Study on freeze-thaw damage and life prediction of glass fiber recycled concrete
Four forms of GM(1,1)model were used to establish the prediction model of frost resistance of glass fiber recycled concrete.The frost service life of glass fiber recycled concrete in various regions was predicted.The correlation coefficient was introduced to compare and analyze the accuracy and long-term prediction results of each form of model,and compared with the Weibull prediction model.The results show that the attenuation rate of mass and relative dynamic elastic modulus of glass fiber recycled concrete gradually increases with the freeze-thaw cycle.The incorporation of glass fiber can effectively slow down the attenuation rate of mass and relative dynamic elastic modulus and delay the failure of recycled concrete.The prediction accuracy of the four forms of GM(1,1)models is grade Ⅰ when the glass fiber content is 0～1.0％,and the prediction accuracy is grade Ⅱ when the content is 1.5％.The DGM model had the highest accuracy and the largest correlation coefficients.It is recommended to use DGM model to predict the frost resistance.Considering the life prediction aspect,the prediction results of DGM model and Weibull model are basically similar,but the two models have different focuses.DGM model requires a smaller sample capacity and the Weibull model has a more accurate life prediction.
NETL
NSTL
万方数据
