STUDI EKSPERIMENTAL PENGARUH PENAMBAHAN POLYESTER DENGAN KADAR 1%-12% TERHADAP KUAT TEKAN BETON. jkar [Internet]. 2020 Jul. 23 [cited 2026 Jun. 2];6(1):17-21. Available from: https://jurnal.poltekstpaul.ac.id/index.php/jkar/article/view/202