Scholarlink

<p>The application of bio-bitumen in road construction offers a promising solution to the shortage of petroleum-based bitumen while enhancing environmental sustainability. However, an issue arises when bio-oil is added to the base binder, as it softens the bio-bitumen. To address this problem, rice husk ash is used in this study to improve further castor oil-modified bio-bitumen through the Central Composite Design (CCD). During the optimization process, castor oil content and rice husk ash content were defined as independent variables (factors). At the same time, the response values considered were penetration, softening point, specific gravity, Marshall stability, Marshall quotient, optimum bitumen content (OBC), Indirect tensile strength (ITS), Tensile strength ratio (TSR), and Cantabro loss. The Response Surface Methodology (RSM) model was utilized to determine the optimal content of castor oil (CO) and rice husk ash (RHA) in castor oil and rice husk ash modified bio-bitumen (CORMBB) and to analyze the behavior of the modified bio-bitumen. The feasibility of the RSM model was verified through experimental results. The findings indicated that incorporating CO and RHA improved the neat binder's durability, moisture resistance, thermal resistance, and abrasion resistance. The optimal CO and RHA contents, determined using the RSM model, were 8.992% and 6.00%, respectively. Additionally, Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) analyses were performed on both the base bitumen and modified bio-bitumen (at optimal dosage of CO and RHA) binder. The FTIR analysis of modified bio-bitumen reveals enhanced chemical interactions that improve flexibility, oxidative resistance, deformation resistance, and mechanical properties, making the bio-bitumen more durable and suitable for diverse applications. XRD analysis shows that RHA contributes amorphous silica and crystalline phases, enhancing the structural rigidity and durability of the modified bio-bitumen, with castor oil improving the dispersion and compatibility of RHA particles in the binder. Combining the proposed weight function with the RSM model can achieve bio-bitumen with targeted performance requirements. This study provides a solid foundation for the more efficient utilization of bio-bitumen in road construction.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Evaluation of Optimum Dosage of Castor Oil and Rice Husk Ash in Modified Bio-Bitumen Using Response Surface Methodology Based on Bituminous Mix Performance

  • 期刊论文

  • 发表日期：

    2025年9月17日

查看全文
  • Sanjeev Kumar,
  • Sanjeev Kumar Suman

摘要

The application of bio-bitumen in road construction offers a promising solution to the shortage of petroleum-based bitumen while enhancing environmental sustainability. However, an issue arises when bio-oil is added to the base binder, as it softens the bio-bitumen. To address this problem, rice husk ash is used in this study to improve further castor oil-modified bio-bitumen through the Central Composite Design (CCD). During the optimization process, castor oil content and rice husk ash content were defined as independent variables (factors). At the same time, the response values considered were penetration, softening point, specific gravity, Marshall stability, Marshall quotient, optimum bitumen content (OBC), Indirect tensile strength (ITS), Tensile strength ratio (TSR), and Cantabro loss. The Response Surface Methodology (RSM) model was utilized to determine the optimal content of castor oil (CO) and rice husk ash (RHA) in castor oil and rice husk ash modified bio-bitumen (CORMBB) and to analyze the behavior of the modified bio-bitumen. The feasibility of the RSM model was verified through experimental results. The findings indicated that incorporating CO and RHA improved the neat binder's durability, moisture resistance, thermal resistance, and abrasion resistance. The optimal CO and RHA contents, determined using the RSM model, were 8.992% and 6.00%, respectively. Additionally, Fourier Transform Infrared Spectroscopy (FTIR) and X-ray diffraction (XRD) analyses were performed on both the base bitumen and modified bio-bitumen (at optimal dosage of CO and RHA) binder. The FTIR analysis of modified bio-bitumen reveals enhanced chemical interactions that improve flexibility, oxidative resistance, deformation resistance, and mechanical properties, making the bio-bitumen more durable and suitable for diverse applications. XRD analysis shows that RHA contributes amorphous silica and crystalline phases, enhancing the structural rigidity and durability of the modified bio-bitumen, with castor oil improving the dispersion and compatibility of RHA particles in the binder. Combining the proposed weight function with the RSM model can achieve bio-bitumen with targeted performance requirements. This study provides a solid foundation for the more efficient utilization of bio-bitumen in road construction.