSAC-0 group concrete could also be used in projects with lower frost resistance requirements in the north region of China.
DOI: 10.1016/j.cscm.2024.e03728
Language: English
Open Access status: gold
Estimated APC paid: $2,110
OpenAlex ID: W4402395899
FWCI: 2.609
Cites: 74
Cited by: 14
Related to: 10