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首页> 外文期刊>The international journal of pavement engineering & asphalt technology >SUSTAINABLE MAINTENANCE OF A UK TRUNK ROAD USING CRACK AND SEAT AND EX SITU COLD MIX RECYCLING - A CASE STUDY
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SUSTAINABLE MAINTENANCE OF A UK TRUNK ROAD USING CRACK AND SEAT AND EX SITU COLD MIX RECYCLING - A CASE STUDY

机译：使用裂纹和阀座以及现场冷混合回收技术对英国卡车道路进行可持续维护-案例研究

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摘要

TRL's research since the early 1990s has led to crack, seat and overlay (CSO) becoming an established technique for the cost-effective rehabilitation of flexible composite roads in the UK. The treatment does, however, require exposure of the underlying lean concrete base and placement of a new hot mix asphalt overlay which results in the transportation and disposal of large amounts of asphalt planings. When Cemex UK won an Early Contractor Involvement contract for a major CSO maintenance scheme on the A46 trunk road in Warwickshire, an opportunity existed to improve the sustainability of the proposed maintenance treatment by incorporating ViaFoam cold recycled base material (CRBM) within the new overlay. With TRL's assistance, Cemex produced an innovative design for the pavement which utilised both crack and seat and ViaFoam which would be produced in an ex situ process using their mobile plant and utilising the asphalt planings arising from the crack and seat phases of the scheme. It is believed that this is the first time in the UK that a CRBM has been used in conjunction with CSO of a flexible composite pavement. This paper presents a case study of the design, construction and in-service performance of the scheme. This includes the considerations employed when using the combination of two techniques with differing design procedures and the observations and measurements taken during construction. An estimation of the CO_2 savings made when compared to more conventional maintenance methods has also been made. The findings of a TRL investigation into the condition of the pavement after one year are provided together with suggestions for future performance monitoring of the site.
机译：自1990年代初以来，TRL的研究已导致裂缝，座椅和覆盖层（CSO）成为英国柔性复合道路经济有效的修复技术。但是，该处理的确需要暴露下面的贫混凝土基础并放置新的热拌沥青覆盖层，这会导致运输和处置大量的沥青刨花板。当Cemex UK获得沃里克郡A46主干道主要CSO维护计划的早期承包商参与合同时，就有机会通过将ViaFoam冷再生基础材料（CRBM）纳入新覆盖层中来提高建议维护方法的可持续性。在TRL的协助下，Cemex为人行道生产了一种创新设计，该产品既利用裂缝又利用座椅和ViaFoam进行生产，该产品将使用其移动设备在非原位工艺中生产，并利用该方案的裂缝和底座阶段产生的沥青刨光。相信这是在英国首次将CRBM与柔性复合路面的CSO结合使用。本文介绍了该方案的设计，施工和在役性能的案例研究。这包括将两种技术与不同的设计程序结合使用时的考虑因素，以及在施工过程中进行的观察和测量。与更常规的维护方法相比，还可以估算出二氧化碳的节省量。提供了TRL一年后对路面状况的调查结果，并提供了对该站点进行未来性能监控的建议。

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