Pengaruh Abu Vulkanik Sebagai Substitusi Sebagian Semen Terhadap Kuat Tekan M…

ABSTRACT Mount Marapi is one of the active volcanoes in West Sumatra that erupted again and released volcanic ash and cold lava at the end of 2023. In general, the composition of volcanic ash consists of Silica and Quartz. The abundant volcanic ash has not been optimally utilized, while volcanic ash which has pozzolanic properties can be used as a partial substitute for cement in making concre…