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<p>This investigation examines the engineering behavior of cold mix asphalt (CMA) reinforced with randomly dispersed, cellulose fibers. CMA is a common type of bituminous mixture that is manufactured at ambient air temperature. Different quantities of cellulose fibers (1, 2, 3, 4, and 5) % by total weight of bitumen emulsion content were incorporated into CMA. Plain CMA without fibers and hot mix asphalt (HMA) were included as reference mixes. The results indicated that the overall mechanical characterizations of CMA were improved as a result of incorporating fibers, improvements achieved when 3% percentage of fibers was used. Specifically, stiffness modulus was significantly enhanced as were low temperature cracking and high temperature rutting resistance. Adding 3% cellulose fibers to CMA, increased service life approximately twice as much as expected in terms of water damage relative to the control CMA. Furthermore, scanning electron microscope (SEM) analysis of the fiber morphology indicated that the microstructural characteristics and surface texture of the cellulose fibers contribute to the improved distress resistance observed in the reinforced mixtures.</p>

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Eco-friendly cold mix asphalt incorporating cellulose fibers for short- and long-term performance

  • 期刊论文

  • 发表日期：

    2026年5月20日

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  • Hayder Kamil Shanbara

摘要

This investigation examines the engineering behavior of cold mix asphalt (CMA) reinforced with randomly dispersed, cellulose fibers. CMA is a common type of bituminous mixture that is manufactured at ambient air temperature. Different quantities of cellulose fibers (1, 2, 3, 4, and 5) % by total weight of bitumen emulsion content were incorporated into CMA. Plain CMA without fibers and hot mix asphalt (HMA) were included as reference mixes. The results indicated that the overall mechanical characterizations of CMA were improved as a result of incorporating fibers, improvements achieved when 3% percentage of fibers was used. Specifically, stiffness modulus was significantly enhanced as were low temperature cracking and high temperature rutting resistance. Adding 3% cellulose fibers to CMA, increased service life approximately twice as much as expected in terms of water damage relative to the control CMA. Furthermore, scanning electron microscope (SEM) analysis of the fiber morphology indicated that the microstructural characteristics and surface texture of the cellulose fibers contribute to the improved distress resistance observed in the reinforced mixtures.