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首页> 外文会议>Transportation Association of Canada conference exhibition >RECYCLED CONCRETE AGGREGATE IN CONCRETE PAVEMENTS: A FIVE YEAR STUDY ON ITS EFFECT ON PAVEMENT PERFORMANCE
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RECYCLED CONCRETE AGGREGATE IN CONCRETE PAVEMENTS: A FIVE YEAR STUDY ON ITS EFFECT ON PAVEMENT PERFORMANCE

机译：混凝土路面中的再生混凝土集料：对路面性能影响的五年研究

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Recycled Concrete Aggregate (RCA) from demolished concrete is becoming increasingly available. Its use in the construction of new concrete pavements provides both environmental and economic benefits. The recycling of waste concrete as aggregate reduces the demand for virgin aggregates, of which there will be a critical shortage in the future. The use of RCA also protects the landscape and the environment by deferring the need to open new quarries, reducing the impact on landfills and decreasing energy consumption. Four pavement test sections were constructed in 2007 at the University of Waterloo's Centre for Pavement and Transportation Technology (CPATT) test track facility at the Region of Waterloo's waste management site. The test sections contain varying amounts of RCA in the concrete mix. Instrumentation was embedded in each section to assess the effects of environmental factors, including temperature and moisture gradients, on long-term pavement performance. Each test section was provided with sensors to measure strains, slab curling and warping, joint movement and concrete maturity. This paper presents a brief overview of the design and construction of the CPATT RCA sections, as well as a five-year performance evaluation of the pavement sections using sensor data and visual condition survey results. To date, comparable performance has been observed in all RCA sections, in comparison to the control section, suggesting that RCA is a suitable component for durable, long-lasting concrete pavements.
机译：拆除混凝土中的再生混凝土骨料（RCA）越来越多。在新的混凝土路面施工中使用它可以提供环境和经济效益。废弃混凝土作为骨料的回收减少了对原始骨料的需求，未来将严重短缺这种骨料。 RCA的使用还通过推迟开放新采石场，减少对垃圾填埋场的影响并降低能耗的方式来保护景观和环境。 2007年，在滑铁卢大学废物管理站点地区的滑铁卢大学路面与运输技术中心（CPATT）测试轨道设施上建造了四个路面测试段。测试部分在混凝土混合物中包含不同数量的RCA。每个部分都嵌入了仪表，以评估环境因素（包括温度和湿度梯度）对长期路面性能的影响。每个测试部分都配备了传感器，以测量应变，板坯的卷曲和翘曲，接缝运动和混凝土成熟度。本文简要介绍了CPATT RCA部分的设计和施工，并使用传感器数据和视觉状况调查结果对路面部分进行了为期五年的性能评估。迄今为止，与控制部分相比，在所有RCA部分中都观察到了可比的性能，这表明RCA是用于耐用，长效混凝土路面的合适组件。

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