Pengaruh Penambahan Silika Amorf dari Sekam Padi terhadap Sifa Mekanis dan Sifat Fisis Mortar

Abstract

Luced up paddy is the waste of rice drill. Luced up paddy consist on much amorf of silica if it's heated until 500-700" C of temperature in 1 to 2 hours. In this research, have used silica amorf as an additive thing in mortar mixture. The test material are made with composition to make on 1 cement: 2,75 sand: 0,5 water to make normal mortar. By adding amorf of silica directed by luced up paddy with variation mixture is 3 %, 6%, 9 %, 12 % and 15 % from the mount of cement to make normal mortar. The result of the researching to indicate the used of Silica amorf directed by incediarism luced up paddy with proportion 9 % will increase compressive strenght mortar up to 31,08% and will increase pull strenght up to 42,55% from normal mortar. While percentace of mortar will also smalles water absorbtion and porisity up to 2,504 % and 4,000% from normal mortar.