Manorek I, Sondakh F, Sengkey SL. Pengaruh Penggunaan Bahan Tambah Polyethylene Terephthalate (Pet) Dan Fly Ash Terhadap Kinerja Beton F’c 20 Mpa . KOLONI [Internet]. 2026 Sep. 30 [cited 2026 Oct. 2];5(3):4749-5. Available from: https://koloni.or.id/index.php/koloni/article/view/1476