I. Purpose and scope of application
The method stipulates the method and steps of the cement concrete impermeability test.
The method is suitable for detecting the waterproof performance of concrete after hardening to determine its impermeability rating.
Second, the equipment
Concrete penetrator, forming test mode, screw presser, sealing material
Third, the test steps
1
After the test piece has expired, remove the surface, wipe the surface, and brush the two end faces with a wire brush. After the surface is dry, roll a layer of molten sealing material on the side of the test piece, and then immediately press it through the oven on the screw presser. Or in the pre-heated test mold of the electric furnace, the bottom surface of the test piece and the bottom of the test mold are flush, and after the test mold is cooled, the pressure can be released and installed on the permeameter for testing.2
During the test, the water pressure is from0.1MPa
Start, every8h
Increase water pressure0.1MPa
And always pay attention to observe the end face of the test piece, always added6
Among the test pieces3
The surface of the test piece was found to seep water, and the water pressure at this time was recorded to stop the test.Fourth, the test results calculation
S
=10H
-1
S
- concrete impermeability markingH
- Water pressure at the top of the third test piece begins to seep
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