Analysis of Brick Compressive Strength and Water Absorption Based on Various Furnace Duration

Abstract

Abstract. This research aims to describe: (1) compressive strength of M-5a module brick 7 days, 9 days, and 11 days furnace time, (2) water absorption M-5a module brick 7 days, 9 days, and 11 days, and (3) compressive strength difference of M-5a module brick 7 days, 9 days, and 11 days. The methods are: (1) making raw brick which is composed by a portion of rice husk and 3 portions of clay to 120 bricks, (2) dehydrating on sunlight for 7 days, then going furnace for 7 days, 9 days, and 11 daysusingrice husk, (3) examining to obtain data ofcompressive strength andwater absorption each 20 bricksofbrick 7 days, 9 days, and 11 days furnace time, and (4) analyzing descriptive statisticandone-way variant analysis. The result obtain that: (1) average ofcompressive strength of M-5a module brick 7 days furnaceis35,80 kg/cm2, 9 days furnaceis 37,30 kg/cm2, 11 days furnaceis 39,30 kg/cm2. Examined compressive strength of brick is not suitable to SNI No: 15-2094-2000,  (2) average of water absorption of M-5a module brick 7 days furnaceis22,96 %, 9 days furnaceis21,50 %, and11 days furnaceis19,25 %.Maximum water absorption of brick is suitable to SNI No: 15-2094-2000 on 11 days furnace, and (3) No significant difference on brick compressive strength average amongs module of M-5a on 7 days, 9 days, and 11 days furnace time.

Keywords: Compressive strength, water absorption, furnace.