Concrete durability with fly ash blended cement for coastal construction

Cement, as a concrete-forming material, is a contributor to CO2 emissions in the world. Reducing cement and replacing it with fly ash material can make green concrete without lowering the quality of the planned concrete. Concrete in marine environments is often damaged by aggressive environmental factors. The study aims to analyze the effect of fly ash substitution in cement on substantial performance. The test object is made and treated with seawater. Furthermore, the test specimens were tested in the laboratory to obtain performance and durability variables based on the mechanical properties of the concrete, namely compressive strength, flexural strength, and permeability of weight loss due to abrasion. Analysis of the compressive strength, flexural strength, permeability, and abrasion coefficient tests showed that concrete with seawater treatment has good durability for all variations.