Analisa Kuat Tekan Beton Dengan Penambahan Superplasticizer Concrete Admixture Pada Mutu Beton Standar fc’ 19,3 Mpa

Abstract

Concrete, a composite material consisting of coarse aggregates, fine aggregates, water, and portland cement, is extensively utilized in constructing a wide range of structures, such as foundations, columns, beams, floor slabs, culverts, weirs, and dams. Its components typically include cement, fine aggregates, coarse aggregates, and water, although additional substances may be incorporated to enhance its overall quality and properties. A well-designed mix is essential to achieve the desired concrete quality, especially under specific conditions. The final properties of concrete are strongly influenced by the composition and quality of its ingredients, with cement serving as the binding agent that holds the aggregates together. Several factors affect concrete strength, including the type and phase of the cement, aggregate gradation, mixing techniques, compaction, curing processes, the concrete's age, and the inclusion of chemical admixtures. Concrete's widespread use in construction is due to its numerous benefits, such as ease of handling, versatility in shaping, high compressive strength, resistance to wear and water penetration, cost-effectiveness from locally available materials, and low maintenance needs. Its adaptability makes it suitable for both large-scale and smaller construction projects. This study investigates the compressive strength of concrete modified with different amounts of Superplasticizer Concrete Admixture (SPCA), aiming for a target strength of 19.3 MPa. Following the SNI 63-2834-2000 guidelines for standard concrete mixture preparation, the research reveals that the compressive strength of the standard concrete after 28 days was measured at 19.69 MPa, exceeding the target strength of 19.3 MPa. The highest compressive strength of 20.38 MPa was observed in the mix containing 1.25% SPCA (SPCA-1), and the average density of the concrete after 28 days classified it as regular concrete.