A nondestructive method for evaluating the impermeability of mortar based on image processing

This paper proposes a new method, namely, the surface water-spray method, for rapid and convenient evaluation of mortar permeability. In this method, after sprayed a certain amount of water on mortar, the absorption process is recorded by smart phone and the water absorption rate of mortar is extracted by image processing. An index called K6th is extracted as an indicator of the rate of water absorption. The mortar permeability test method as specified under the Chinese national standard also were conducted and the results of it are used as a reference. Several groups of experiments were designed and conducted. An empirical formula was established between the K6th and the results of the standard method. Additional experiments were conducted to validate the results.