Method for testing permeability resistance of concrete

Abstract

The invention relates to a method for testing the permeability resistance of concrete, and belongs to the field of tests. The method is characterized by comprising the following steps of: a, heating a test mold for concrete permeability resistance test to 65-70 DEG C in an oven; b, carrying out roll coating of hot wax on the periphery of a test block; c, quickly putting the wax coated test block into the test mold, wherein the diameter of the top of the test mold is greater than that of the bottom of the test mold; d, tightening an ejection device to press the test block into the test mold, and implementing wax sealing between the test block and the test mold; e, fixing the test mold filled with the test block on a tester platform by using bolts; f, opening a pressure water valve to pressurize the test block, and performing permeability resistance test; g, keeping the water pressure unchangeable after the test is completed, loosening screw caps of the ejection device by using a spanner, and extruding the test block out from the test mold by virtue of pressure water; and h, closing the pressure water valve, detaching the fixing bolts between the test mold and the tester platform, taking the test mold out, and thus completing the test.

Description

technical field [0001] The invention relates to the field of impermeability index testing of impervious concrete for civil engineering. The test mold for impervious experiments is suitable for measuring the impermeability grade of concrete after hardening of impervious concrete test blocks. The invention belongs to publication number CN102042946A and application number 2009102068455 "concrete Divisional application for test mold for impermeability test. Background technique [0002] detailed figure 1 The traditional test mold for this technology is a circular table tube with a bottom inner diameter of 186mm, a top inner diameter of 176mm, and a height of 150mm. According to the size of the test mold 1, the concrete test block 2 is made correspondingly, and after hardening reaches a certain strength, the surrounding area is rolled with hot wax 3 , and then two people use the special pressurization device 4 to press the test block into the test mold, and then withdraw the pr...

AI Technical Summary

Problems solved by technology

In this process, due to the withdrawal of the pressure to take the test mold and the cooling deformation of the test mold, it is very easy to cause relative sliding between the test mold and the test block, and the solidified wax seal layer between the damage cannot guarantee the gap between the test block and the test mold. The sealing of the test block will cause water seepage between the test block and the test mold during the experiment. It cannot guarantee that all the test pressure water will press the test block and accurately measure the impermeability level of the test block.

In addition, it is inconvenient to take out the test block from the test mold after the test is completed. It is necessary to use a special pressure device to push the test block out of the test mold again.

This operation is laborious, time-consuming, complicated, and cannot guarantee the accuracy of the test results.

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