Study on the Stain Resistance of Exterior Wall Coatings under Natural Condition
With the improvement of people's living standards and the development of the construction industry,the stain resistance of exterior wall coatings has become an important index.In this study,the test plates of exterior wall coatings were placed under natural condition,the surface reflectivity was continuously measured,the experimental results of the natural condition and artificial stain resistance using standard ash were statistically analyzed.The results showed that the surface pollution degree and the percentage decline of reflectivity increase continuously during the outdoor placement of sample plates,and the maximum is 17%after 7 months.There are some differences between the results measured from natural condition and artificial stain resistance test in the laboratory,indicating that the relevant standard need to be further improved to match realistic results.The possible improvement ideas of the stain resistance test methods of exterior wall coatings were proposed,which provided references for the development of stain-resistant exterior wall coatings products and the revision of relevant standards.
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