GB/T 13477.20-2017 in English

《GB/T 13477.20-2017建筑密封材料试验方法 第20部分：污染性的测定》由TC195（全国轻质与装饰装修建筑材料标准化技术委员会）归口，TC195SC3（全国轻质与装饰装修建筑材料标准化技术委员会建筑密封材料分会）执行，主管部门为中国建筑材料联合会。

Scope

This part of GB/T13477 specifies the method for the determination of the pollution of building sealing materials. This part is applicable to the determination of the pollution of sealing materials on porous substrates (such as marble, limestone, sandstone or granite) in building joints. Test method A is applicable to the test of determination of pollution under compression conditions, and test method A is applicable A test for the determination of contamination under non-compressive conditions. Note, this test method is to evaluate the possibility of early contamination on the surface of porous substrates due to the coating of the internal substances of the sealing material. materials or other porous substrates. During the accelerated test; if the sealing material does not cause pollution or discoloration to the substrate, it does not mean that the test sealing material will not pollute or discolor the porous test substrate after long-term use. The experience of many countries shows that using similar test methods to compress the test piece can further accelerate the generation of pollution.