Evaluation on Partially Bonded System of Exterior Wall Finishing with Large Tile Using Low Modulus Organic Adhesive

Abstract

Recently, application of large tiles over 300 mm X 300 mm on wall has been increasing in the exterior finishing. However, still there exist no standard specifications regarding the adhesion of large tiles using organic adhesives. This purpose of this research is to focus on the construction procedures involving application of organic adhesives on partially bonding of large tiles. Effect of factors such as the thickness of adhesive layer on properties such as adhesive force, surface adhesion area percentage, withstanding load, withstanding wind pressure was studied. In addition, durability of the adhesion was also analyzed by fatigue endurance tests. As a result it was found that although adhesion surface area percentage is lower in case of partial adhesive application, once the adhered surface area crosses a certain value, tiles can withstand their own weight as well as wind pressure theoretically. Furthermore, silyl terminated polyether based adhesives were also found to display high fatigue endurance in the direction of repetetive shear strain, which we would like to report here.