冷再生的工作原理筆者與維特根北美副總裁Mark Stahl進行了訪談，探討了道路所有者和承包商客戶選擇冷再生作為道路修復方法所帶來的令人難以置信的機遇。據Stahl稱，冷再生雖然并非新技術，但因其可持續性、成本和效率優勢而在北美重新受到關注。

　　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世紀70年代推出，指在環境溫度下對路面進行再生，用于道路翻新和重鋪項目。施工人員將瀝青道路銑削縮小到原始骨料大小，然后添加粘合劑。重新鋪設瀝青路面后，在其上面鋪設磨耗層；在高車流路面上，磨耗層可以是另一層瀝青，在低流量道路上，可以是泥漿封層或碎石封層。

　　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.

　　根據道路狀況，冷再生可以采用部分深度置換或全深度再生（FDR）的方式進行。有多種冷再生方法，包括就地冷再生，即在施工現場的攤鋪機內處理RAP，以及場外冷再生（CCPR），即在場外處理儲存的RAP。與場外冷再生相比，現場冷再生效率更高、成本更低、排放會更少，因為所有材料都在工作現場提取并重復利用。

　　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.

　　冷再生的目標是打造永久性路面，“瀝青路面聯盟”將其描述為“一種高強度的柔性路面，可以長期（至少50年）抵抗結構疲勞損傷，從而實現長壽命。因為沒有自下而上的路面損傷，結構完整性可以無限期地保持不變。

　　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.

　　這些長效瀝青結構可以通過僅保留和更新表層來實現經濟地維護，無需進行大規模的修復或重建。”現場冷再生已在加拿大不列顛哥倫比亞省、阿爾伯塔省和安大略省等地的施工現場取得成功。Stahl說，在美國，有一些熱點地區——當地的冷再生倡導者提高客戶對這種施工工藝優勢的認知——包括加利福尼亞州、中西部和東部各州。

　　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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