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In order to assess sustainability of products and processes, different methodologies have been developed and used in the last years. In the road pavement construction area, most methodologies used for Life Cycle Assessment (LCA) are essentially focused in the construction phase. The present paper analyses the importance of the use phase of a road in the LCA of different paving alternatives, namely by evaluating energy consumption and gaseous emissions throughout the road pavement’s life. Therefore, a new LCA methodology for road pavements was developed, and the results of its application to a case study involving the construction of alternative pavement structures are discussed. The study intends to assess the influence of using more sustainable paving construction alternatives (asphalt recycling vs. conventional asphalt mixtures), and/or different surface course materials (which have a higher influence on the rolling resistance and, therefore, affect the performance during the use phase). The LCA results obtained for this case study showed that the reductions in energy consumption and gaseous emissions obtained during the use phase, for pavement alternatives with a lower rolling resistance surface course, are higher than the total amount of energy consumption and gas emissions produced during construction. It is therefore clear that some improvements in the characteristics of the surface course may have an effect over the road use phase that will rapidly balance the initial costs and gas emissions of those interventions. The LCA results obtained also showed that the sustainability of pavement construction may also be improved using recycled asphalt mixtures. 相似文献
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对旧沥青砼路面合理再生利用,既节约石料、石油沥青等紧缺资源和节能,降低成本,又可节省占地空间,具有环保意义,近年受到国内外广泛推崇.结合笔者在日本的研究成果,就沥青砼路面的不同再生利用技术中所涉及到的再生工艺、再生混合料配合比设计、再生混合料性能、施工设备配套和质量控制等技术问题作简要介绍. 相似文献
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公路改扩建为城市道路必须保证新旧路基路面衔接紧密,使两者联结成一个整体,具有良好的整体稳定性。解决好新旧路基、路面的衔接问题,是旧路改扩建的关键问题。 相似文献
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柔性路面路基土的永久变形 总被引:29,自引:0,他引:29
提出了一种柔性路面路基土在车辆重复轴载作用下的永久变形的计算方法,采用现行路基路面设计理论中将应力分析和应变分析分别处理的通行准则,结合本文作者提出的一个路基土永久变形特性的实用模型,给出了计算永久变形的步骤并演示了一个算例,还分析了路基土的永久变形对柔性路面结构中两种常见损伤模式的影响。 相似文献
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高速公路沥青混凝土路面的水损害,在多雨地区尤其突出.对已建成的沥青混凝土路面,重点是对病害缺陷进行处治修复,以满足使用功能,延长其使用寿命.而在多雨高温地区,对新建的高速公路沥青混凝土路面,应在设计理念、施工方法、材料选用上提高抗水侵害的能力,减少沥青路面水损害病害的发生. 相似文献
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道路交叉口地区的沥青路面由于抗剪强度不足经常出现拥包、推挤、车辙等早期破坏。利用有限元原理对道路交叉口区域沥青路面的破坏机理进行了分析,通过计算揭示了水平力可以大大增加路面拉应力及剪应力水平,并可使路面的疲劳寿命大大降低。 相似文献
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