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公路路面养护冷再生知识你了解吗?

来源:https://www.sddhfjx.com/ 日期:2021-02-02
1.冷再生材料级配
1. Grading of cold recycled materials
国内研究中常见的路面级配:水泥冷再生材料一般选用《公路路面基层施工技术规范》中的级配范围;沥青(+水泥)稳定类材料篇采用路面设计规范中的AC13或AC20级配范围,也有采用再生规范中的级配范围。
Common pavement gradation in domestic research: Cement cold recycling materials generally use the gradation range in the technical code for construction of highway pavement base; asphalt (+ cement) stabilized materials use the gradation range of AC13 or ac20 in the pavement design code, and some also use the gradation range in the recycling code.
其他曾经使用的级配有:维特根手册中的级配范围、ARRA法中的级配范围、贝雷法控制级配,也有研究者自行设计级配。
Other gradations used include: the range of gradations in wittgens manual, the range of gradations in arra method, the controlled gradations by Bailey method, and the gradations designed by researchers themselves.
2.冷再生材料成形
2. Cold recycled material forming
冷再生材料的性质与传统道路材料不完全相同,因而对成形的要求也不完全相同。冷再生材料按再生剂大致可以区分为两类:
The properties of cold recycled materials are not the same as those of traditional road materials, so the forming requirements are not the same. Cold recycled materials can be roughly divided into two types according to regenerants
无机再生剂和沥青再生剂,沥青再生时往往加入少量水泥以提高其抗水损坏能力。比较常用的无机再生剂是水泥,其他还有二灰、水泥粉煤灰等。
Inorganic regenerant and asphalt regenerant, when asphalt is recycled, a small amount of cement is often added to improve its water damage resistance. The most commonly used inorganic regenerant is cement, the others are lime fly ash, cement fly ash and so on.
                        冷再生机出租
无机稳定冷再生一般按照传统的半刚性材料进行成形和养生。常温下进行重型击实试验或者振动击实试验,在20℃或者25℃下养生7天。
Inorganic stable cold recycling is generally formed and cured according to traditional semi-rigid materials. Heavy compaction test or vibration compaction test shall be conducted at room temperature, and curing at 20 ℃ or 25 ℃ for 7 days.
通过含水量-强度关系确定含水量。沥青稳定剂冷再生时的情况比较复杂,尚无统一方法。
The water content was determined by the relationship between water content and strength. The situation of cold recycling of asphalt stabilizer is complex, and there is no unified method.
冷再生材料组成设计方法常见的方法是用击实法确定液体量,用马歇尔稳定度、干劈裂强度、湿劈裂强度中的一个或几个达到优来确定沥青用量。
The common method of composition design of cold recycled materials is to determine the amount of liquid by compaction, and determine the amount of asphalt by one or more of Marshall stability, dry splitting strength and wet splitting strength.
3.冷再生路面结构
3. Cold recycled pavement structure
国外的冷再生基本结构是:热拌沥青混合料层+冷再生层+旧有基层。旧有基层一般是砂砾基层。
The basic structure of cold recycling abroad is: hot mix asphalt mixture layer + cold recycling layer + old base. The old base is generally gravel base.
目前国内的冷再生道路其中使用较多的结构有热拌沥青混合料层+再生层+半刚性层和热拌沥青混合料层+再生层。
At present, the most commonly used structures of domestic cold recycling roads are hot mix asphalt mixture layer + recycling layer + semi-rigid layer and hot mix asphalt mixture layer + recycling layer.
随着我国大量的路面进入维修期,路面冷再生技术会得到更广泛的使用。文章总结了国内外再生的技术要点。
With a large number of pavements entering the maintenance period in China, the cold recycling technology will be more widely used. This paper summarizes the main points of regeneration technology at home and abroad.
国内对冷再生前评价尚无专门的评价方法,需要进一步研究;冷再生材料开始一般作为基层使用,目前逐步作为下面层使用;
There is no special evaluation method for pre cold recycling evaluation in China, which needs further study;
在我国冷再生施工中,水泥作为再生剂较多其实验方法已经较为统一,主要的参考传统的半刚性材料;而沥青作为再生剂的冷再生实验方法还不统一,需要进一步研究确定合理的实验方法。
In the construction of cold recycling in our country, there are many cement as recycling agent, and its experimental method has been more unified, mainly referring to the traditional semi-rigid materials; while the experimental method of asphalt as recycling agent is not unified, so it needs further research to determine the reasonable experimental method.
以上是公路路面养护冷再生知识的讲解,相信大家都有所了解了,如想了解更多精彩资讯请多多关注我们的网站。
The above is the explanation of cold recycling knowledge of highway pavement maintenance. I believe you all know it. If you want to know more wonderful information, please pay more attention to our website.
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