Research on Influencing Factors of Water Resistance of Polymer Cement Waterproofing Coating
The effects of the types of polymer emulsion,the Tg value of polymer emulsion,the amount of cement,the types of filler and the amount of silane coupling agent on the tensile strength retention,elongation at break and water absorption of type Ⅱ JS waterproofing coating after immersion are studied in this article.The results show that the tensile strength and elongation at break of JS waterproofing coating decreased in varying degrees with the increase of immersion time;when butadiene styrene emulsion with Tg value of-15.3 ℃ is selected,cement content is at 50％,heavy calcium used as filler and appropriate silane coupling agent is added,the obtained JS waterproofing coating has better water resistance.
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