Abstract: In order to explore the impact of basalt fiber(BF)on the durability and service life of aeolian sand concrete(ASC), this experiment used aeolian sand to replaced river sand, and the mass of aeolian sand accounts for 20% of the mass of river sand in the concrete after replacement, and the basalt fiber aeolian sand concrete(BF-ASC)was prepared under the conditions of 0, 0.05%, 0.10%, 0.15%, and 0.20% BF content. The effects of different BF content on concrete mass and relative dynamic elastic modulus were studied, and the damage and deterioration mechanisms of BF-ASC was analyzed by scanning electron microscopy(SEM). With the relative dynamic elastic modulus of BF-ASC test block as the degradation index, a single Wiener function was used to model the degradation process and predict the life of BF-ASC. The results showed that adding BF could reduce the porosity of ASC, enhance the bonding strength between coarse and fine aggregates, significantly improve the frost resistance of concrete, and reduce the freeze-thaw damage degree of concrete. When the volume fraction of BF was 0.20%, the mass loss rate was the lowest, the relative dynamic elastic modulus evaluation parameter had the smallest decrease, and the frost resistance effect was the best; The reliability function of BF-ASC obtained based on Wiener random distribution with BF-ASC relative dynamic elastic modulus as the degradation index could effectively predict the service life of BF-ASC in salt freezing environment, and the longest service life could reach about 2 500 hours when the BF volume fraction was 0.20%.

Key words: wind sand concrete, basalt fiber, durability, life prediction, unary Wiener