THE EFFECT OF CURING ON COMPRESSIVE STRENGTH OF GEOPOLYMER MORTAR MADE RICESTRAW ASH, FLY ASH AND LATERITE SOIL Parea Rusan Rangan1, Rita Irmawaty2, M. W. Tjaronge3A. Arwin Amiruddin4, Bambang Bakri4and M. Tumpu1
1Doctoral Course Student, Civil Engineering Department, Hasanuddin University, Indonesia
2Associate Professor, Civil Engineering Department, Hasanuddin University, Indonesia
3Professor, Civil Engineering Department, Hasanuddin University, Indonesia
4Assistant Professor, Civil Engineering Department Hasanuddin University, Indonesia
Abstract
This study aims to analyze the effect of curing on the compressive strength of geopolymer mortar made from straw ash, fly ash and laterite soil. This research is experimental in the laboratory. Geopolymer mortar was produced using straw ash, fly ash and laterite soil with a percentage ratio of 16.67: 41.67: 41.67. The alkaline activator used is sodium hydroxide (NaOH) with a concentration of 12 M. The compressive strength test of 5 x 10 cm cylinders is used to evaluate the geopolymer mortar mixture produced at the age of 3, 7 and 28 days with curing, namely air and water curing.The results showed that the compressive strength of the geopolymer mortar increased along with the increasing age of each curing. The compressive strength values produced in air curing 3, 7 and 28 days were respectively 1.64 N/mm2, 1.72 N/mm2and 3.22 N/mm2. While water curing, the resulting compressive strength values for each curing are 1.03 N/mm2, 1.63 N/mm2and 1.68 N/mm2. At the ages of 3, 7 and 28 days, there was an increase in the compressive strength values from water curing to air curing, which were 0.37%, 5.23% and 47.82%, respectively. It can be seen that the compressive strength of the geopolymer mortar made from straw ash, fly ash and laterite soil in air curing is greater than that of water curing.
Keywords: unhasftuh
Topic: Material Science and Health Community Services
