Research on strength distribution of natural pumice concrete based on precast porosity

In this study, the rubber natural pumice concrete was taken as the research object, and the orthogonal test method was employed to design the experiment, the rubber particles were added to the concrete as precast pores to test the actual porosity, compressive strength and splitting tensile strength of the natural pumice concrete under different precast porosities. According to the change rule, the actual porosity, compressive strength and split tensile strength distribution were respectively fitted. The results show that there is a good correlation between the actual porosity of natural pumice concrete and the precast porosity, and then the empirical formula of rubber particle content and concrete strength is established, which provides a certain theoretical reference for the research on the porosity of natural pumice concrete.