ANALYSIS OF THE COMPRESSIVE STRENGTH OF NORMAL CONCRETE WITH COCONUT COIR FIBER AS ADDITIONAL MATERIAL AT HIGH TEMPERATURE. j.of Sustainable civ. Engineering (JOSCE) [Internet]. 2023 Oct. 18 [cited 2025 Aug. 29];5(02):144-58. Available from: https://ejournal.lppm-unbaja.ac.id/index.php/josce/article/view/2822