Cold in-place recycled emulsified bitumen mixture and cold in-place recycled pavement

A technology of emulsified asphalt and mixture, applied in the direction of coagulation pavement, roads, roads and other directions paved on site, can solve the problems of threshing, loose aggregate, poor cohesion, etc., to improve low temperature flexibility and high temperature stability, The effect of increasing early strength

Inactive Publication Date: 2017-09-05
江苏北极星交通产业集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the existing technology, there are still problems such as poor cohesion in the early stage of strength formation between in-situ cold recycled mixtures, loose aggregates, threshing, and insufficient stability, which are mainly related to the demulsification speed of emulsified asphalt and the strength of recycled materials. Grading related

Method used

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  • Cold in-place recycled emulsified bitumen mixture and cold in-place recycled pavement
  • Cold in-place recycled emulsified bitumen mixture and cold in-place recycled pavement
  • Cold in-place recycled emulsified bitumen mixture and cold in-place recycled pavement

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Step 1, 300g tall oil fatty acid is added the iodine of 40g maleic anhydride and 0.6g, in N 2 Under protection, the temperature was raised to 180° C., and the reaction was carried out for 10 hours to obtain a tribasic carboxylic acid intermediate. After heating 240g of triethylenetetramine to 130°C, add 40g of lignin and 25g of paraformaldehyde step by step. After the reaction is carried out for 2 hours, add the pre-prepared tricarboxylic acid intermediate and 4g of silica gel step by step. 2 Under protective conditions, heat up to 170°C, dehydrate for 2 hours, and continue to heat up to 200°C for 2 hours to obtain a lignin cationic emulsifier, which is ready for use.

[0046] Step 2: Add about 170m1 of water to an asphalt emulsifier with an effective content of 50%, and stir gently. After the emulsifier is completely dissolved, adjust the pH of the solution to about 2.0 with concentrated hydrochloric acid, and set the volume to 200m1. Turn on the colloid mill, pour th...

Embodiment 2

[0052] Step 1, 300g tall oil fatty acid is added the iodine of 40g maleic anhydride and 0.6g, in N 2 Under protection, the temperature was raised to 180° C., and the reaction was carried out for 10 hours to obtain the intermediate of ternary shuttle carboxylic acid. After heating 240g of triethylenetetramine to 130°C, add 40g of lignin and 25g of paraformaldehyde step by step. After the reaction is carried out for 2 hours, add the pre-prepared tricarboxylic acid intermediate and 4g of silica gel step by step. 2 Under protective conditions, heat up to 170°C, dehydrate for 2 hours, and continue to heat up to 200°C for 2 hours to obtain a lignin cationic emulsifier, which is ready for use.

[0053] Step 2: Add about 170m1 of water to an asphalt emulsifier with an effective content of 50%, and stir gently. After the emulsifier is completely dissolved, adjust the pH of the solution to about 2.0 with concentrated hydrochloric acid, and set the volume to 200m1. Turn on the colloid m...

Embodiment 3

[0061] Step 1, 300g tall oil fatty acid is added the iodine of 40g maleic anhydride and 0.6g, in N 2 Under protection, the temperature was raised to 180° C., and the reaction was carried out for 10 hours to obtain the intermediate of ternary shuttle carboxylic acid. After heating 240g of triethylenetetramine to 130°C, add 40g of lignin and 25g of paraformaldehyde step by step. After the reaction is carried out for 2 hours, add the pre-prepared tricarboxylic acid intermediate and 4g of silica gel step by step. 2 Under protective conditions, heat up to 170°C, dehydrate for 2 hours, and continue to heat up to 200°C for 2 hours to obtain a lignin cationic emulsifier, which is ready for use.

[0062] Step 2: Add about 170m1 of water to an asphalt emulsifier with an effective content of 50%, and stir gently. After the emulsifier is completely dissolved, adjust the pH of the solution to about 2.0 with concentrated hydrochloric acid, and set the volume to 200m1. Turn on the colloid m...

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Abstract

The invention discloses a cold in-place recycled emulsified bitumen mixture and a cold in-place recycled pavement. The emulsified bitumen mixture comprises the following raw materials by mass: 2 to 3 parts of a premixed cementing material, 10 to 20 parts of broken stone, 100 parts of a RAP reclaimed material, 2 to 2.5 parts of emulsified bitumen, 1 to 1.5 parts of an old bitumen activator and 1 to 1.5 parts of waterborne polyurethane epoxy resin. According to the cold in-place recycled emulsified bitumen mixture in the invention, waterborne polyurethane epoxy resin is added into the RAP reclaimed material and the old bitumen activator, so the low-temperature flexibility and high-temperature stability of the cold in-place recycled emulsified bitumen mixture are greatly improved; the broken stone and the premixed cementing material are added to improve the mechanical strength of the mixture and provide the mixture with sufficient bearing capacity; and latex emulsion is added, so the early strength of the cold in-place recycled emulsified bitumen mixture is greatly improved.

Description

technical field [0001] The invention relates to the technical field of road maintenance, in particular to emulsified asphalt mixture and cold-in-place recycled road surface. Background technique [0002] The emulsified asphalt in-situ cold recycling construction process is efficient and has a high utilization rate for pavement recycled aggregates, and the emulsified asphalt cold recycling technology is constructed at room temperature without heating the asphalt, which avoids performance attenuation caused by high temperature aging of the asphalt, thereby improving The anti-fatigue performance of the pavement prolongs the service life of the pavement. At the same time, this technology can accurately control the thickness of the paving layer without damaging the roadbed, improve the performance of the road surface, and improve the grade of the old road. In the treatment of asphalt pavement rutting, load-type cracks and non-load-type cracks and other diseases and pavement over...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L75/04C08L63/00C08L9/08C08L11/02C08L7/02C08L23/08C08L91/00C08K3/34E01C7/20
CPCC08L95/00C08L2201/08C08L2205/025C08L2205/035C08L2207/22E01C7/20C08L75/04C08L63/00C08L9/08C08L11/02C08L7/02C08L23/0853C08L91/00C08K3/34
Inventor 商健林方博文李强王永辉张华丽季耀波
Owner 江苏北极星交通产业集团有限公司
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