Adhesion Study of Kaolin and White Clay as Source Materials on Non-Metallic Substrate in Geopolymer Coating

Abstract

Properties of geopolymer coating on nonmetallic substrates, especially glass fiber-reinforced epoxy (GRE) have been considered based on the effect of Si/Al ratio and surface treatment at a determined proportion of solid to liquid (S/L) and curing temperature.Kaolin and white clay have been used as geopolymer raw material in study of adhesive strength in geopolymer coating. Effect Si/Al ratio and surface treatment on adhesive strength has been tested from 0.40-0.60using Elcometer 106 Pull Off. The answer shows that Si/Al ratio and surface treatment were effecting the adhesive strength of geopolymer coating. The highest adhesive strength 6.0 MPa was found ina Si / Al ratio of 3.5 with surface treatment.