As per EN 1062-1, Crack-bridging shall be determined in and classified as:
The test temperature for the classification A1 is 23 °C. As test temperature for classes A2 to A5 -10 °C is recommended. Other test temperatures can be agreed between the interested parties, e.g. 10 °C, 0 °C, -10 °C, - 20 °C, -30 °C and -40 °C. In this case the test temperature shall be included in parentheses after the class, e.g. A4: (-20 °C).
This test method is used to indicate a waterproofing membrane's ability to maintain its integrity while bridging a preexisting crack in the substrate at low ambient temperatures, when the membrane is least likely to be flexible.
This test method covers a laboratory procedure for determining the ability of a waterproofing membrane to bridge a crack in the substrate.
At LAB, the testing will be done as follows:
At site level also this can be tested as follows:
If no any cracks were observed, then membrane is very good to use.
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