article · Journal of Materials Research and Technology
Agricultural regions often face challenges with managing the volume of agricultural waste ash. Utilizing these combustion residues as pozzolanic materials offers an approach to partially replace cement in ultra-high-strength concrete. Experimental testing examined sugarcane bagasse ash at replacement levels of 10, 20, and 30 per cent of cement mass, alongside corn stalk ash at levels of 2, 4, 6, and 8 per cent. Assessments covered workability, compressive strength, splitting tensile strength, flexural strength, modulus of elasticity, chloride ion penetration resistance, water sorptivity, and permeability. Combining 20 per cent sugarcane bagasse ash with 4 per cent corn stalk ash enabled concrete to reach compressive strengths exceeding 205 megapascals and flexural strengths above 27 megapascals at 28 days. Additionally, a combined replacement of 38 per cent achieved the lowest overall chloride and water permeability.
Traditional cement production is resource-intensive and generates considerable environmental pressure, while agricultural crop residues frequently present disposal difficulties. Demonstrating that sugarcane and corn processing wastes can replace nearly a quarter of cement while maintaining ultra-high structural strength offers a practical path toward reducing the environmental impact of construction materials and finding high-value utility for agricultural by-products.
This work points toward opportunities for concrete producers and infrastructure developers seeking to formulate high-performance building materials containing lower proportions of virgin cement. Potential applications include specialised, highly durable concrete structures exposed to water or chlorides. Based on the abstract, the research is at an applied laboratory stage, meaning pilot batching, supply chain validation, and regulatory compliance testing would be needed before real-world commercial deployment.
AI-generated from the published abstract. Always read the original work before citing.
Agricultural countries suffer from growth problems of agricultural waste ash (AWA). This research paper studies the use of AWA as a partial substitute for cement to produce ultra-high-strength concrete (UHSC). This paper also investigates the effect of using sugarcane bagasse ash (SBA) and corn stalk ash (CSA) on the properties of UHSC. Residues from the combustion process of agricultural wastes are utilized as a pozzolanic material inserted as a partial substitute for cement for UHSC production. The replacement rates of cement by the SBA were 10%, 20%, and 30% of the mass, whilst those of cement by the CSA were 2%, 4%, 6%, and 8% of the mass. The effects of SBA and CSA on workability, compressive strength, splitting tensile strength, flexural strength, and modulus of elasticity on UHSC properties were investigated. In addition, the effects of SBA and CSA on resistance to chloride ion penetration and water sorptivity and permeability in UHSC were investigated. The investigations showed impressive results. That is, producing UHSC with respective compressive and flexural strengths of more than 205 and 27 MPa is possible when 24% of cement mass replacement by AWA (SBA 20% + CSA 4%) is conducted at the test age of 28 days. The lowest permeability is achieved with 38% of cement mass replacement by AWA (SBA 30% + CSA 8%) of 140 coulombs and 0.95 (cm/sec) for chloride and water permeability, respectively.
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DOI: 10.1016/j.jmrt.2023.01.197
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