EFFECT OF COPPER SLAG UTILIZATION ON THE DURABILITY OF CONCRETE BASED ON COMPRESSIVE STRENGTH AND POROSITY UNDER SIMULATED SEAWATER EXPOSURE
Indonesia
DOI:
https://doi.org/10.26740/rekats.v14n01.p103-113Keywords:
Copper Slag, Compressive Strength, porosity, Seawater Simulation, Salt-Resistant ConcreteAbstract
The growing demand for durable concrete in aggressive marine environments encourages innovation in the use of eco-friendly materials such as copper slag. In line with that, this study aims to analyze the effects of normal conditions and seawater simulation immersion with 3.5% salinity on the compressive strength, porosity, and durability of concrete using copper slag in variations of 0%, 10%, 20%, and 30%. Copper slag was added to concrete with a target strength of f’c 30 MPa, followed by testing after 28, 42, and 56 days of immersion in simulated seawater with 3.5% salinity. The concrete was tested in dry conditions for compressive strength and porosity. The results show that adding copper slag up to 20% can significantly improve compressive strength and reduce porosity. However, in the 30% mixture, performance decreased due to an excessive amount of copper slag leading to weaker interparticle bonding and increased pore content due to material segregation. Copper slag also demonstrated better durability in seawater environments compared to concrete without substitution. This study indicates that copper slag has strong potential as an environmentally friendly alternative material to improve the durability of concrete in coastal areas.
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