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首页> 外文期刊>Journal of Cleaner Production >Optimizing the asphalt pavement cold in-place recycling process containing waste pozzolans based on economic-environmental-technical criteria
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Optimizing the asphalt pavement cold in-place recycling process containing waste pozzolans based on economic-environmental-technical criteria

机译：根据经济-环境技术标准优化含废火山灰的沥青路面冷就地回收工艺

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In this research, it was tried to determine an optimized procedure in CIR process regarding the stabilizer additive type used to accelerate the setting of bitumen emulsion and executive thicknesses by considering the technical, environmental and economic criteria. Three stabilizers were studied including type II Portland cement (cement) as conventional stabilizer, coal combustion ash (CCA) and lime activated coal waste ash (LA-CWA) at rate of 2, 8 and 8% by weight of recycled asphalt pavement, respectively. In economic-environmental analysis the reconstruction method with unbound base and hot mix asphalt overlay was also analyzed as a conventional rehabilitation method. Four different thicknesses were considered for CIR layer including 10, 15, 20 and 25 cm. Furthermore, four equivalent single axle loads from 1 to 50 million were considered in designing the pavement structures. Based the results, by considering the total energy usage and CO2 emissions, implementing CIR layer with thicknesses lower than 20 cm is a sustainable rehabilitation technique, while the executive costs encouraged higher thicknesses than 20 cm. Among the pozzolanic additives, the use of LA-CWA resulted in more variable results in comparison to CCA. Therefore, considering the risk of construction processes, CCA can be recommended as a more reliable replacement of cement than LA-CWA. (C) 2019 Elsevier Ltd. All rights reserved.
机译：在这项研究中，尝试通过考虑技术，环境和经济标准，针对用于加速沥青乳液凝结和有效厚度的稳定剂添加剂类型，确定CIR工艺中的优化程序。研究了三种稳定剂，包括II型波特兰水泥（水泥）作为常规稳定剂，燃煤灰（CCA）和石灰活化煤coal石灰（LA-CWA），分别占再生沥青路面重量的2、8和8％。 。在经济环境分析中，还分析了无粘结基层和热拌沥青覆盖层的重建方法，作为常规的修复方法。对于CIR层考虑了四种不同的厚度，包括10、15、20和25 cm。此外，在设计人行道结构时，考虑了四个等效的单轴载荷，从1到5000万。根据结果​​，通过考虑总能源使用量和CO2排放量，实施厚度小于20 cm的CIR层是一种可持续的修复技术，而执行成本则鼓励厚度大于20 cm的CIR层。在火山灰添加剂中，与CCA相比，LA-CWA的使用导致更多的可变结果。因此，考虑到施工过程的风险，可以推荐使用CCA作为比LA-CWA更可靠的水泥替代品。 （C）2019 Elsevier Ltd.保留所有权利。

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