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<p>Rice husk ash was used as a partial substitute for cement in concrete to reduce its cost, and alternative processing methods using agricultural waste. Therefore, the experiment was performed on conventional reinforced concrete beams M60 strength (M1) along with the RHA kept at 10% constant (M2) and the steel fibers varied as 0.5, 1.0, and 1.5% (M3–M5) and the beams were studied in terms of impact force and deformation residual deflection and crack width. It was observed that the compressive strength of concrete was found to be within range of 60 to 67 MPa; however, the compressive strength on M1 was found to be higher than M2. The beam M5 failed at 27.6 mm displacement, whereas the M3 beam failed at 44 mm which shows that the performance of steel fiber increased beyond 0.5%, reducing the deformability under static loading. It was observed that the conventional RHA concrete beam reduces the impact resistance by 16% as compared to conventional concrete under impact loading. The peak impact resistance of M1, M2, M3, M4, and M5 mixes of chosen beams are 81, 68, 70, 74, and 76 kN, respectively and concluded that the steel fibers used below 1% are found to be efficient. The numerical investigation performed using ABAQUS/CAE and the predicted results were compared with experimental results. It was observed that the predicted results were found in good agreement with experimental results and maximum deviation found within 9 and 5% under static and impact loading, respectively. It is concluded that the dynamic increase factor on the beam with RHA was found to be reduced by 12% as compared to conventional beam; however, the influence of increase of fiber in the dynamic increase factor was found insignificant.</p>

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Approach towards net-zero carbon emission: rice husk ash cementitious material on the fibrous reinforced concrete beams under mechanical loading through the experiment and simulations

  • 期刊论文

  • 发表日期：

    2025年1月10日

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  • Manish Khanna,
  • K. Senthil

摘要

Rice husk ash was used as a partial substitute for cement in concrete to reduce its cost, and alternative processing methods using agricultural waste. Therefore, the experiment was performed on conventional reinforced concrete beams M60 strength (M1) along with the RHA kept at 10% constant (M2) and the steel fibers varied as 0.5, 1.0, and 1.5% (M3–M5) and the beams were studied in terms of impact force and deformation residual deflection and crack width. It was observed that the compressive strength of concrete was found to be within range of 60 to 67 MPa; however, the compressive strength on M1 was found to be higher than M2. The beam M5 failed at 27.6 mm displacement, whereas the M3 beam failed at 44 mm which shows that the performance of steel fiber increased beyond 0.5%, reducing the deformability under static loading. It was observed that the conventional RHA concrete beam reduces the impact resistance by 16% as compared to conventional concrete under impact loading. The peak impact resistance of M1, M2, M3, M4, and M5 mixes of chosen beams are 81, 68, 70, 74, and 76 kN, respectively and concluded that the steel fibers used below 1% are found to be efficient. The numerical investigation performed using ABAQUS/CAE and the predicted results were compared with experimental results. It was observed that the predicted results were found in good agreement with experimental results and maximum deviation found within 9 and 5% under static and impact loading, respectively. It is concluded that the dynamic increase factor on the beam with RHA was found to be reduced by 12% as compared to conventional beam; however, the influence of increase of fiber in the dynamic increase factor was found insignificant.