The Effect of a Combination of Palm Kernel Shell Ash and Styrene-Butadiene Rubber on the Compressive Strength of Concrete. Journal of Research and Inovation in Civil Engineering as Applied Science (RIGID), [S. l.], v. 5, n. 2, p. 103–110, 2026. DOI: 10.58466/seff1026. Disponível em: https://jurnal.politap.ac.id/index.php/rigid/article/view/2348. Acesso em: 26 aug. 2026.