Asphalt cold mixing repairing composite material and preparation method thereof

A composite material and asphalt technology, applied in the field of asphalt cold mix repairing composite materials, can solve the problems of shortened service life, high temperature sensitivity, low pavement strength, etc., and achieves prevention of secondary damage, excellent road performance, and bonding performance. good effect

Active Publication Date: 2022-05-06
河南金欧特实业集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the hot-mix asphalt mixture is used to repair the road surface, its construction is greatly affected by the climatic conditions. In the northern region or in the cold season, it is not easy to compact due to the low temperature, and the effective construction season for asphalt pavement repair is severely shortened.
In addition, hot mix asphalt mixture also has defects such as high cost, high energy consumption, and large pollution.
However, although the cold-mix asphalt mixture widely used in the market in recent years can achieve mixing construction at room temperature to a certain extent and reduce energy consumption, it generally has problems such as low initial strength, slow strength growth, and high temperature sensitivity.
When repairing the pavement, because the solvent in the cold-patch asphalt mixture is completely volatilized before reaching a higher strength, the initial strength of the cold-patch asphalt mixture is low, which leads to a long time for its strength growth, and it is difficult to meet the high strength requirements. High-grade road surface is required to be opened to traffic as soon as possible; the strength of the repaired road surface is low, and the ability to resist water damage is poor, thus reducing the traffic capacity of the repaired road and shortening the service life

Method used

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  • Asphalt cold mixing repairing composite material and preparation method thereof
  • Asphalt cold mixing repairing composite material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Asphalt cold-mix repair composite material, composed of part A and part B with a mass ratio of 6:100; part A includes 10 parts of siloxy-terminated polyether resin, 0.5 part of 3-glycidoxypropylmethyldiethyl Calcium carbonate modified by oxysilane, 100 parts of asphalt modified polysulfide rubber, 0.2 part of manganese dioxide, 10 parts of dibutyl phthalate, 15 parts of aromatic oil, 1.5 parts of composite catalyst, the composite catalyst is attached Silica of 12%wt organotin and 10wt% organotitanium; Part B is a mixed aggregate obtained by grinding limestone and andesite with a mass ratio of 2:1, and the mixed aggregate includes a particle size of 11-22mm Coarse aggregate, medium aggregate with a particle size of 6-11 mm and fine aggregate with a particle size of 0-6 mm; the mass ratio of the coarse aggregate, coarse aggregate and fine aggregate is 9:6:10.

[0026] The preparation method is as follows: (1) prepare bitumen-modified polysulfide rubber and calcium carbona...

Embodiment 2

[0028]The difference from Example 1 is that the asphalt cold-mix repair composite material is composed of part A and part B with a mass ratio of 4.5:100; and the proportion of part A is different, including 18 parts of silicone-terminated polyether resin, 6 parts 3-Glycidoxypropylmethyldiethoxysilane modified calcium carbonate, 100 parts of bitumen modified polysulfide rubber, 0.8 parts of manganese dioxide, 15 parts of dibutyl phthalate, 15 parts of aromatic hydrocarbon oil, 1.8 parts of composite catalyst; wherein, the bitumen-modified polysulfide rubber is prepared by the following method: heating base asphalt to 150-160°C, adding polysulfide rubber, keeping the temperature at 170-180°C, and dispersing at high speed for 30-40min, After cooling down, add γ-aminopropyl triethoxysilane, develop and stir at 150°C for 30 minutes, wherein, the amount of base asphalt added is 18wt% of the polysulfide rubber, and the γ-aminopropyl triethoxy The blending amount of base silane is 8wt...

Embodiment 3

[0030] The difference from Example 1 is that the asphalt cold-mix repair composite material is composed of part A and part B with a mass ratio of 7:100; and the proportion of part A is different, including 25 parts of siloxy polyether resin, 6 parts 3-Glycidoxypropylmethyldiethoxysilane modified calcium carbonate, 100 parts of bitumen modified polysulfide rubber, 0.6 parts of manganese dioxide, 15 parts of dibutyl phthalate, 12 parts of aromatic hydrocarbon oil, 2.1 parts of composite catalyst; wherein, the bitumen-modified polysulfide rubber is prepared by the following method: heating base asphalt to 150-160°C, adding polysulfide rubber, keeping the temperature at 170-180°C, and dispersing at high speed for 30-40min, After cooling down, add γ-aminopropyl triethoxysilane, and develop and stir at 150°C for 30 minutes to prepare, wherein, the blending amount of base asphalt is 10wt% of polysulfide rubber, and the γ-aminopropyl triethoxy The blending amount of base silane is 5wt...

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Abstract

The invention relates to the technical field of pavement repairing, in particular to an asphalt cold-mixing repairing composite material. The composite material is composed of a part A and a part B according to the mass ratio of (4.5-7): 100, the part A comprises siloxy-terminated polyether resin, 3-epoxy propoxy propyl methyl diethoxy silane modified calcium carbonate, asphalt modified polysulfide rubber, a curing agent, a plasticizer, aromatic hydrocarbon oil and a composite catalyst, and the part B is mixed aggregate with the base number larger than 0.7. Compared with the prior art, the asphalt cold-mixing repair composite material provided by the invention is environment-friendly in construction process; the maintenance time is short, the maintenance temperature can tolerate the low temperature of 0-10 DEG C, the high-temperature maintenance effect in summer is better, traffic can be quickly opened only by maintenance for one day, the bonding performance of the repairing material and the original pavement is good, the pavement performance is excellent, and the repairing material is suitable for repairing various different types of road surface layers in any weather and environment; and the method has good social and economic benefits and wide engineering application prospects.

Description

technical field [0001] The invention relates to the technical field of pavement repair, in particular to an asphalt cold-mix repair composite material. Background technique [0002] Asphalt pavement has become the most common pavement form in the world due to its advantages of comfortable driving, low noise and easy maintenance and repair. However, after opening to traffic, due to traffic loads, climate conditions, and deficiencies in the design and construction process, cracks, potholes, ruts and other road surface defects will appear on the asphalt pavement, which will seriously affect the driving comfort and even cause the structural bearing capacity to gradually decrease. problem of loss. [0003] At present, hot mix asphalt mixture is the mainstream material for repairing damaged asphalt pavement. However, when hot-mix asphalt mixture is used to repair pavement, its construction is greatly affected by climatic conditions. In northern regions or cold seasons, it is not...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/50C04B24/42C04B14/28C04B24/08C04B24/425C04B14/06C04B22/06C04B24/045
Inventor 郭怀亮王增强董光彬荆靖谭飞付强刘长红王海赞
Owner 河南金欧特实业集团股份有限公司
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