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The research aims to study water permeable resistance and crystallization of concrete mixed with cement-based waterproofing material. In this study, it demonstrates that the samples merged with waterproofing material result in better water permeable resistance capability under pressure condition than the regular concrete as the control sample. The average numbers of water permeability of the samples and the control one were 3.16 and 7.50 centimeters respectively whereas the thickness of crystalline layers occurring around the samples were 2.50 to 3 centimeters. When crystalline areas were cut, new crystalline areas were rebuilt under relevant water situation. Based on mineral analysis using EDS technique, the results demonstrated that Titanium compound, a transitional metal compound in polymer synthesis reaction, was detected at crystalline area of concrete combinedwith cement-based waterproofing material. This confirmed that concrete blended with waterproofing material generating crystals within concrete. In agreement with chemical compound of cement-based waterproofing material crystallization type, Titanium dioxide compound was internally mixed.
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