泡沫沥青冷再生技术是对回收沥青路面材料和水泥稳定基层材料进行再生利用。不仅能够充分发挥旧沥青混合料的“剩余价值”，促进旧路面材料的循环利用，保护生态环境，减少资源浪费，同时，也将半刚性路面结构转为半柔性结构，延长了道路沥青的使用寿命。

The cold recycling technology of foam asphalt is to recycle the recycled asphalt pavement materials and cement stabilized base materials. Not only can it fully tap into the "residual value" of old asphalt mixtures, promote the recycling of old pavement materials, protect the ecological environment, and reduce resource waste, but it also transforms semi-rigid pavement structures into semi-flexible structures, extending the service life of road asphalt.

　　泡沫沥青又叫膨胀沥青，是将一定的常温水注入热沥青，使其发生膨胀，形成大量的沥青泡沫，经过很短的时间，沥青泡沫破裂。当泡沫沥青与集料接触时，沥青泡沫间化为数以万计的“小颗粒”，散布于细集料的表面，形成黏有大量沥青的细料填缝料，经过拌和压实，这些细料能填充于粗料之间的空隙，并形成类似砂浆的作用，使混合料达到稳定。

Foam asphalt, also called expanded asphalt, is to inject a certain amount of normal temperature water into the hot asphalt to expand it and form a large amount of asphalt foam. After a short time, the asphalt foam bursts. When the foam asphalt contacts with the aggregate, the asphalt foam turns into tens of thousands of "small particles" and spreads on the surface of the fine aggregate to form a fine joint filler with a large amount of asphalt. After mixing and compaction, these fine materials can fill the gap between the coarse materials and form a mortar like effect to stabilize the mixture.

　　泡沫沥青冷再生混合料可作为沥青下面层和基层使用，并表现出良好的性能。其优点主要表现在可以对沥青面层和基层材料进行全厚式再生，同时将半刚性基层转换为半柔性基层，符合国际柔性路面基层的潮流；泡沫沥青再生技术仅需加热沥青，不需要加热和烘干集料。从而节省能源；与半刚性基层相比，其养护时间短，施工期短，对交通影响小。

The foam asphalt cold recycling mixture can be used as the asphalt lower layer and base course, and shows good performance. Its advantages mainly lie in the ability to fully regenerate the asphalt surface layer and base material, while converting the semi-rigid base layer into a semi-flexible base layer, which is in line with the international trend of flexible pavement base layers; The foam asphalt recycling technology only needs to heat the asphalt, and does not need to heat and dry the aggregate. So as to save energy; Compared with semi-rigid base, it has shorter maintenance time, shorter construction period, and less impact on traffic.

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