Study on the correlation analysis between compressive strength and rebound value of volcanic stone concrete

Currently, the existing local standards for the rebound method or industry standards recommended regression curves for the determination of the compressive strength of volcanic concrete often show significant errors, making it impossible to achieve the specified values, and thus failing to meet the acceptance criteria. This study conducts research and analysis on the correlation between compressive strength and rebound value of volcanic stone concrete. Through regression fitting and Pearson correlation coefficient analysis, it is found that there is a linear correlation between compressive strength and rebound value of volcanic stone concrete of different strength grades, and regression equations are obtained. According to the obtained regression equations to evaluate the volcanic concrete when the results obtained good, low error, for the corresponding specification modification put forward a guiding opinion, at the same time for the follow-up concrete related to the correlation between the compressive strength and rebound value of the correlation analysis provides guidance.