冷再生材料的性質(zhì)與傳統(tǒng)道路材料不完全相同，因而對成形的要求也不完全相同。冷再生材料按再生劑大致可以區(qū)分為兩類：無機(jī)再生劑和瀝青再生劑，瀝青再生時往往加入少量水泥以提高其抗水損壞能力。常用的無機(jī)再生劑是水泥，其他還有二灰、水泥粉煤灰等。無機(jī)穩(wěn)定冷再生一般按照傳統(tǒng)的半剛性材料進(jìn)行成形和養(yǎng)生。常溫下進(jìn)行重型擊實試驗或者振動擊實試驗，在20℃或者25℃下養(yǎng)生7天。

The properties of cold recycled materials are not completely the same as traditional road materials, so the requirements for forming are also not completely the same. Cold recycled materials can be roughly divided into two categories based on rejuvenators: inorganic rejuvenators and asphalt rejuvenators. During asphalt regeneration, a small amount of cement is often added to improve its resistance to water damage. The commonly used inorganic rejuvenator is cement, and there are other types such as fly ash and cement fly ash. Inorganic stable cold regeneration is generally formed and cured using traditional semi-rigid materials. Conduct heavy compaction test or vibration compaction test at room temperature, and maintain for 7 days at 20 ℃ or 25 ℃.

通過含水量-強(qiáng)度關(guān)系確定佳含水量。瀝青穩(wěn)定劑冷再生時的情況比較復(fù)雜，尚無統(tǒng)一方法。冷再生材料組成設(shè)計方法常見的方法是用擊實法確定佳液體量，用馬歇爾穩(wěn)定度、干劈裂強(qiáng)度、濕劈裂強(qiáng)度中的一個或幾個達(dá)到優(yōu)來確定瀝青用量。

Determine the optimal moisture content through the relationship between moisture content and strength. The situation during cold regeneration of asphalt stabilizers is quite complex, and there is no unified method yet. The common method for designing the composition of cold recycled materials is to use the compaction method to determine the optimal liquid volume, and to use one or more of Marshall stability, dry splitting strength, and wet splitting strength to determine the optimal asphalt dosage.

熱拌瀝青混合料層+冷再生層+舊有基層。舊有基層一般是砂礫基層。目前國內(nèi)的冷再生道路其中使用較多的結(jié)構(gòu)有熱拌瀝青混合料層+再生層+半剛性層和熱拌瀝青混合料層+再生層。隨著我國大量的路面進(jìn)入維修期，路面冷再生技術(shù)會得到更廣泛的使用。文章總結(jié)了國內(nèi)外再生的技術(shù)要點。國內(nèi)對冷再生前評價尚無專門的評價方法，需要進(jìn)一步研究；冷再生材料開始一般作為基層使用，目前逐步作為下面層使用；在我國冷再生施工中，水泥作為再生劑較多其實驗方法已經(jīng)較為統(tǒng)一，主要的參考傳統(tǒng)的半剛性材料；而瀝青作為再生劑的冷再生實驗方法還不統(tǒng)一，需要進(jìn)一步研究確定合理的實驗方法。

Hot mix asphalt mixture layer+cold recycled layer+existing base layer. The old base layer is usually a gravel base layer. At present, the structures commonly used in cold recycled roads in China include hot mix asphalt mixture layer+recycled layer+semi-rigid layer and hot mix asphalt mixture layer+recycled layer. With a large number of road surfaces entering the maintenance period in our country, cold pavement regeneration technology will be more widely used. The article summarizes the technical points of regeneration both domestically and internationally. There is currently no specialized evaluation method for cold regeneration in China, and further research is needed; Cold recycled materials are generally used as base layers and are gradually being used as lower layers; In China's cold recycling construction, cement is widely used as a rejuvenator, and its experimental methods have become relatively uniform, mainly referring to traditional semi-rigid materials; The experimental method for cold regeneration of asphalt as a rejuvenator is not yet unified, and further research is needed to determine a reasonable experimental method.