Asphalt mixture for rapid repair of hot-mix-cold-laid pavement

A technology of asphalt mixture and cold paving, which is applied to the coagulation pavement, roads, roads and other directions of on-site paving, which can solve the problem of unknown formula and other problems.

Inactive Publication Date: 2009-01-28
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Britain, Canada, Japan and other countries also have some hot-mix and cold-paved asphalt mixture products, but most of them have unknown formulas and have different defects in performance.

Method used

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  • Asphalt mixture for rapid repair of hot-mix-cold-laid pavement
  • Asphalt mixture for rapid repair of hot-mix-cold-laid pavement
  • Asphalt mixture for rapid repair of hot-mix-cold-laid pavement

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0057] Increase petroleum resin in the liquid asphalt of embodiment 1 and improve asphalt performance

[0058] In PG-70SBS modified bitumen (purchased from Zhenjiang Koshi Asphalt Products Co., Ltd.), the petroleum resin (purchased from Landun Chemical Co., Ltd. Co., Ltd.), test the penetration, softening point and ductility of asphalt before and after mixing (perform according to the current "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTJ052-2000)), and test the performance of asphalt.

[0059]

[0060] It can be seen from the table that after adding 2% petroleum resin, the performance of asphalt has been significantly improved.

Embodiment 2-6

[0061] Example 2-6 Liquid asphalt adhesion test

[0062] Based on the weight of modified asphalt, adopt the following weight percentage content formula to configure liquid asphalt (percentages are all weight percentages based on the weight of modified asphalt):

[0063]

[0064] Anti-stripping agent: TJ066 asphalt anti-stripping agent produced by Shanghai Tonglu Material Technology Co., Ltd.

[0065] Select aggregates and mineral powders that meet the technical requirements of the "Code for Design of Asphalt Concrete Pavements at Civil Airports" (MH 5010-1999).

[0066] The coarse aggregate is basalt, the fine aggregate is limestone, and the aggregate gradation is as follows:

[0067]

[0068] When preparing, first mix the appropriate amount of coarse and fine aggregates evenly and heat to 110-120°C; then heat PG-70SBS modified asphalt to 150°C, then add the weighed diluent, anti-stripping agent, petroleum resin, and stir for 15 Make liquid asphalt after ~20min, accura...

Embodiment 7

[0070] The selection experiment of embodiment 7 mineral powder consumption

[0071] The liquid asphalt formula of embodiment 6 is selected, and aggregates and mineral powders meeting the technical requirements of "Code for Design of Asphalt Concrete Pavements of Civil Airports" (MH5010-1999) are selected.

[0072] The coarse aggregate is basalt, the fine aggregate is limestone, and the gradation is as follows:

[0073]

[0074] Adopt the method for embodiment 6 to make liquid asphalt, then carry out the mixing of mixture:

[0075] (1) Add an appropriate amount of coarse aggregate and fine aggregate into a mixing tank at 110-120°C and heat and stir evenly.

[0076] (2) Weigh 6%, 10%, and 15% mineral powder of aggregate total amount respectively.

[0077] (3) According to the different amount of mineral powder, the correspondingly weighed liquid asphalt (admixture added) with an asphalt ratio of 5.0% is heated to 90-100°C, and then added to the mixing tank and aggregated us...

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Abstract

The invention relates to a road restoration asphalt mixture, and discloses a hot-mixing cold-paving road restoration asphalt mixture which comprises modified asphalt, additives and aggregates, wherein, the additives include a diluent, petroleum resin and an anti-stripping agent, the aggregates include coarse aggregate, fine aggregate and mineral powder. While preparing liquid asphalt, using the weight of the modified asphalt as reference, the weight proportion of the diluent is 14 percent to 22 percent, the weight proportion of the petroleum resin is 1.8 to 2.2 percent and the weight proportion of the anti-stripping agent is 0.4 to 0.6 percent. The asphalt mixture of the invention has strong comprehensiveness, performs excellently in poriness, compactibility, initial strength, workability, the strength of formed mixture, anti-water damage property and storage property, can be mixed easily and operated conveniently and is suitable for practical application and generalization.

Description

technical field [0001] The invention relates to a pavement repair asphalt mixture, in particular to a hot-mix cold pavement repair asphalt mixture. Background technique [0002] The pavement is the most important infrastructure in the airport flight area. It undertakes important tasks such as aircraft takeoff and landing, taxiing and parking, and is the basic platform for the full play of the airport's functions. However, due to the repeated effects of load factors and environmental factors, the pavement structure will gradually be damaged during use, such as various fractures of the cement concrete pavement, broken slabs, broken joints, damaged joint fillers, potholes, Repair damage, etc., loose asphalt concrete pavement, cracks, wheel tracks, potholes, subsidence, etc. Some damages to the airport pavement mainly affect the service performance of the pavement, while some damages directly pose a threat to the flight safety of the aircraft. [0003] However, judging from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00E01C7/20C08L57/02
Inventor 凌建明
Owner TONGJI UNIV
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