Effect of Adding Industrial Wastes on the Mechanical Properties of Gypsum

In this research an attempt has been made to study the effect of adding P. V. C (by weight) on gypsum properties (compressive strength, modules of rapture). The research plan consists of using eight different percentage of waste material (P. V. C) (0, 1, 2, 3, 4, 5, 6 and 7) % (by weight as addition) and (water/gypsum) ratio equal to 32 %. The results of this study show that the local waste material PVC can be used with construction materials such as gypsum safely and the PVC enhancing the mechanical properties (compressive strength and modulus of rupture) when it used the optimum ratio 3 %.