Ismail I, Ocholi A, Bashir JO. Effect of Coconut Shell Aggregate on Shrinkage Cracking in Concrete using Modified Ring Test. Direct Res. J. Eng. Inform. Tech. 2025;13(3):70-78. Accessed May 24, 2026. https://journals.directresearchpublisher.org/index.php/drjeit/article/view/519