Grey relational analysis on strength loss rate in freeze-thaw cycles of polypropylene fiber concrete

Using the grey relational analysis of grey system theory, the correlation of four main parameters of the effect strength loss rate of polypropylene fiber concrete on freeze-thaw cycles: water-cement ratio, volume fraction of fiber, fly ash content, and superplasticizer content was analyzed based on literature, and using the grey prediction model, the GM(1, N) equation of the strength loss rate of polypropylene fiber concrete in freeze-thaw cycles was established. The results showed that influencing factors of the strength loss rate of polypropylene fiber concrete in freeze-thaw cycles were as follows: water-cement ratio > superplasticizer content > fly ash content > volume fraction of fiber. The results of grey forecasting model GM(1, 5) showed good agreement with the experimental results. It was shown that could effectively predict the strength loss rate of polypropylene fiber concrete in freeze-thaw cycles by using the method of grey relational analysis.