Mechanical and Durability Performance of Concrete using Dolomite Powder and Pond Ash as Cement Replacements
J. Environ. Nanotechnol., Volume 13, No 4 (2024) pp. 149-154
Abstract
The construction sector, reliance on substantial quantities of raw materials has historically imposed a significant environmental burden due to its reliance on cement in concrete production. Cement manufacturing, being energy-intensive, has been a major contributor to CO2 emission, emphasizing the urgent need for sustainable alternatives. This study explored the substitution of cement with industrial by-products such as pond ash (PA) and dolomite powder (DP) to address these challenges. PA was incorporated at an optimal level of 10% by cement mass, while DP was added in varying combination of 5%, 10%, 15%, 20%, 25%, and 30%. Eight mix proportions were formulated for M20-grade concrete, designed with a w/b ratio of 0.5 in adherence to IS:10262-2019. The experimental program assessed the mechanical properties of the mixes, including compressive strength, split tensile strength, and flexural strength, alongside durability characteristics such as Rapid Chloride Permeability Test (RCPT), weathering resistance, and permeability tests. Results demonstrated that the combination of 10% PA and 15% DP (M4 mix) exhibited the most favorable performance at 7, 28, and 90 days, with significant improvements in strength compared to the control mix. The M4 mix displayed enhanced resistance to chloride penetration, superior weathering resilience, and reduced permeability, affirming its effectiveness as a sustainable concrete solution at 7, 28, and 90 days. Overall, the integration of PA and DP in concrete improved strength and reduce the environmental impact of construction materials, offering a promising pathway for eco-friendly and cost-effective building practices.
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Reference
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