基材的初始透水性对涂料透水性试验的影响

Effect of Initial Water Permeability of Substrate on Water Permeability Test of Coating

为了进一步揭示基材对涂料透水性的影响,考察了贮存于环境温度(23±2)℃、相对湿度(50±5)%标准条件下的无石棉纤维水泥板的初始透水性随时间推移的稳定情况;研究了不同初始透水性的无石棉纤维水泥板对涂料透水性试验的影响。结果显示:最长经过360d的贮存后,所有试板的初始透水性均未发生明显变化;不同初始透水性的无石棉纤维水泥板对涂料的透水性有很大的影响。

In order to further reveal the influence of substrate on water permeability of coatings,the stability of the initial water permeability of non−asbestos free cement sheets stored under the standard conditions of ambient temperature(23±2)℃and relative humidity(50±5)%over time was investigated.Then,the influence of non−asbestos free cement sheets with different initial water permeabilities on coating water permeability test was studied.The results showed that the initial water permeabilities of all test sheets had not changed significantly after 360 days of storage.And the non−asbestos free cement sheets with different initial water permeabilities had a great influence on the water permeability of the coating.