Conditions for ventilating aging test of building waterproof materials
The "GB 18244-2000 Aging Test Method for Building Waterproof Materials" standard applies to the comparison of aging resistance of asphalt-based coils and coatings, synthetic polymer coils and coatings used in building waterproofing engineering, among which are heat aging tests (ie, ventilation Aging test) The conditions are explained in detail. The test conditions of the ventilating aging test chamber are as follows:
1. Test temperature
Determine the test temperature according to the requirements of the material and the purpose of the test. Asphalt-based waterproof materials are usually 70 ℃, synthetic polymer materials can be 80 ℃, etc., within the range of 50 ~ 100 ℃, the temperature tolerance is ± 1 ℃; in the range of 101 ~ 200 ℃, the temperature tolerance is the test temperature ± 1%.
Second, the test cycle
The test period should be determined according to the material characteristics. Generally, a specified exposure time or the exposure time when the performance changes to a specified value is the test termination time, usually 168h or longer.
3. Ventilation rate
The ventilation rate of the ventilation type aging test box can be selected according to the characteristics and quantity of the samples. It is best to conduct the aging test for the samples that affect each other. It is best to test the samples if they cannot be confirmed whether they have an effect Use a larger ventilation rate.
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