AHMAD SANI; BELLO UMAR JADA; RAJIU MUSTAPHA MUHAMMAD. OPTIMIZATION OF COCONUT SHELL ASH AS A BITUMEN MODIFIER USING MARSHALL STABILITY PROPERTIES. Journal of Engineering Research and Development, Nigeria, v. 9, n. 5, 2025. DOI: 10.70382/bejerd.v9i5.014. Disponível em: https://berkeleypublications.com/bjerd/article/view/601.. Acesso em: 20 oct. 2025.