Permeability testing method of water-permeable paving material, and special tester thereof

Abstract

The invention discloses a permeability testing method of a water-permeable paving material. The method comprises the following steps of: (1) preparing a sample, namely designing the sample in a mixing proportion according to the requirement of different porosities, preparing the sample and maintaining the sample; (2) wetting the sample to be used for testing, and wiping away the residual water bead; (3) coating seepage-proofing materials on side walls at the periphery of the sample; (4) performing a water spraying test above the sample, wherein one part of water forms surface runoff on the sample and the other part of water permeates through the sample to form seepage; and (5) observing the water spraying flow, the surface runoff flow and the seepage flow, changing the size of the spraying water flow, and measuring the maximum value of the seepage flow to obtain the measured permeability coefficient. The method has the advantages that: the permeability test of the water-permeable paving material under the rainfall imitation condition can be realized, and the size of the imitated rainfall and the thickness of the water-permeable paving material can be adjusted.

Description

A method for testing the permeability of a water-permeable paving material and a special tester thereof technical field The invention relates to a method for testing the permeability of a water-permeable pavement material and a special tester thereof, belonging to the technical field of testing the water-permeable pavement material. Background technique At present, there are usually two methods for testing the permeability of water-permeable materials: constant head test method and variable head test method. Generally, the constant head test method is suitable for the test of permeable materials with high permeability; the variable head test method is suitable for the test of small or non-permeable materials. At the same time, both methods carry out the penetration test under the premise that the material is subjected to pressurized water. The variable head test method is not suitable for testing permeable materials with high permeability. As a pavement material, perviou...

AI Technical Summary

Problems solved by technology

The present invention aims to solve the problem that the existing detection method for the permeability of water-permeable materials is not suitable for detecting the permeability of water-permeable pavement materials, and provides a water-permeable pavement material permeability test suitable for detecting the permeability of water-permeable pavement materials Method and its special tester

Images