The Effect of Calcium Carbonate (CaCO₃) and Polystyrene (PS) Composition on Contact Angle and Compressive Strength of Hydrophobic Cement Mortar

Abstract In the building there are several elements such as pillars, floors and walls. The wall is outermost part of that directly receives changes in weather rain. As a result, walls easily fragile make damaged. To reduce damage, it necessary to test cement resistant water (hydrophobic) so not damaged by durable with help hydrophobic agent additives form CaCO 3 polystyrene. purpose this study was investigate effect variations composition /polystyrene on contact angle layer compressive strength portland cement. Precursors were made varying 1%, 2%, 3% polystyrene/tetrahydrofuran 1:0,065; 2:0,065; 3;0,065 calcination temperature used 60°C using an oven. optimum measurement results obtained at variation Polystyrene 3:0.065, which 114.986° highest value 1% 3:0,065, 238.10 kg/cm 2 .