QINGDAO SHUNDE PLASTIC MACHINE CO.,LTD , http://www.shunde-china.com
In-situ cold regeneration is a construction method for pavement structural layers formed directly on the old asphalt concrete pavement by milling, crushing, re-mixing, and paving compaction. In-situ cold recycling technology of asphalt concrete pavement has made full use of old road waste materials, saves natural resources, reduces costs, improves the quality of pavement structural layers, and is conducive to environmental protection. The outstanding advantages such as shortening the construction period are worthy of further research and application.
Problems and suggestions: (1) There are defects in the local roadbed of the old road, and the roadbed defects must be processed in advance, and then the road surface is rebuilt. (2) Cement should be selected with slag Portland cement with retarding property, so that the recycled mixture can be compacted before initial setting. (3) The length of the appropriate regenerative section must be determined through tests. (4) The asphalt concrete pavement base layer can all utilize recycled materials. (5) Relevant departments should consider introducing mechanical equipment manufacturing technology to achieve high standards and high quality localization of regenerators and related equipment as soon as possible to further reduce engineering costs and expand the application range of asphalt concrete pavement cold recycling technology. (6) Prepare corresponding design specifications and construction specifications as appropriate.
Cold Recycling Technology of Asphalt Concrete Pavement and Its Application
Asphalt concrete pavement regeneration technology is a new method for repairing and upgrading asphalt concrete pavement in recent years. It is a technology that regenerates the old asphalt damaged asphalt mixture by adding a certain regenerant and reuses it to build the pavement structure. At present, the general asphalt concrete pavement regeneration methods include cold regeneration and thermal regeneration. The existing waste asphalt mixture is heated and softened and regenerated, and then the recycled mixture is paved, compacted, and formed into a pavement structure layer. The asphalt concrete pavement regeneration technology is called thermal regeneration; compared with thermal regeneration, cold regeneration It is an asphalt concrete pavement regeneration technology that directly adds the existing waste asphalt mixture to the existing waste asphalt mixture for regeneration, mixing, paving, compaction and forming a pavement structure layer. Cold regeneration can be divided into cold regeneration in the factory and cold regeneration in situ.