Sustainable Material Integration in Roller-Compacted Concrete Pavements: A Comprehensive Review of Mechanical Properties, Durability, and Environmental Benefits

The escalating global demand for sustainable infrastructure has established Roller-Compacted Concrete (RCC) as a premier alternative to conventional paving methods, offering a strategic balance between rapid construction, cost-efficiency, and high structural capacity. This study provides a comprehensive assessment of integrating alternative aggregates—specifically Recycled Concrete Aggregate (RCA), Reclaimed Asphalt Pavement (RAP), Electric Arc Furnace Steel Slag (EAFSS), and crumb rubber—in conjunction with supplementary cementitious materials (SCMs) such as fly ash, silica fume, and slag. The analysis reveals that while high-absorption materials like RCA and EAFSS elevate the optimum moisture content, hydrophobic components like RAP generally curtail water demand, facilitating easier densification. Mechanically, the inclusion of recycled materials typically induces a controlled reduction in compressive and flexural strengths; however, the judicious addition of silica fume or GGBFS can effectively counteract these deficits by refining the interfacial transition zone (ITZ) and densifying the internal pore structure. Ultimately, the findings demonstrate that replacing up to ۵۰% of natural aggregates with recycled variants, when paired with optimized SCM dosages, yields a technically robust and environmentally responsible pavement solution. This research underscores the viability of these alternative materials as a pathway toward resource-efficient infrastructure, capable of meeting rigorous performance standards while substantially lowering the carbon footprint of modern pavement construction.

کلیدواژه ها:

Roller compacted concrete ، Alternative materials ، Recycled Asphalt ، sustainable development ، Environment