ANALISA PERFORMA BETON DENGAN KADAR AIR DAN SEMEN TEREDUKSI TERHADAP SERANGAN SULFAT

Concrete is a composite material consisting of a mixture of coarse aggregate, fine aggregate, and cement paste, which after the hardening process produces very high strength. The quality of concrete is influenced by various factors, such as the proportion of materials used, the quality of the materials, and the methods of processing, including mixing, compaction, and maintenance carried out. This study aims to explore the use of calcium hydroxide (Ca(OH)₂) as a filler and superplasticizer as an admixture in concrete mixtures.
This study also focuses on its impact on the strength of concrete and its ability to withstand sulfate attacks, especially magnesium sulfate (MgSO₄) attacks. The main objective of this study is to examine how the addition of calcium hydroxide as a filler affects the compressive strength of concrete, especially when the air and cement content in the concrete mixture is reduced. In addition, this study also aims to assess the performance of concrete that has been mixed with filler and superplasticizer in dealing with sulfate attacks. This study was carried out by testing the compressive strength of concrete at the age of 28 days, which was tested at the Civil Engineering Laboratory of the University of Muhammadiyah Malang.
To complete the analysis, the tested concrete was also immersed in a sulfate solution to observe physical changes in the concrete due to sulfate attack, such as cracking and peeling. The results obtained provide a clearer picture of the effectiveness of the concrete mixture in meeting the strength and resistance standards to aggressive environments. This study is expected to provide useful information for the development of more environmentally friendly and efficient concrete materials, as well as provide deeper insight into the performance of concrete in extreme environmental conditions, as well as the potential use of fillers and admixtures to improve the overall quality of concrete.