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首页> 外文期刊>Materials & design >Effect of crumb rubber gradation on a rubberized cold recycled mixture for road pavements
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Effect of crumb rubber gradation on a rubberized cold recycled mixture for road pavements

机译：碎屑橡胶级配对公路路面橡胶处理冷再生混合物的影响

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摘要

Cold recycling technique represents the most environmental friendly solution for pavement rehabilitation nowadays. In fact, this technique allows the use of the highest percentage of reclaimed asphalt avoiding the energy consumption related to aggregates heating required by the traditional hot mix asphalt design. The mix design represents a key phase of the cold mix production. The study of workability and compactability properties combined with a deep laboratory investigation is required. The idea of introducing crumb rubber in the cold mixtures was developed based on the concept of maximizing the valorization of recycled materials together with the goal of achieving high performance. In the present research project, two different gradations of crumb rubber, processed with the traditional grading method, have been adopted for the production of a cold recycled mixture stabilized with bitumen emulsion and cement. The spring-back effects of the rubber particles, which occur after compaction, together with the Indirect Tensile Strength and the Indirect Tensile Stiffness Modulus have been studied. The results show that the gradation of the adopted crumb rubber sensibly affects the compaction and mechanical properties of the cold recycled mixture.
机译：冷再生技术是当今路面修复中最环保的解决方案。实际上，该技术允许使用最高百分比的再生沥青，从而避免了传统热拌沥青设计所需的与集料加热有关的能耗。混合料设计代表了冷混合料生产的关键阶段。需要对可加工性和可压实性进行研究，并进行深入的实验室研究。在最大限度地提高再生材料的增值价值以及实现高性能的目标的基础上，提出了将胶粉引入冷混合物中的想法。在本研究项目中，采用传统分级方法处理的两种不同等级的粒状生胶被用于生产由沥青乳液和水泥稳定的冷再生混合物。研究了橡胶颗粒在压缩后的回弹效应，以及间接拉伸强度和间接拉伸刚度模量。结果表明，所采用的碎屑橡胶的级分会明显影响冷再生混合物的压实度和机械性能。

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