Abstract
Epoxy floor coatings blistering sometimes occur when those are applied on concrete substrate. One of cause on this phenomenon was considered to be osmotic pressure owe to water in concrete. Recently in order to prevent epoxy floor coatings from blistering, some polymer cement mortar as underlayment material is often applied on concrete substrate, and epoxy floor coatings are applied on this underlayment one. But those polymer cement mortar is not effective in preventing epoxy floor coatings from blistering perfectly. So at first we have studied the relationship between epoxy floor coatings blistering and concrete substrate property. And on the base of those study consequence, we have developed new polymer cement mortar material to prevent epoxy floor coatings from blistering most perfectly. This material as underlayment was tested for adhesive strength to epoxy floor coatings, and performance of preventing epoxy floor coatings from blistering according to accelerating blistering test method. From the test results, their excellent performance is confirmed.
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