STUDI EKSPERIMEN PENGARUH SUBSTITUSI ABU VULKANIK GUNUNG LEWOTOBI TERHADAP KARAKTERISTIK BETON NORMAL. Science and Applied Journal (SIAP), [S. l.], v. 2, n. 1, p. 148–160, 2025. Disponível em: https://journal.ppipbr.com/index.php/siap/article/view/836.. Acesso em: 6 sep. 2026.