Scholarlink

<p>Sediment accumulation in dams reduces reservoir storage capacity and shortens the lifespan of hydraulic infrastructure. Reusing treated sediment (TS) as a partial cement replacement in roller-compacted concrete (RCC) provides a sustainable strategy for sediment valorization and lower clinker consumption. This study evaluated the feasibility of incorporating TS from the Kerrada Dam in western Algeria into RCC for rigid pavement applications through experimental testing and numerical modeling. Four mixtures were prepared with cement replacement levels of 0%, 10%, 20%, and 30% by mass. Water content was optimized using the maximum-density method. The experimental program included measurements of density, compressive strength, splitting tensile strength, ultrasonic pulse velocity up to 360 days, capillary water absorption, acid resistance, and microstructural analysis using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM/EDX). A three-dimensional finite element model was also developed to assess pavement-scale behavior under 3-S3 truck loading. The incorporation of TS reduced early-age strength but improved long-term performance at moderate replacement levels. RCC10 exhibited the most balanced performance, with compressive strength reaching 64.5&#xa0;MPa at 360 days, compared with 60.5&#xa0;MPa for the reference mixture, corresponding to a 6.6% increase. TS also improved durability in terms of water transport and acid resistance. Microstructural observations indicated a transition from crystallization-driven deterioration in the reference mixture to dissolution-driven degradation in TS-containing mixtures. Numerical modeling showed that RCC30 exhibited favorable durability; however, RCC10 delivered the most balanced pavement response, including a 32.2% reduction in rutting along path L2 at 28 days and the highest pre-exposure safety factor of 1.55 at 90 days. Overall, RCC10 was identified as the most suitable mixture for rigid pavement applications.</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

Mechanical and Durability Performance of Roller-Compacted Concrete Pavements Modified with Treated Sediments: Experimental and Finite Element Analysis

  • 期刊论文

  • 发表日期：

    2026年7月1日

查看全文
  • Ahmed Ameur Messafah,
  • Omar Safer,
  • Mouloud Dahmane,
  • Imene Laoufi,
  • Adem Ait Mohamed Amer,
  • Ouaddah Chaib ,
  • Mohamed Salhi,
  • Miloud Hamadache ,
  • Nadia Belas

摘要

Sediment accumulation in dams reduces reservoir storage capacity and shortens the lifespan of hydraulic infrastructure. Reusing treated sediment (TS) as a partial cement replacement in roller-compacted concrete (RCC) provides a sustainable strategy for sediment valorization and lower clinker consumption. This study evaluated the feasibility of incorporating TS from the Kerrada Dam in western Algeria into RCC for rigid pavement applications through experimental testing and numerical modeling. Four mixtures were prepared with cement replacement levels of 0%, 10%, 20%, and 30% by mass. Water content was optimized using the maximum-density method. The experimental program included measurements of density, compressive strength, splitting tensile strength, ultrasonic pulse velocity up to 360 days, capillary water absorption, acid resistance, and microstructural analysis using scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM/EDX). A three-dimensional finite element model was also developed to assess pavement-scale behavior under 3-S3 truck loading. The incorporation of TS reduced early-age strength but improved long-term performance at moderate replacement levels. RCC10 exhibited the most balanced performance, with compressive strength reaching 64.5 MPa at 360 days, compared with 60.5 MPa for the reference mixture, corresponding to a 6.6% increase. TS also improved durability in terms of water transport and acid resistance. Microstructural observations indicated a transition from crystallization-driven deterioration in the reference mixture to dissolution-driven degradation in TS-containing mixtures. Numerical modeling showed that RCC30 exhibited favorable durability; however, RCC10 delivered the most balanced pavement response, including a 32.2% reduction in rutting along path L2 at 28 days and the highest pre-exposure safety factor of 1.55 at 90 days. Overall, RCC10 was identified as the most suitable mixture for rigid pavement applications.