Method based on measurement of permeability of waterproof coating

Abstract

The invention discloses a measurement method based on the permeability of waterproof coatings. It is formulated into mortar, and the water-cement ratio is determined based on the water permeability of the mortar specimen under a pressure of 0.3-0.4 MPa. After demoulding, it is put into water for curing for 7 days. Take it out and wait for the surface to dry, seal it with a sealing material and put it into the permeameter to carry out the impermeability test of the mortar specimen. The preparation of the coating impermeability specimen is to remove the permeable mortar specimen from the permeation instrument. Evenly smear the mixed sample on the surface of the upper mouth, put the prepared impermeability test piece into the cement standard curing box and place it for 168h; take the impermeability test piece out of the cement standard curing box, place it under standard conditions, and wait for After the surface is dry, put it into the permeameter, carry out the impermeability test of the coating impermeability test piece according to the pressurization procedure described in the preparation of the sand-packed test piece, and record the water pressure at that time. The measurement result of the measurement method is accurate and the measurement efficiency is high, so that the parameters can be strictly controlled during the subsequent use of the paint, and the quality is guaranteed.

Description

technical field [0001] The invention relates to a method, in particular to a method for measuring the permeability of waterproof coatings. Background technique [0002] Paint, traditionally called paint in China. The so-called paint is coated on the surface of the object to be protected or decorated, and can form a continuous film firmly attached to the object to be coated, usually based on resin, oil, or emulsion, with or without adding pigments, fillers, adding The corresponding additives are viscous liquids prepared with organic solvents or water. The relatively authoritative book "Painting Technology" in the Chinese coatings industry defines it as follows: "Painting is a material that can be coated on the surface of an object by different construction techniques to form a firm adhesion, a certain strength, and a continuous coating. Solid film. The film formed in this way is commonly called coating film, also known as paint film or coating.” Coating, what we usually cal...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the low efficiency of the above-mentioned existing measurement methods, and the large error of the measurement results will seriously affect the production quality of subsequent coatings, which will lead to large fluctuations in quality. A measurement based on the permeability of waterproof coatings is designed. method, the measurement result of this measurement method is accurate, and the measurement efficiency is high, so that the parameters can be strictly controlled in the subsequent use of the coating, and the quality is guaranteed, which solves the problem of the low efficiency of the existing measurement method, and the large error of the measurement result, which is serious. Affect the quality of subsequent coating production, which will lead to the problem of large fluctuations in quality