This results in UHPC having high compressive strength, excellent crack resistance, and long-term durability. Moreover, SF significantly enhances UHPC's strength through pozzolanic reactions. Nevertheless, the present elevated expense of silica fume has significantly increased the material expenses for UHPC in comparison to conventional concrete. The research and development of alternative materials with similar properties but lower costs are becoming an important direction. Several studies have shown the potential of industrial waste materials, such as fly ash, blast furnace slag, and rice husk ash. Thesematerials are not only available in large quantities but can also reduce CO2 emissions, contributing to environmental protection. In order to promote the widespread application of UHPC, it is necessary to find an alternative material with similar properties to silica fume but at a lower cost. Therefore, utilizing local and waste materials in a suitable and standardized manner as a replacement for cement is regarded. The use of local and recycled materials not only helps reduce the production costs of UHPC but also lessens the negative environmental impact. The construction industry can create more sustainable concrete types that meet modern technical and environmental standards. Additionally, the development and application of alternative materials will promote a circular economy, minimizing waste and conserving natural resources. It aims to be an essential issue for the progress of the economy by resulting in concrete that is more eco-friendly to the environment [11; 12; 13; 14; 15]. Various waste materials have been initially investigated to understand their effects on the structural resistance of materials. For example, using rice husk ash (RHA) in soil improvement is one of the findings that discovered that the substance could be regarded as an excellent stabilizing agent for enhancing the various soils' geotechnical properties [16]. Furthermore, it can be partially utilized as a cement replacement. To obtain the highest possible compressive and split tensile strengths, the ideal ratio is 7.5% of cement replacement for RHA. This ratio produces the best results, and the cost is really reasonable. RHA and paper ash are two materials that might be substituted for the paste typically used to produce self-compacting concrete (SCC) [17; 18]. Regarding the interfacial transition zone (ITZ), the porosity or total content of Ca(OH)2 can be reduced by incorporating RHA or SF into concrete. In addition, compared to the control samples, the ITZ is also narrower [19; 20]. Furthermore, the utilization of RHA with 84% SiO2 content can result in a remarkable 50% improvement in the concrete's compressive strength [21]. Moreover, impermeability can be improved with more durability; on the other hand, resistance against chemical attacks and frost can also be advantageous. Eventually, using those cement replacement materials, besides improving the concrete properties, is expected to prevent environmental pollution or save costs significantly. Vietnam, a leading rice producer, is harnessing its agricultural abundance for sustainable construction practices. The primary objective is to employ rice husk ash, an aftereffect of the production of rice, for the purpose of producing concrete. This innovative approach not only minimizes agricultural waste but also enhances the qualities of concrete, including its strength and durability. Rice husk ash, when incorporated into the concrete mix, serves as an additive that enhances the properties of cement, resulting in the creation of construction materials that are both high-performing and eco-friendly. This initiative reflects Vietnam's dedication to resourcefulness and eco-conscious advancements in concrete technology, paving the way for greener and more resilient infrastructure. The integration of rice husk ash into concrete mixtures offers several key benefits.