Cooling regeneration method of asphalt added with foam asphalt

A foamed asphalt, cold recycling technology, applied in the field of asphalt cold recycling with foamed asphalt, can solve the problems of heavy traffic interference, low utilization rate of old materials, low utilization rate of old pavement materials, etc.

Inactive Publication Date: 2006-04-12
SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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  • Summary
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Problems solved by technology

However, only 20-30% of old materials can be mixed in the centralized factory mixing regeneration, and the utilization rate of old materials is low, which affects economic benefits. Asphalt mixing plants need to have old materials stacking sites and special crushing machines
Concentrated plant-mixed regeneration has been used in road maintenance in my country for many years, and its shortcomings are becoming more and more obvious. The utilization rate of old pavement materials is low, there are many problems in the treatment of waste materials and environmental pollution, and the maintenance time is long. Large interference, etc., generally can only be used for the renovation of the base or low-grade road surface, need a special factory to process the asphalt mixture, the cost is high

Method used

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Examples

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Embodiment 1

[0007] Example 1 Heat 200kg of heavy-duty AH-90 asphalt to 135°C with heat-conducting oil in a 5t asphalt tank, then add 10Kg of azodicarbonamide foaming agent, start the stirring blade, and the asphalt foams rapidly. The volume expansion is 10 to 15 times, and the foamed asphalt is obtained.

[0008] During asphalt pavement recycling construction, use an infrared plate heater or fuel heater to heat the old asphalt pavement to about 160°C in front, and a remixer follows the heater to loosen the pavement and mix The material is recovered into the mixing drum, 0.5% cement is added to mix with the mixture, and finally 3% foamed asphalt is sprayed and mixed evenly, and the mixed recycled asphalt mixture is pumped to the paving tank for paving, 5 minutes Then compact it with a road roller.

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Abstract

A method for the in-situ cold regeneration of asphalt on pavement by adding foam asphalt includes such steps as heating the old asphalt pavement to 160 deg.C by plate-type heater, loosening the asphalt pavement by a machine following said plate-type heater, recovering the mixture back into a stirring drum, adding cement, stirring, spraying foam asphalt, stirring, pumping the mixture onto road, spreading, and compacting.

Description

technical field [0001] The invention relates to a method for asphalt cold regeneration, in particular to a method for asphalt cold regeneration with foamed asphalt added. Background technique [0002] my country's highway construction is developing rapidly. So far, the national expressway mileage has exceeded 30,000 kilometers, ranking second in the world. The expressway network has initially formed in the eastern part of my country, and the high-grade highway has exceeded 500,000 kilometers, most of which are asphalt roads. [0003] It is estimated that the annual amount of asphalt used in road construction in my country has exceeded 12 million tons, and road construction and maintenance consume a large amount of asphalt. In 2003 alone, the national road construction consumed 7.5 million tons of asphalt, of which 1.8 million tons were imported. Petroleum resources are non-renewable resources, and excessive exploitation will cause resource depletion...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/10
Inventor 周君鲁红春何唯平
Owner SHENZHEN OCEAN POWER INDUSTRIAL CO LTD
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