International Journal For Multidisciplinary Research

E-ISSN: 2582-2160   •   Impact Factor: 9.24

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Comparison of Strength Parameters by Using Cinder as Substitute to Coarse Aggregate with Superplasticizers

Author(s) Ms. APEKSHA V, Prof. NAYANA B S
Country India
Abstract Concrete continues to be the most common material in civil engineering works, but the rising cost and environmental challenges linked to natural aggregates demand sustainable alternatives. This project examines the application of cinder aggregate, an industrial byproduct, applied as a partial replacement material for coarse aggregate in M30 grade concrete. Mixes were prepared with different cinder proportions (0% –75%) at a constant water–cement ratio of 0.45, while superplasticizers were added to maintain a target slump. Mechanical characterization was evaluated through compressive and split tensile strength tests at 7 – days and 28 - days. Microstructural studies using SEM, XRD, and EDX provided deeper insights into pore structure, hydration products, and bonding within the interfacial transition zone. Results indicated that increased cinder content required more superplasticizer, but the mix with 45% cinder and 55% natural aggregate offered the best balance of strength, workability, and durability. The microstructure confirmed a denser and more uniform matrix at this level, whereas higher replacement led to weaker bonding and higher porosity. These findings suggest that cinder aggregate can serve as a cost-effective, lightweight, and eco-friendly substitute in concrete, promoting sustainable construction practices.
Keywords Concrete, Cinder Aggregate, Superplasticizer, Workability or consistency, Compressive or load-bearing Strength, Splitting Tensile Strength, Microstructure, Sustainable Construction.
Field Engineering
Published In Volume 7, Issue 5, September-October 2025
Published On 2025-10-31
DOI https://doi.org/10.36948/ijfmr.2025.v07i05.59236
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E-ISSN 2582-2160
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