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In-situ cold recycling construction method for premixed foamed asphalt base layer and subbase layer

A technology of foamed asphalt and construction method, which is applied to roads, on-site coagulation pavements, road repairs, etc. It can solve the problems of not being able to add the best ratio effectively and harmlessly, achieve high-quality performance indicators, avoid drifting, Guaranteed quality effect

Active Publication Date: 2020-08-04
北京城建远东建设投资集团有限公司 +1
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the deficiencies of the prior art, the present invention provides a premixed foamed asphalt base and subbase in-situ cold regeneration construction method, which solves the problem that the optimal ratio cannot be added effectively and harmlessly during the in-situ cold regeneration construction process. The problem of adding materials

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  • In-situ cold recycling construction method for premixed foamed asphalt base layer and subbase layer
  • In-situ cold recycling construction method for premixed foamed asphalt base layer and subbase layer
  • In-situ cold recycling construction method for premixed foamed asphalt base layer and subbase layer

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Embodiment

[0056] The invention provides a premixed foamed asphalt base and subbase in-situ cold regeneration construction method, the method includes the following steps in turn:

[0057] S1, closed traffic

[0058] One week before the preparation of the original pavement, signposts are set up at each intersection of the regenerated road section to remind drivers and pedestrians of the time to close the traffic; when the original pavement is started to be constructed, the traffic is completely closed and all vehicles are prohibited from passing; during the entire construction and maintenance process, it is completely closed Traffic on regenerated road sections; warning signs are set up on non-regenerated road sections to remind drivers and pedestrians.

[0059] S2. Original road preparation

[0060] Remove stones, garbage, weeds and other debris on the surface of the original road (including the adjacent carriageway and road shoulder that do not need to be regenerated), remove accumula...

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Abstract

The invention provides an in-situ cold recycling construction method for a premixed foamed asphalt base layer and a subbase layer, and relates to the technical field of road engineering. The method sequentially comprises the following steps: S1, closing traffic; S2, preparing an original road; S3, putting a regeneration train unit in place; S4, performing premixing, adding and paving; S5, performing milling and mixing by a cold regenerator; S6, paving a regenerated mixture; S7, performing grinding; S8, carrying out joint treatment; and S9, maintaining the product. According to the method, thedemand quantity of gravels, mineral powder, cement and foamed asphalt according to the quantity of recycled aggregate milled on the original path, the mixing water demand quantity of a premixed additive is calculated and determined in combination with the optimal water content of a recycled mixture; and pre-mixing the calculated and determined required amount of water, powdery cement, gravel aggregate and mineral powder to form the premix additive. Therefore, the powder cement is prevented from drifting away, the cement, the crushed stone aggregate and the mineral powder with the optimal ratioare effectively added, and the optimal water content of the recycled mixture and the quality of the foamed asphalt are also ensured, so that the recycled mixture has high-quality performance indexes.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a construction method for in-situ cold regeneration of a premixed foamed asphalt base and subbase. Background technique [0002] With the rapid development of highway construction in my country, the total mileage of asphalt roads has increased year by year. At the same time, many asphalt roads built in the early stage have gradually entered the maintenance stage. By the time of the "Twelfth Five-Year Plan" planning and construction period, the construction speed and maintenance speed of asphalt roads have been basically the same. At present, the maintenance of asphalt pavement in my country mainly adopts in-situ cold recycling technology of foamed asphalt. [0003] In-situ cold recycling of foamed asphalt refers to the technology of using asphalt recycling equipment to crush old asphalt pavement materials on the spot, adding appropriate asphalt and modified materials, m...

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Application Information

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IPC IPC(8): E01C7/18E01C19/10
CPCE01C7/187E01C19/1004E01C19/1072E01C19/1077
Inventor 程少东李超刚刘鑫王尧魏磊邱正清沈新兵章健骆秋雁严滚于鑫磊
Owner 北京城建远东建设投资集团有限公司
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