Cold regeneration device for foamed asphalt and base course construction process

Abstract

The invention relates to a base course construction technology used when a freeway asphalt road surface is conserved and maintained, and in particular relates to a cold regeneration device for foamed asphalt and a base course construction process. The cold regeneration device for foamed asphalt is characterized by comprising a high-temperature shower nozzle, a hot asphalt pipeline and hot asphalt, wherein the hot asphalt enters another end from one end of the hot asphalt pipeline; the lower end in the middle of the hot asphalt pipeline is vertically connected with a foamed asphalt outlet pipeline, and the upper end in the middle of the hot asphalt pipeline is vertically connected with the high-temperature shower nozzle; one side of the upper end of the foamed asphalt outlet pipeline is provided with a water inlet, and the other end of the upper end of the foamed asphalt outlet pipeline is provided with a wind inlet; the water inlet is connected with an environmental water source, and the wind inlet is connected with a hot wind source; and high-temperature steam generated by the high-temperature shower nozzle acts on the asphalt in the hot asphalt pipeline. The cold regeneration base course construction process for the foamed asphalt is divided into four steps: preparing construction; implementing the engineering; checking and verifying the engineering; and putting into operation. The cold regeneration device for foamed asphalt and base course construction process provided by the invention have the advantages of small temperature control range and easily-controlled foaming effect, and are easy in operation.

Description

technical field [0001] The invention relates to a construction technology of a base in the maintenance and repair of asphalt pavement of expressways, in particular to a foamed asphalt cold recycling device and the construction process of the base. Background technique [0002] According to the design life of asphalt pavement (15 to 20 years), many roads that have been built in my country will gradually enter the repair and maintenance stage. If traditional methods are used, a large amount of waste asphalt mixture that has been milled and planed will be discarded. On the one hand, it will cause environmental pollution. , On the other hand, it is a great waste of resources. Foamed asphalt cold recycling technology uses asphalt foaming technology to re-stabilize the discarded asphalt material after milling, and forms a pavement structure layer with certain road performance under the action of compaction work. This technology can regenerate waste asphalt pavement materials, and ...

AI Technical Summary

Problems solved by technology

However, in the currently disclosed technology, the quality of the foamed asphalt cold recycled mixture is not very high, and the asphalt foaming temperature is between 150°C and 180°C, which has a wide range and is difficult to control during the construction process.

There is not a good set of specific rolling technology to guide the construction, so how to control the construction quality of foamed asphalt cold recycled base has become a very difficult technical problem

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