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Warm Mix Asphalt Paving Technologies: a Road Builder’s Perspective

机译：暖拌沥青摊铺技术：道路建设者的观点

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摘要

The asphalt paving industry is constantly exploring technological improvements that will enhance the material’s performance, increase construction efficiency, conserve resources, and advance environmental stewardship. Current and impending regulations on emissions and energy conservation are making attractive the reductions in asphalt mix production temperature. Warm mix asphalt (WMA) is a means to this end and several systems have been developed including: foaming, emulsions, additives, synthetic binders and others. Warm mix asphalt is produced at temperatures 20 to 40ºC lower than hot mix asphalt (HMA). rnThe immediate benefit of producing and placing asphalt mixes at a lower temperature is the reduction in energy consumption, greenhouse gas emissions, fumes, and odors generated at the plant and the paving site. Furthermore, the technical benefits are substantial including reduction of short term binder hardening, reduction of mixture tenderness, possible increase of percentage of reclaimed asphalt pavement in new asphalt pavement mixes and possible extension of the construction season. rnThis paper presents an overview of the current warm mix asphalt state-of-practice. A review of the various warm mix asphalt systems is provided. Findings of various studies concerning the observed and measured field performance and the environmental benefits in terms of energy conservation and reduced greenhouse gas emissions are also detailed in the paper.
机译：沥青摊铺行业正在不断探索技术改进，以提高材料的性能，提高建筑效率，节约资源并促进环境管理。当前和即将颁布的有关排放和节能的法规正使降低沥青混合料生产温度的目标引人注目。温拌沥青（WMA）是达到此目的的一种手段，并且已经开发了多种系统，包括：发泡，乳液，添加剂，合成粘合剂等。温拌沥青的生产温度比热拌沥青（HMA）低20至40ºC。 rn在较低的温度下生产和放置沥青混合料的直接好处是减少了能源消耗，温室气体排放，烟雾和工厂和摊铺现场产生的气味。此外，技术上的好处是可观的，包括减少了短期的粘合剂硬化，减少了混合物的柔软性，可能增加了新沥青路面混合物中再生沥青路面的百分比，并可能延长了施工季节。 rn本文概述了当前的热拌沥青实践状态。提供了各种温拌沥青系统的综述。本文还详细介绍了各种有关观测和测量的田间性能以及在节能和减少温室气体排放方面的环境效益的研究结果。

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