Foamed asphalt cold-recycling lime-fly-ash crush stone mixture and preparation method thereof

A technology of foamed asphalt and limestone crushed stone, which is applied in the field of cold recycled mixture and its preparation, can solve the problems of reflection cracks, frequent occurrence of road surface diseases, inconvenient construction, etc., and achieves the effects of reducing emissions, reducing disease occurrence and protecting cultivated land.

Inactive Publication Date: 2016-02-24
JSTI GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The maintenance of the traditional fly ash macadam base adopts cement stabilized macadam backfill or cement on-site cold regeneration of fly ash macadam. The construction is inconvenient due to the accumulation of fly ash macadam milling materials, and the traditional repair technology results in semi-rigidity. The base asphalt pavement has the problem of reflection cracks, and pavement diseases occur frequently

Method used

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  • Foamed asphalt cold-recycling lime-fly-ash crush stone mixture and preparation method thereof
  • Foamed asphalt cold-recycling lime-fly-ash crush stone mixture and preparation method thereof
  • Foamed asphalt cold-recycling lime-fly-ash crush stone mixture and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0023] Composition of foamed asphalt cold recycled lime-ash gravel mixture (parts by weight):

[0024] 1. Recycled old materials: 880 copies of RAP material (milling material for the lime-ash gravel base layer at the crack of the old road surface);

[0025] 2. Newly added materials: 100 parts of aggregate (particle size 9.5~13.2mm), 25 parts of foamed asphalt (Jinling Petrochemical No. 70 road petroleum asphalt), of which 0.625 parts of foamed asphalt foaming water consumption and 20 parts of ordinary Portland cement Parts, 31 parts of water (the amount of water added is determined according to the moisture content of the milling material);

[0026] Preparation process steps:

[0027] Step 1: Add the dispersed RAP material to the aggregate and mix evenly at room temperature, then add ordinary Portland cement, mix for 30s, and add potable water in proportion to mix for 30s;

[0028] Step 2: Use special asphalt foaming equipment to foam 70# matrix asphalt at a temperature of 160°C and a ...

Embodiment 2

[0034] Composition of foamed asphalt cold recycled lime-ash gravel mixture (parts by weight):

[0035] 1. Recycled old materials: 980 copies of RAP material (milling material for lime-ash gravel base layer at the cracks of the old road surface);

[0036] 2. Newly added materials: 25 parts of foamed asphalt (Jinling Petrochemical No. 70 road petroleum asphalt), including 0.625 parts of foamed asphalt foaming water, 20 parts of ordinary Portland cement, 31 parts of potable water (according to the water content of milling materials Rate determines the amount of water added);

[0037] Preparation process steps:

[0038] Step 1: Add the dispersed RAP material to ordinary Portland cement, mix for 40s, and add potable water in proportion to mix for 30s;

[0039] Step 2: Use special asphalt foaming equipment to foam 70# matrix asphalt at a temperature of 150°C and a water consumption of 2.5%;

[0040] Step 3: Add the prepared foamed asphalt to the mixed material mixed in step 1, and fully stir ...

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Abstract

The invention discloses a foamed asphalt cold-recycling lime-fly-ash crush stone mixture and a preparation method thereof. The mixture comprises a recycled old material, cement, foamed asphalt and water. The mixture and the preparation method have the advantages that a foamed asphalt recycling lime-fly-ash crush stone base layer technology is adopted, so that a plenty of aggregate materials needed for paving a new semi-rigid base layer are saved, the land stacking treatment of the lime-fly-ash crush stone old material is not needed, the land is saved, and the cultivated land is protected; the crack resistance, water stability performance and anti-washing performance of the base layer are improved; the lime-fly-ash crush stone base layer maintenance problem can be effectively solved, and the resource cyclic utilization is promoted; through the foamed asphalt recycling lime-fly-ash crush stone base layer, the damage to the asphalt pavement is reduced, the pavement driving quality is ensured, and the effect of prolonging the service life of the asphalt pavement is achieved.

Description

Technical field [0001] The invention relates to a cold recycled mixture and a preparation method thereof, in particular to a foamed asphalt cold recycled lime-ash gravel mixture and a preparation method thereof. Background technique [0002] A large number of damages to the asphalt pavement of the lime-ash macadam base are the focus of current high-grade road maintenance. In view of the environmental resource conservation and high-performance asphalt pavement requirements, the treatment of the lime macadam base becomes an important issue to be solved urgently. The traditional two-ash crushed stone base is repaired by cement stabilized crushed stone backfill or cement in-situ cold recycled two-ash crushed stone scheme. Due to the stacking of two-ash crushed stone milling material, construction is inconvenient, and traditional repair techniques are used to cause semi-rigid The base asphalt pavement has the problem of reflection cracks, and pavement diseases frequently occur. [0003...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B18/16
CPCY02W30/91
Inventor 郑炳锋吴春颖温肖博刘伟韦武举严金海胡兴国汪立诚潘彬高壮元
Owner JSTI GRP CO LTD
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