THE EFFECT OF PINE TREE RESIN ON THE THERMAL AND MECHANICAL PROPERTIES OF PLASTER WITH EXPANDED CLAY

Abstract

This study focused on a new type of insulation plaster consisting of pine tree resin, expanded clay (EC), and gypsum. Gypsum plaster mortars were prepared with ECs with grain diameters of 0-2 mm and 2-4 mm and gypsum binder at 20%, 40%, 60%, and 80% by volume. The resin was added to each mortar at 0.5%, 1%, and 2% of the mix weight to create artificial pores. Samples with 32 different combinations were obtained. The samples were subjected to tests (such as thermal conductivity, compressive strength, ultrasonic sound velocity, and water absorption). The results showed that the higher the pine tree resin volume, the lower the density and thermal conductivity and the higher the compressive strength and porosity. The samples had high water absorption rates. The results indicate that these plasters can be used as interior plasters for insulation purposes and can be painted with any kind of paint.