Sustainable Recycled Materials for Concrete Pavements
Sustainable Recycled Materials for Concrete Pavements
复制标题
用于混凝土路面的可持续再生材料
DOI：
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发表时间：
2011
期刊：
影响因子：
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通讯作者：
Kurt Smith
中科院分区：
文献类型：
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作者：
Prashant V. Ram;T. Dam;J. Meijer;Kurt Smith
密歇根州交通部(MDOT)在混凝土路面上使用回收和工业副产品材料(RIBM)方面拥有丰富的经验。其中大部分集中在实验室调查上，很少有工作专门量化在混凝土路面应用中使用RIBM的经济和环境效益和成本。在这项研究项目中，生命周期成本分析(LCCA)和环境生命周期评估(ELCA)技术被用于量化选定数量的MDOT混凝土路面路段的经济和环境影响。所研究的路面包括使用和不使用辅助胶凝材料(SCM)、使用和不使用混凝土碎石(CCA)以及使用和不使用风冷高炉矿渣粗集料(ACBFS)的路面。研究发现，在所有交通类别中，在铺路混凝土中使用ACBFS粗集料建造的人行道具有最高的代理成本(就LCCA而言)。在路面混凝土中使用CCA建造的路面在交通量较低的情况下表现出与天然粗集料路段相当的性能(就寿命周期代理成本而言)；然而，在交通量较高的情况下，大多数路面在使用约20年后进行了重大修复或重建活动。总体而言，这项研究的结果强调，随着路面寿命的延长，实现了更高水平的可持续性，如果实现了寿命，SCM和CCA的使用将导致经济和环境生命周期指标的进一步改善。
The Michigan Department of Transportation (MDOT) has considerable experience in using recycled and industrial byproduct materials (RIBMs) in concrete pavements. Much of this has focused on laboratory investigations, with very little work done to to specifically quantify the economic and environmental benefits and costs of using RIBMs in concrete pavement applications. In this research project, life-cycle cost analysis (LCCA) and environmental life-cycle assessment (ELCA) techniques are used to quantify the economic and environmental impacts for a selected number of MDOT concrete pavement sections. Pavements studied include those constructed with and without supplementary cementitious materials (SCMs), with and without crushed concrete aggregate (CCA), and with and without air-cooled blast furnace slag coarse aggregate (ACBFS). It was found that pavements constructed using ACBFS coarse aggregates in the paving concrete had the highest agency costs (in terms of LCCA) in all traffic categories. Pavements constructed using CCA in the paving concrete exhibited comparable performance (in terms of life-cycle agency costs) to sections with natural coarse aggregates at lower traffic volumes; however, at higher traffic volumes the majority of them underwent major rehabilitation or reconstruction activities after about 20 years of service. In general, findings from this study emphasize that higher levels of sustainability are achieved with increased pavement longevity, and that if longevity is achieved, the use of SCMs and CCA result in further improvements in both the economic and environmental life-cycle indicators.