Fly Ash Utilization as Concrete Mixtures in U-shaped Precast Ferrocement Concrete Product

The government of Indonesia has presented an ambitious mitigation target of 97.2% of the overall national commitment in terms of emission reduction to the United Nations Framework Convention on Climate Change/UNFCCC (Updated NDC, 2021). Climate resilience is what Indonesia hopes to accomplish by 2030. About 40% of greenhouse gas emissions come from energy used in the construction industry. Materials used in building around the world, including steel, aluminum, and concrete, make up 23% (Forestinsigths.id, 2022) using wood products as formwork when building with concrete. Steel is now the focus of efforts to lessen deforestation in the construction industry instead of woodwork. Further research is required on the use of fly ash in the creation of concrete mixtures with optimal proportions. The utilization of material proportions for the design of concrete mixtures will be determined by this study. The compressive strength of cement mortar cubes formed from fly ash substitute and cement mortar was tested in a lab as part of this research methodology. The nearby Banyuwangi Regency area provides the components for the concrete mixture. Fly ash is utilized in proportions of 5%, 10%, and 15% by weight of cement. The mortar formed from fly ash and cement replacement mixtures exhibited compressive strength similar to normal, according to the findings of compressive tests. Fly ash variant's water absorption test result is 4.86% greater than the typical variation. When there is a great capacity of water flow, it is not very important. The initial fractures for the fly ash substitute variety, UDAX15FA, were 26.37 kN, 4.10% less than the typical specimen. The test results for both specimens were similar, indicating that the same load capacity could be achieved by replacing the cement content with a fraction of fly ash.