PENGARUH PEMANFAATAN ABU KULIT KOPI SEBAGAI BAHAN TAMBAH TERHADAP SIFAT MEKA…

Concrete is a mixture of Portland cement or other hydraulic cement,fine aggregate, coarse aggregate and water, with or without additives that form a solid mass. Based on SNI 03-2847-2002, lightweight concrete is concrete containing light aggregate and has a unit weight of no more than 900 kg/m³. Coffee husk ash is produced from burning in a closed furnace at 600˚ for 3 hours. This researc…