冷再生的工作原理笔者与维特根北美副总裁Mark Stahl进行了访谈，探讨了道路所有者和承包商客户选择冷再生作为道路修复方法所带来的令人难以置信的机遇。据Stahl称，冷再生虽然并非新技术，但因其可持续性、成本和效率优势而在北美重新受到关注。

　　The working principle of cold regeneration was discussed in an interview with Mark Stahl, Vice President of Wirtgen North America, to explore the incredible opportunities that road owners and contractor clients can bring by choosing cold regeneration as a road repair method. According to Stahl, although cold regeneration is not a new technology, it has regained attention in North America due to its sustainability, cost, and efficiency advantages.

　　冷回收最早于20世纪70年代推出，指在环境温度下对路面进行再生，用于道路翻新和重铺项目。施工人员将沥青道路铣削缩小到原始骨料大小，然后添加粘合剂。重新铺设沥青路面后，在其上面铺设磨耗层；在高车流路面上，磨耗层可以是另一层沥青，在低流量道路上，可以是泥浆封层或碎石封层。

　　Cold recycling was first introduced in the 1970s, referring to the regeneration of road surfaces at ambient temperatures for use in road renovation and resurfacing projects. The construction personnel will mill the asphalt road to the original aggregate size and then add adhesive. After re laying the asphalt pavement, lay a wearing layer on top of it; On high traffic roads, the wear layer can be another layer of asphalt, while on low traffic roads, it can be a slurry seal or gravel seal.

　　根据道路状况，冷再生可以采用部分深度置换或全深度再生（FDR）的方式进行。有多种冷再生方法，包括就地冷再生，即在施工现场的摊铺机内处理RAP，以及场外冷再生（CCPR），即在场外处理储存的RAP。与场外冷再生相比，现场冷再生效率更高、成本更低、排放会更少，因为所有材料都在工作现场提取并重复利用。

　　According to the road conditions, cold regeneration can be carried out through partial depth replacement or full depth regeneration (FDR). There are various cold recycling methods, including on-site cold recycling, which involves processing RAP in the paving machine at the construction site, and off-site cold recycling (CCPR), which involves processing stored RAP outside the site. Compared with off-site cold recycling, on-site cold recycling has higher efficiency, lower cost, and fewer emissions because all materials are extracted and reused at the work site.

　　冷再生的目标是打造永久性路面，“沥青路面联盟”将其描述为“一种高强度的柔性路面，可以长期（至少50年）抵抗结构疲劳损伤，从而实现长寿命。因为没有自下而上的路面损伤，结构完整性可以无限期地保持不变。

　　The goal of cold recycling is to create permanent pavement, described by the Asphalt Pavement Alliance as "a high-strength flexible pavement that can resist structural fatigue damage for a long time (at least 50 years), thereby achieving a long lifespan. Because there is no bottom-up pavement damage, structural integrity can be maintained indefinitely.

　　这些长效沥青结构可以通过仅保留和更新表层来实现经济地维护，无需进行大规模的修复或重建。”现场冷再生已在加拿大不列颠哥伦比亚省、阿尔伯塔省和安大略省等地的施工现场取得成功。Stahl说，在美国，有一些热点地区——当地的冷再生倡导者提高客户对这种施工工艺优势的认知——包括加利福尼亚州、中西部和东部各州。

　　These long-lasting asphalt structures can be economically maintained by retaining and updating only the surface layer, without the need for large-scale repair or reconstruction. ”On site cold recycling has achieved success at construction sites in British Columbia, Alberta, and Ontario, Canada. Stahl said that in the United States, there are some hot spots - local cold recycling advocates raising customers' awareness of the advantages of this construction process - including California, the Midwest, and Eastern states.

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