Wahyuni, Abdullah, Sri Mulyati, Yulia Hayati
This study examines the performance of concrete made with sea sand sea water using two types of cement: ordinary portland cement (OPC) and portland pozzolan cement (PPC), with the incorporation of zeolite powder. Variations in zeolite content (0%, 7.5%, and 10%) were tested to evaluate compressive strength at 14, 28, and 56 days, as well as durability after immersion in a 5% Na₂SO₄ solution for 30, 60, and 90 days. The results indicate that OPC-based concrete generally achieves higher compressive strength compared to PPC. The addition of 7.5% zeolite to OPC yielded optimal compressive strength at 56 days, while PPC with 10% zeolite demonstrated significant improvements, despite lower overall strength. Durability testing revealed that PPC concrete exhibited superior resistance to aggressive environments, particularly sulfate attack. The addition of 10% zeolite significantly enhanced durability up to 90 days of immersion. For OPC concrete, 7.5% zeolite effectively reduced porosity and improved durability, although a slight decline was observed at 90 days. These findings highlight that while OPC provides better compressive strength, PPC with zeolite offers superior durability under harsh environmental conditions, making it a recommended choice for concrete construction in coastal regions. © (2025), (Polskie Towarzystwo Inzynierii Ekologicznej (PTIE)). All rights reserved.
Doctoral Program in Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Civil Engineering, Faculty of Engineering, University of Muhammadiyah Aceh, Banda Aceh, Indonesia; Department of Civil Engineering, Faculty of Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia; Department of Chemical Engineering, Faculty of Engineering, Universitas Syiah Kuala, Banda Aceh, Indonesia
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