KARAKTERISTIK MORTAR PADA LIMBAH ABU KELAPA SAWIT

Abstract

The effect of oil palm ash on strong press and water rates in the mortar has been investigated. The characteristics of oil palm ash mortar materials were analyzed physically and mechanically. The oil palm ash on the mortar consists of some variations of compositions, 0%, 7%, 14%, 21%, 28% and 35% from weight of cement, with a cubeshape test object size of 5 × 5 × 5 cm, done at test object for 28 days, the tool used in the compressive strength mortar testing is Material Equipment Testing (MET). Based on the results obtained, the highest hardness values is 3,15 × 107 N/m2 with palm ash variation 0% and 2,33 × 107 N/m2 the lowest hardness value with 35% ash variations. The highest water rate in normal mortar (0% oil palm ash) is 5,72% and at variation of compositions 7% to 35%, the water rates are 6,36% - 12,62%. The result of mortar hardness measured decreased while the water rate increased with the addition of palm ash.