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首页> 外文期刊>Journal of Cleaner Production >Life cycle assessment of roadworks in United Arab Emirates: Recycled construction waste, reclaimed asphalt pavement, warm-mix asphalt and blast furnace slag use against traditional approach
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Life cycle assessment of roadworks in United Arab Emirates: Recycled construction waste, reclaimed asphalt pavement, warm-mix asphalt and blast furnace slag use against traditional approach

机译：阿拉伯联合酋长国道路工程的生命周期评估：再生建筑废物，再生沥青路面，热混合沥青和高炉炉渣采用传统方法

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Life cycle assessment methodology was applied in this study to calculate environmental impacts of a 3.5-km-long dual carriageway asphalt highway section case study in Abu Dhabi across following life cycle stages: material extraction and production, material and equipment transport, construction, maintenance and rehabilitation; assuming a 30 years lifetime. Environmental impact assessment for air emissions and energy consumption generated by complete roadworks, namely: earthworks; pavement courses; concrete works for traffic barriers, kerbs, parapets, traffic signs, and light systems. A comprehensive analysis of environmental impact reduction was performed using recycled construction waste; reclaimed asphalt pavement; warm-mix asphalt with synthetic zeolite additives; and, slag as alternate material and production options. Actual field data for the road section using virgin materials and traditional asphalt production mix for pavement works and Portland cement concrete for the complete concrete works were used as the baseline case. Routine maintenance and periodic rehabilitation by milling and repaving wearing course (4.5 cm depth) every 5 years was also analysed from an environmental impact reduction perspective. Environmental assessment considered all indicators from ReCiPe midpoint method. Results show that earthworks account for a significant portion (26% of CO(2)eq.) of the environmental impacts for complete roadworks. The life cycle impact results of hot-mix asphalt and warm-mix asphalt were almost equal due to addition of synthetic zeolites. Results showed significant environmental impact reduction across all indicators, after coupling all alternate options as: 34% in CO(2)eq.; 48% in energy consumption; 24.4% in NO(x)eq.; 21.53% in PM(2.5)eq.; 21.2% in acidification; and, 10.4% in land use. Monte Carlo simulations confirm these results and the sensitivity of environmental benefits to the allocation methodology was also investigated, which showed that the results were only marginally sensitive to the allocation approach. This study noted higher environmental benefits than reported in roadworks literature due to alternate material and asphalt production options. (C) 2020 Elsevier Ltd. All rights reserved.
机译：应用生命周期评估方法在本研究中应用了3.5公里长的双车道沥青高速公路案例研究的环境影响，在Abu Dhabi进行了以下终身循环阶段：材料提取和生产，材料和设备运输，施工，维护和设备复原;假设30年的终身。完全道路工程产生的空气排放和能耗的环境影响评估，即：土方工程;路面课程;混凝土适用于交通障碍，遏制，栏杆，交通标志和光系统。使用回收的建筑垃圾进行环境影响的综合分析;再生沥青路面;具有合成沸石添加剂的热混合沥青;而且，渣作为替代材料和生产选项。使用原始材料和传统的沥青生产混合路面工程和全面混凝土作品的沥青生产混合物的公路段的实际现场数据用作基线案例。还通过环境影响降低观点分析了每5年铣削和换档佩戴课程（<4.5厘米深度）的常规维护和周期性康复。环境评估考虑了来自食谱中点法的所有指标。结果表明，土方工程占整个道路工程的环境影响的重要部分（26％的CO（2）欧元）。由于加入合成沸石，热混合沥青和温混合沥青的生命周期影响结果几乎相等。结果显示所有指标的对环境影响显着减少，偶联所有替代选项为：34％在CO（2）欧时;能耗48％; 24.4％在否（x）方程;下午21.53％（2.5）平等;酸化21.2％;和土地使用的10.4％。 Monte Carlo模拟确认了这些结果，还研究了对分配方法的环境效益的敏感性，这表明结果仅对分配方法略微敏感。本研究指出，由于替代材料和沥青生产选择，在道路工程文学中报告的环境效益更高。 （c）2020 elestvier有限公司保留所有权利。

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