MANOREK, I.; SONDAKH, F.; SENGKEY, S. L. Pengaruh Penggunaan Bahan Tambah Polyethylene Terephthalate (Pet) Dan Fly Ash Terhadap Kinerja Beton F’c 20 Mpa . KOLONI, [S. l.], v. 5, n. 3, p. 4749–4759, 2026. DOI: 10.31004/koloni.v5i3.1476. Disponível em: https://koloni.or.id/index.php/koloni/article/view/1476. Acesso em: 2 oct. 2026.