Expansion Joint Treatment
Poly sulphide silicone or polyurethane silicones are used depending upon specifications and user preference. Polysulphide is grey in color while silicone sealant is colorless or white in color. PU can be made available in few selective colors. Most important here is movement accommodation factor.
Size of expansion joint and distance of joint is design aspect and is in preview of consulting engineers. However, correct joint preparations at edges and bottom surface and application methodology here is of utmost importance. Epoxy mortar is used to repair worn out broken edges and expanded polystyrene /PUF / bituminous board are used as backing materials for such joints.