Oktaviani Syaputri, Ratnawulan, Delvi Septiana, Muhammad Salam
Infrastructure development in Indonesia continues to increase, this can be seen from the increasing number of buildings and housing. The house is an important building for humans, one of the important parts of the house is the walls made of bricks and covered with plaster. Its function, which can be used as plaster on walls, makes the authors use mortar as a sample in this study. The drawback is that the existing mortar is easy to grab because it absorbs water. Therefore, the author wants to make a waterproof mortar by providing a hydrophobic layer. This study aims to obtain the optimum value of the contact angle and compressive strength by varying the temperature as the independent variable used, namely 30°C, 60°C, 90°C, 120°C and 150°C. The results showed that the optimal contact angle was 120.7053° with a compressive strength of 258.19 kg/cm2. The temperature calcination relationship with the contact angle and compressive strength of mortar, is the higher the temperature. The temperature relationship with the contact angle and compressive strength of cement mortar is higher than the temperature. © Published under licence by IOP Publishing Ltd.
Department of Physics, Faculty of Mathematics and Natural Sciences, Universitas Negeri Padang, Jln. Prof Dr. Hamka, Padang, 25131, Indonesia; Department of Physics Engineering, Telkom University, Indonesia
