In order to meet the needs of depletion of natural sand and gravel resources and ecological protection in China,as well as to expand the application of recycled aggregate concrete in the field of municipal engineer-ing,the Box-Behnken response surface experiment was used to optimize the performance of basalt fiber recy-cled aggregate concrete,and the concrete water-cement ratio,fly ash content and basalt fiber content were se-lected as influencing factors,and the concrete workability and mechanical properties were comprehensively considered.The proposed quadratic term function can fit the experimental values well.According to the model,the optimal mix ratio is 0.396 for concrete,13.5%for fly ash and 0.75 vol.%for basalt fiber,and the fit be-tween the simulated and experimental values is high.
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