PENGARUH VARIASI SUHU PEMBAKARAN ABU CANGKANG SAWIT SEBAGAI BAHAN SUBTITUSI SEMEN TERHADAP WAKTU IKAT DAN KUAT TEKAN MORTAR
The study in this study is how the variation in combustion temperature affects the binding time and compressive strength of the mortar. Palm ash comes from the process of burning the shell into ash. This combustion process removes the organic chemical content and leaves silica oxide (SiO2) up to 54.53% and other compounds also found in cement (Padang Research and Standardization Center, 2015). The results of the study show that palm shell ash contains a fairly large silica element, so that the palm shell ash can be used as added ingredients or substitution. This study aims to determine the effect of palm kernel ash waste as cement substitution material on binding time and mortar compressive strength, the method used is the experimental method using 36 cube size 5 x 5 x 5 cm specimens consisting of 9 mortar specimens every variation. Based on this research, the results of the maximum mortar compressive strength at the age of 28 days, normal mortar (MN) = 16.4 Mpa, mortar without combustion (MS0) = 20.8 Mpa, mortar combustion temperature 600˚C (MS1) = 9.84 Mpa and mortar temperature 700˚C (MS2) = 12.8 Mpa. And for the results of testing the mortar binding time, the bonding capacity of the mortar is very slow in the mortar combustion temperature of 600˚C and 700˚C compared to the binding time of normal mortar (MN) and mortar without combustion (MS0).