Paper Asia | 2026
Authors: Badua D.A.O.; Espiritu R.M.; Gaudia N.A.; Manzano R.C.A.; Santiago K.J.B.
DOI: 10.59953/paperasia.v42i1b.173
Journal: Paper Asia
Year: 2026
Publisher: IPMEDIA SDN BHD
Document Type: Article
Open Access: All Open Access; Gold Open Access
Cited by: 0
The production and use of cement are significant sources of greenhouse gas emissions. This project aims to utilize aquacultural wastes to reduce cement usage while enhancing the quality of the concrete. We assess the characteristics of concrete when pulverized oyster shell (POS) is used as a partial substitute. The main objective was to compare the physical characteristics of concrete containing 5%, 10%, and 15% pulverized oyster shells as a cement replacement. This analysis focused on evaluating the workability and permeability of the mixtures. Additionally, the study aimed to determine the compressive strength of the different types of concrete before and after coastal exposure. Lastly, a cost analysis was performed to identify the most effective treatment for the concrete mixtures. The results indicated that the workability of the mix is inversely correlated with the proportion of powdered oyster shell substitution. However, the partial replacement of 5% and 10% of cement with POS has a higher compressive strength than pure concrete. Ultimately, substituting 5% and 10% of the concrete mixture results in reduced production expenses while maintaining the same level of strength as pure concrete. © 2026, IPMEDIA SDN BHD. All rights reserved.
Coastal condition; Compressive strength; Concrete; Concrete cylinders; Oyster shell