Research on Localized Application of Pavement Materials for Rural Industrial Roads in Mountainous and Hilly Areas

• 1、Dizhou Town People’s Government, Jingxi, Guangxi 533800

Abstract：Rural industrial roads in the mountainous border region of Guangxi are challenged by fragmented terrain, limited farmland, concentrated rainstorms in the flood season, and seasonal heavy-load sugarcane transport. Conventional rigid pavement schemes often result in excessive cut-and-fill, high costs, and poor structural adaptability. In the reconstruction of a 1.863 km sugarcane base road in Dizhou Town, Jingxi City, a differentiated Class IV (Category II) highway standard was applied. Local limestone aggregate and C25 cement concrete served as the primary materials, and 0.8% naphthalene-based set-retarding water-reducing admixture was added to control concrete cracking under hot and humid conditions. The design prioritized maximum reuse of the existing road, adopted terrain-adapted alignmenResearch on Localized Application of Pavement Materials for Rural Industrial Roads in Mountainous and Hilly Areast, and integrated the cement concrete pavement with irrigation and drainage. Small-scale mechanized construction suitable for mountainous areas and a three-tier quality control system were employed. After project completion, the total investment decreased by 12%, the reuse rate of the existing road reached 92%, newly occupied farmland was reduced by 65%, and the cut-to-fill ratio achieved 100%. This solution balances engineering safety, cost control, ecological protection, and industrial transport requirements, and offers a reference for similar projects in southwestern China.

Keywords： Mountainous and hilly areas Use of local materials Set-retarding water-reducing admixture irrigation and drainage integration