Syammaun T, Isya M, Mahmud A, Husaini. Characterization of Air Voids and Permeability in Porous Asphalt Mixtures with Eggshell Ash as an Eco-Friendly Additive. IJIE [Internet]. 2024 Aug. 12 [cited 2026 Aug. 7];16(4):56-63. Available from: https://journal.uthm.edu.my/index.php/ijie/article/view/16253