In order to explore the sulfate resistance of concrete mixed with basalt fiber,the experiment investigation on the sulfate resistance of basalt fiber concrete under different erosion environments was studied by adding basalt fiber with volume content of 0,0.1％,0.2％and 0.3％into the concrete samples,taking the appearance,mass loss rate and compressive strength of the samples as the main evaluation indexes.The results show that the specimen with 0.2％volume content has the best performance in mass loss rate and compressive strength,while the specimen with 0.1％volume content has the largest increase in flexural strength.The fluctuation range of appearance,quality and compressive strength of specimens under dry wet cycle is larger than that under natural erosion environment,and the shorter the dry wet cycle is,the more serious the erosion degree is.The microstructure analysis of the specimen shows that there is a small amount of C-S-H(hydrated calcium silicate),Ca(OH)2 and other hydration products in the concrete specimen due to the hydration of cement before erosion.Adding basalt fiber can tighten the internal bond of the concrete,slow down the internal cracks of the specimen development,reduce the generation of erosion products,and improve the mechanical properties of the concrete to a certain extent.
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