Old asphalt pavement material from quangongzi's blog

This paper introduces the application technology of old asphalt pavement material in highway maintenance project. It briefly summarizes the construction technology, material requirements and existing problems of the old asphalt pavement material recycling technology. Key words: old asphalt; pavement material; construction technology; material requirements; problem highway construction is development, conservation is development. At present, I section of the road network as a whole service function is poor, a large number of oil pipeline design standards are low, extended service, serious road surface aging and other issues. But my section of the road maintenance funds are insufficient, the past few years my section in the road maintenance and maintenance works in the old asphalt pavement material to try the recycling, practice has proved that the old asphalt pavement material recycling in road maintenance is fully applicable, and for effective The use of resources, reduce environmental pollution, saving engineering costs and so has obvious economic and social benefits.Road Repair Machines

Asphalt is a complex polymer compound, asphalt aging is essentially its chemical composition changes, aromatic fragrance reduced, asphaltene increased, decreased adhesion, the three major indicators in the penetration rate was significantly reduced, softening Point increased, the degree of decline, resulting in asphalt pavement aging, the old mineral material is still intact. If the old asphalt pavement material in the old asphalt to re-active, with the original road performance, you can use the old asphalt pavement material paved into a good recycled asphalt pavement.

In the old asphalt (residue) pavement material mixed with a certain percentage of the old asphalt regeneration reactors or new materials, after heat treatment and chemical modification, the return to the new asphalt pavement material properties, re-paved asphalt pavement , Known as recycled asphalt (residue) pavement, referred to as recycled asphalt pavement, recycled asphalt pavement for existing road asphalt pavement renovation project, large and medium repair works and minor maintenance works. Recycled asphalt pavement of the roadbed strength, compaction and other grassroots quality requirements should be consistent with the Ministry of Transportation "highway subgrade construction technical specifications" requirement. Recycled asphalt pavement is a flexible road surface area, the specific grass-roots design, reinforcement design and surface design, should be consistent with the Ministry of Transportation, "Highway flexible pavement design specifications" requirement.