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Cold-regeneration quick repairing material and preparation method thereof

A repair material and cold recycling technology, which is applied in the field of road maintenance, can solve the problems of slow strength development, hindering the recycling rate of old asphalt mixture, and limiting the application range of emulsified asphalt cold recycling materials, etc.

Inactive Publication Date: 2017-04-26
GUIZHOU TRANSPORTATION PLANNING SURVEY & DESIGN ACADEME
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the emulsified asphalt cold recycling technology still has the disadvantages of slow and low strength development and poor water stability, so it is mostly used for the base layer or the underlying layer, and is not suitable for the repair of asphalt pavement surface layer diseases, especially pothole diseases. Rapid repair of surface pits and grooves that cannot meet the needs of rapid on-site repairs such as traffic arterial roads with large traffic volumes, earthquake-resistant repair roads, and open traffic in a short period of time
If the emulsified asphalt cold recycled material is used in the emergency repair of pothole diseases, due to its poor water stability, it is easy to cause the repaired potholes to be damaged again under the coupling effect of rainwater and vehicle loads under the rainy and humid environment due to its poor water stability. The vicious cycle of "repair it if it is broken, and repair it if it is repaired" affects the traffic capacity of the road
These shortcomings greatly limit the application range of emulsified asphalt cold recycled materials and hinder the improvement of the recycling rate of old asphalt mixture

Method used

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  • Cold-regeneration quick repairing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] 1) First, mix 40kg of old asphalt mixture, 60kg of new aggregate, and 10kg of quartz fine sand and stir evenly, then place it in a constant temperature oven at 160±5°C, heat it for 2 hours, and then pour it into the oven that has been preheated to 110~120 ℃, add 2kg of regenerant, and mix for 60s. After mixing, take it out and put it in a cool place to cool down naturally for later use, thus forming component A;

[0017] 2) 100kg of cement obtained by compounding ordinary Portland cement P.C42.5 and P.C52.5 at a mass ratio of 3:1, calcium chloride early strength agent 1.0kg, and sodium lignosulfonate water reducer 0.5kg and 1.5kg of polypropylene fibers were mixed and stirred for 60s to form component B evenly;

[0018] 3) In the first 5 minutes of paving and rolling the milled asphalt pavement with cold recycled quick-repair material, weigh 60kg of emulsified asphalt, 40kg of water-based epoxy resin, 15kg of water, 10kg of curing agent and coupling 1kg, first mix and ...

Embodiment 2

[0021]1) First, mix 60kg of old asphalt mixture, 40kg of new aggregate, and 15kg of quartzite fine sand and stir evenly, then place it in a constant temperature oven at 160±5°C, heat it for 3 hours, and then pour it into the oven that has been preheated to 110~ Add 3kg of regenerant to an asphalt mixer at 120°C, and mix for 60s. After mixing, take it out and place it in a cool place to cool down naturally for later use, thus forming component A;

[0022] 2) 100kg of cement obtained by compounding ordinary Portland cement P.C42.5 and P.C52.5 at a mass ratio of 4:1, calcium chloride early strength agent 1.5kg, and sodium lignosulfonate water reducer Mix 0.7kg and 2.0kg polypropylene fiber and stir for 60s to form component B evenly;

[0023] 3) In the first 5 minutes of paving and rolling the milled asphalt pavement with cold recycled quick-repair material, weigh 70kg of emulsified asphalt, 30kg of water-based epoxy resin, 20kg of water, 15kg of curing agent and coupling 3kg, f...

Embodiment 3

[0026] 1) First, mix 70kg of old asphalt mixture, 30kg of new aggregate, and 20kg of quartzite fine sand and stir evenly, then place it in a constant temperature oven at 160±5°C, heat it for 4 hours, and then pour it into the oven that has been preheated to 110~ Add 4kg of regenerant to an asphalt mixer at 120°C, and mix for 90s. After mixing, take it out and place it in a cool place to cool down naturally for later use, thus forming component A;

[0027] 2) 100kg of cement obtained by compounding ordinary Portland cement P.C42.5 and P.C52.5 at a mass ratio of 5:1, calcium chloride early strength agent 2.0kg, and sodium lignosulfonate water reducer 0.8kg and 2.5kg of polypropylene fibers were mixed and stirred for 90s to form component B evenly;

[0028] 3) In the first 10 minutes of paving and rolling the asphalt pavement after milling and planing with cold recycled quick-repair material on site, weigh 80kg of emulsified asphalt, 20kg of water-based epoxy resin, 25kg of water...

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Abstract

The invention discloses a cold-regeneration quick repairing material. The cold-regeneration quick repairing material is characterized by being prepared by mixing three parts of A, B and C in a mass ratio of 1: (0.05-0.10): (0.25-0.45), wherein the component A comprises the following raw materials in parts by mass: 40 to 70 parts of old asphalt mixtures, 30 to 60 parts of new aggregates, 2 to 4 parts of regenerants, and 10 to 20 parts of fine sand; the component B comprises the following raw materials in parts by mass: 100 parts of cement, 1.0 to 2.0 parts of early strength agents, 0.5 to 0.8 part of a water reducer, and 1.5 to 2.5 parts of fibers; the component C comprises the following raw materials in parts by mass: 60 to 80 parts of emulsified asphalt, 20 to 40 parts of waterborne epoxy resin, 15 to 25 parts of water, 10 to 20 parts of curing agents, and 1 to 5 parts of coupling agents. The cold-regeneration quick repairing material disclosed by the invention has high early strength, can be opened to traffic after repairing for 1 day to greatly reduce the traffic closing time, has excellent resistance to water damage and further both has good high-temperature stability and low-temperature crack resistance, thereby being capable of carrying out quick cold-regeneration repair for pavement diseases, especially in a humid environment.

Description

technical field [0001] The invention belongs to the field of road maintenance, and in particular relates to a cold regeneration quick repair material and a preparation method thereof. Background technique [0002] The minimum design life of asphalt pavements above grade 2 in my country is 12 years. However, due to the common traffic characteristics of heavy load and large flow on roads in our country, asphalt pavements are in a state of overload for a long time, and the service life is greatly reduced. Most asphalt pavements need to be repaired. During the medium repair, the asphalt pavement as a whole has entered a period of coexistence of construction and maintenance and increasingly heavy maintenance work. When the traditional restoration process maintains the road surface, the old asphalt mixture that has been milled and planed is often discarded directly, which not only wastes resources and occupies land, but also pollutes soil and water sources if it is not handled prop...

Claims

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Application Information

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IPC IPC(8): C04B28/04C04B111/72
CPCC04B28/04C04B2111/72C04B2201/50
Inventor 石帅锋余崇俊敖清文叶青王燕芳秘林源乔东华吕晓舜
Owner GUIZHOU TRANSPORTATION PLANNING SURVEY & DESIGN ACADEME
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