Table of fitted functions.

In order to fully assess the protection of Limestone cultural relics from all forms of deterioration in Zhejiang Province, this study explored the relationship between the strength, longitudinal wave velocity and water absorption of limestone surface through indoor and field tests, and obtained a set of scientific evaluation methods for evaluating the surface weathering degree of limestone cultural relics. The results show: the surface layer strength of limestone and water absorption, longitudinal wave velocity and water absorption have obvious laws, good fitting effect, all have strong negative correlation; the humidity environment has a greater effect on the water absorption of limestone surface layer, the lower the humidity of the test environment, the more obvious the pattern between the strength of limestone surface layer, longitudinal wave velocity and water absorption. The study of water absorption on rock surfaces concluded that water absorption is closely related to the degree of weathering, which plays an important role in the further conservation of limestone cultural relics.