High Durability Coatings for FRP Structural Members in Construction

摘要

In order to choose the best paint system that is suitable to FRP for construction application, the authors conduct adhesion test, weathering test and abrasion resistance test for various kinds of paints that are expected to have good performances in these tests. To have high weatherproof performance compatibly with high abrasion resistance, paint systems that have high abrasion resistance intermediate coats and high weatherproof top coats are tested. High weatherproof top coats don't show enough performance in abrasion resistance. Vinylester resin top coat with glass flake shows good performance in abrasion resistance, hut shows worse weatherproof performance. From these results, the authors propose paint systems with high abrasion resistant intermediate coat and high weatherproof top coat as a standard paint system for FRP, and to repaint the top coat if it is damaged by sand blast. Some paint systems show a problem in adhesion between paint films and FRP. The paint system which top coat is vinylester resin with glass flakes shows worse weatherproof performance. Four paint systems don't show problems through all the tests. The authors propose these paints as the effective paints for FRP in construction application. High weatherproof type gel coat shows enough weatherproof performance comparing with paints.