PENGARUH VARIASI SUHU PEMBAKARAN ABU CANGKANG SAWIT SEBAGAI BAHAN TAMBAH DAN SUPERPLASTICIZER TERHADAP KUAT KARAKTERISTIK TEKAN BETON
Palm oil shells are waste from oil palm mills, so far a portion of palm oil waste has been utilized but still leaves a considerable amount of residual meaning that palm oil processing waste in the form of palm shells has not been utilized optimally. The results of the study showed that the oil palm shell ash contained a considerable amount of silica, so that the oil palm shell ash could be utilized as an added ingredient and substitution for concrete compressive strength. This study aims to determine the effect of oil palm shell ash and get the optimal percentage of the addition of palm shell ash on concrete compressive strength, the method used in this study is the experimental method using cylindrical specimens measuring 7.5 x 15 cm by 45 fruit consisting of 9 normal concrete specimens, 9 palm shell ash specimens without combustion, 9 palm shell ash specimens which were burned again at 600'C, 9 palm shell ash test specimens burned again at 700'C and 9 palm shell ash test specimens burned again at 800'C. Each addition of palm shell ash by 5% in each variation of the test object, testing was carried out at the age of 7 days, 14 days and 28 days. Based on this research, the results of testing the compressive strength of concrete in each temperature variation of the specimen showed that at the age of 28 days Normal Concrete (BN) = 19.6 Mpa, Concrete Without Combustion (BS0) = 26.4 Mpa, Temperature Concrete 600'C = 11.4 Mpa, Concrete Temperature 700'C = 13.4 Mpa and Concrete Temperature 800'C = 18.2MPa.