在道路的生命周期中，隨著時(shí)間的推移和交通荷載的不斷作用，路面會(huì)逐漸出現(xiàn)各種病害，如裂縫、車轍、坑槽等。為了恢復(fù)道路的使用性能，延長其使用壽命，道路養(yǎng)護(hù)工作關(guān)重要。而就地冷再生技術(shù)，作為一種、且經(jīng)濟(jì)的養(yǎng)護(hù)方法，正逐漸在道路工程領(lǐng)域嶄露頭角。

　　In the lifecycle of roads, with the passage of time and the continuous action of traffic loads, various diseases such as cracks, ruts, potholes, etc. will gradually appear on the road surface. In order to restore the performance and prolong the service life of roads, road maintenance work is crucial. On site cold recycling technology, as an efficient, environmentally friendly, and economical maintenance method, is gradually emerging in the field of road engineering.

　　01就地冷再生技術(shù)的核心原理

　　The core principle of on-site cold regeneration technology

　　就地冷再生技術(shù)（In-Situ Cold Recycling）是一種直接在原路面上進(jìn)行的道路修復(fù)工藝，通過破碎舊路面材料（瀝青層或部分基層），加入再生劑（如泡沫瀝青、乳化瀝青、水泥等），經(jīng)拌和、攤鋪、壓實(shí)后形成新的路面結(jié)構(gòu)層。該技術(shù)實(shí)現(xiàn)舊料100%循環(huán)利用，屬于綠色可持續(xù)的道路養(yǎng)護(hù)技術(shù)。

　　In Situ Cold Recycling is a road repair process that is directly carried out on the original pavement. By crushing the old pavement materials (asphalt layer or part of the base course), adding regenerants (such as foam asphalt, emulsified asphalt, cement, etc.), a new pavement structure layer is formed after mixing, paving, and compaction. This technology achieves 100% recycling of old materials and belongs to green and sustainable road maintenance technology.

　　以泡沫瀝青冷再生為例，其原理是將常溫水注入熱瀝青中，使瀝青瞬間膨脹形成大量瀝青泡沫 。這些泡沫破裂后與集料接觸，化為無數(shù)“小顆?！鄙⒉加诩?xì)集料表面，形成粘有大量瀝青的細(xì)料。經(jīng)過拌和壓實(shí)，細(xì)料填充粗料間空隙，讓混合料達(dá)到穩(wěn)定狀態(tài)，從而形成性能良好的路面結(jié)構(gòu)層。

　　Taking the cold recycling of foam asphalt as an example, the principle is to inject normal temperature water into hot asphalt to make asphalt expand instantaneously to form a large amount of asphalt foam. These foam come into contact with the aggregate after breaking and become numerous "small particles" scattered on the surface of the fine aggregate, forming fine aggregate with a large amount of asphalt. After mixing and compacting, fine materials fill the gaps between coarse materials to achieve a stable state of the mixture, thereby forming a high-performance pavement structure layer.

　　02因地制宜：不同就地冷再生技術(shù)的選用策略

　　02 Tailored to local conditions: selection strategies for different on-site cold recycling technologies

　　水泥混凝土路面全厚式移動(dòng)破碎就地冷再生：是指利用移動(dòng)破碎設(shè)備，就地將舊水泥混凝土路面板全厚度破碎成具有一定級(jí)配的再生集料（或者通過添加適量的新集料后使再生集料的合成級(jí)配滿足公路水泥穩(wěn)定碎石基層的級(jí)配要求），然后添加再生劑（通常是水泥，或者摻配一定比例的其它膠凝結(jié)合料）、活性劑（如鋼渣超微粉等，改善再生結(jié)構(gòu)層的性能）、水后，通過再生機(jī)就地拌和成水泥穩(wěn)定碎石混合料，經(jīng)初壓、整平、終壓、養(yǎng)生，終形成一定厚度的再生水泥穩(wěn)定（或其它材料穩(wěn)定）碎石基層（或者中、下面層）。

　　Full thickness mobile crushing on-site cold recycling of cement concrete pavement: refers to the use of mobile crushing equipment to crush the entire thickness of old cement concrete pavement panels into recycled aggregates with a certain grading (or by adding an appropriate amount of new aggregates to make the composite grading of recycled aggregates meet the grading requirements of highway cement stabilized crushed stone base), and then adding recycling agents (usually cement, or mixed with a certain proportion of other cementitious binders), active agents (such as steel slag ultrafine powder, etc., to improve the performance of the recycled structural layer), water, and then mixing them on site with a recycling machine to form a cement stabilized crushed stone mixture. After initial pressing, leveling, final pressing, and curing, a certain thickness of recycled cement stabilized (or other material stabilized) crushed stone base is finally formed. Or the middle and lower layers.

　　瀝青路面就地冷再生雙層連鋪技術(shù)：是指使用兩套后出料模式的就地冷再生機(jī)機(jī)組，依次對(duì)原瀝青路面的瀝青面層進(jìn)行泡沫瀝青就地冷再生和水穩(wěn)基層進(jìn)行水泥就地冷再生，在水穩(wěn)基層冷再生層壓實(shí)后（初凝前）鋪設(shè)泡沫瀝青冷再生混合料，從而雙層冷再生一次性完成的瀝青路面結(jié)構(gòu)性修復(fù)技術(shù)。

　　In situ cold recycling double-layer continuous paving technology of asphalt pavement: it refers to the structural repair technology of asphalt pavement that uses two sets of in situ cold recycling machine units in the rear discharge mode to carry out foam asphalt in situ cold recycling on the asphalt surface course of the original asphalt pavement and cement in situ cold recycling on the water stabilized base course in turn. After the cold recycling layer of the water stabilized base course is compacted (before initial setting), foam asphalt cold recycling mixture is paved, so that the double-layer cold recycling can be completed once.

　　03綠色低碳與降本

　　03 Green, low-carbon and efficient cost reduction

　　△效益顯著傳統(tǒng)的道路維修方式往往會(huì)產(chǎn)生大量的廢舊路面材料，這些廢料如果處理不當(dāng)，不僅占用大量土地資源，還會(huì)對(duì)環(huán)境造成嚴(yán)重污染。而就地冷再生技術(shù)能將舊路面材料100%回收利用，大大減少了新材料的開采，降低了資源消耗和廢棄物排放。同時(shí)，冷再生施工過程無需加熱，減少了燃料消耗和有害氣體排放，助力實(shí)現(xiàn)綠色低碳的道路建設(shè)與養(yǎng)護(hù)目標(biāo)。

　　The traditional road maintenance methods often generate a large amount of waste road materials, which, if not handled properly, not only occupy a large amount of land resources but also cause serious pollution to the environment. On site cold recycling technology can recycle 100% of old pavement materials, greatly reducing the extraction of new materials, resource consumption, and waste emissions. At the same time, the cold recycling construction process does not require heating, reducing fuel consumption and harmful gas emissions, and helping to achieve the goal of green and low-carbon road construction and maintenance.

　　△經(jīng)濟(jì)效益突出使用就地冷再生技術(shù)，由于大量利用舊路面材料，減少了新材料的購置成本，同時(shí)降低了廢料運(yùn)輸和處理費(fèi)用。而且施工工序相對(duì)簡(jiǎn)化，施工工期縮短，進(jìn)一步降低了施工成本。據(jù)統(tǒng)計(jì)，與傳統(tǒng)銑刨罩面維修方法相比，采用泡沫瀝青冷再生技術(shù)可節(jié)約成本25%左右。

　　The outstanding economic benefits are achieved through the use of on-site cold recycling technology. Due to the extensive utilization of old pavement materials, the purchase cost of new materials is reduced, while the transportation and disposal costs of waste materials are also lowered. Moreover, the construction process is relatively simplified, the construction period is shortened, and the construction cost is further reduced. According to statistics, compared with the traditional milling overlay maintenance method, the use of foam asphalt cold recycling technology can save about 25% of the cost.

　　△社會(huì)效益明顯就地冷再生技術(shù)施工速度快，能快速恢復(fù)道路通行能力，減少施工對(duì)交通的影響，降低因交通擁堵造成的社會(huì)經(jīng)濟(jì)損失。同時(shí)，這種技術(shù)可以提升道路的使用性能和服務(wù)水平，為公眾提供更、舒適的出行條件。

　　The on-site cold recycling technology has significant social benefits, with fast construction speed, which can quickly restore road traffic capacity, reduce the impact of construction on traffic, and lower the socio-economic losses caused by traffic congestion. At the same time, this technology can improve the performance and service level of roads, providing safer and more comfortable travel conditions for the public.

　　04舊路新顏：就地冷再生技術(shù)應(yīng)用案例

　　04 New Look on Old Road: Application Case of On site Cold Recycling Technology

　　在全國各地，就地冷再生技術(shù)已經(jīng)得到了廣泛的應(yīng)用。如在湖南省內(nèi)沅陵S318國道大修項(xiàng)目中，采用了水泥混凝土路面全厚式移動(dòng)破碎就地冷再生技術(shù)。經(jīng)過持續(xù)跟蹤調(diào)查，實(shí)施效果良好，芯樣完整，與罩面銜接緊密 。還有在廣西貴港市S204路面中修工程中，應(yīng)用基于同步攤鋪工藝的泡沫瀝青就地冷再生技術(shù)，對(duì)原路面進(jìn)行修復(fù)。該技術(shù)一次性再生一條車道，同時(shí)完成銑刨、破碎、添加泡沫瀝青和水、拌和等工序，施工效率高，經(jīng)濟(jì)效益顯著。

　　In various parts of the country, on-site cold recycling technology has been widely applied. In the S318 National Highway overhaul project in Yuanling, Hunan Province, the full thickness mobile crushing on-site cold recycling technology for cement concrete pavement was adopted. After continuous tracking and investigation, the implementation effect is good, the core sample is complete, and it is closely connected with the cover. In addition, in the medium repair project of S204 pavement in Guigang City, Guangxi, foam asphalt in place cold recycling technology based on synchronous paving process is applied to repair the original pavement. This technology can regenerate one lane at a time, and complete milling, crushing, adding foam asphalt and water, mixing and other processes at the same time, with high construction efficiency and significant economic benefits.

　　道路就地冷再生技術(shù)憑借其獨(dú)特的優(yōu)勢(shì)，為道路養(yǎng)護(hù)和修復(fù)提供了一種創(chuàng)新且的解決方案。隨著技術(shù)的不斷發(fā)展和完善，相信它將在未來的道路建設(shè)中發(fā)揮更加重要的作用讓更多的舊路實(shí)現(xiàn)“新生”。

　　The on-site cold recycling technology for roads, with its unique advantages, provides an innovative and efficient solution for road maintenance and repair. With the continuous development and improvement of technology, it is believed that it will play a more important role in future road construction, enabling more old roads to achieve "rebirth".

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