Device and method for testing water permeability parameter of macroporous water-permeable material

The invention belongs to the technical field of concrete water permeability testing, and provides a device and method for testing water permeability parameters of a macroporous water-permeable material, the device comprises a water tank, and the top of the side wall of the water tank is fixedly communicated with a first faucet and a second faucet; macropore concrete samples are arranged in the middles of the container assemblies, the bottom of the water tank is communicated with the tops of the container assemblies through the variable-length pipe assemblies, the bottom of the side wall of each container assembly is communicated with a fourth faucet, and the side wall of each container assembly is further communicated with an upper end water head reading pipe and a lower end water head reading pipe; the macroporous concrete sample is positioned between the upper end water head reading tube and the lower end water head reading tube; the measuring cylinder is used for containing water flowing out of the fourth