Synthetic fiber modified pavement asphalt and its preparing process

A technology of synthetic fiber and road asphalt, which is applied in the field of road asphalt material and its preparation, synthetic fiber modified road asphalt and its preparation field, can solve the problem of uneven distribution of fibers, can not fundamentally solve the problem of fiber ball formation, low dispersion efficiency, etc. problems, to achieve the effects of low equipment investment and operating costs, improvement of oxidative degradation phenomenon, and simple preparation process

CN1966581AInactive Publication Date: 2007-05-23SUZHOU UNIV +1
1 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2007-05-23
Estimated Expiration
Not applicable · inactive patent
Patent Text Reader

Abstract

The invention disclosed a kind of asphalt material that is used in paving the highway as well as its preparing method, especially a kind of synthon reshaped asphalt as well as its preparing method which belongs to the high polymer material domain. The ingredient of the asphalt includes 30-98.95wt% of synthon, 0.5-60wt% of way asphalt, 0.05-3wt% anti-oxidant and 0.5-30wt% of filling. After previously mix the materials, charge them into the high speed shearing device, shearing the material at 80-220 DEG C for 3-120min to prepare the product. Because of the high speed shearing device and the add of fillings such as talcum powder, during the melting, shearing, leveling, mixing and dispersing process of the materials, the invention has overcome the problem of tangling of the synthon; because of the antioxidant, the comprehensive qualities of the asphalt concrete has been substantially improved. The preparing procedure is simple, practical, and needs low investment and operating cost which is easier to be extended and universalized.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a road asphalt material for laying roads and a preparation method thereof, in particular to a synthetic fiber modified road asphalt and a preparation method thereof, belonging to the technical field of polymer materials. Background technique

[0002] Asphalt pavement occupies a very important position in the pavement structure of highways in our country, and about 90% of expressways use asphalt pavement. The most notable advantage of asphalt as a paving material is that it has good adhesion, but its disadvantages are that it is easy to deform and flow at high temperature, easy to crack at low temperature and low tensile strength. With the development of the synthetic fiber industry, research in recent years has found that adding synthetic fiber materials to asphalt can improve its thermal stability, low temperature crack resistance, durability and tensile strength. However, since synthetic fiber materia...

Examples

Embodiment 1

[0019] 85% petroleum asphalt, 5% road polyester fiber, 3% antioxidant are alkylphenol tert-butyl cresol, and 7% filler is talcum powder, which is set at 120°C by mass percent. In the double-roll mill, the rotation speed of the front roller is 17.8rpm, the rotation speed of the rear roller is 24rpm, the roller distance is 1mm, and the high-speed shearing time is 30min, and the polyester fiber modified asphalt material is obtained.

[0020] The synthetic fiber modified road asphalt material prepared according to the method described in this example has no entanglement or ball formation in the asphalt after high-shear dispersion.

Embodiment 2

[0022] The mass percentage is 82% of petroleum pitch, 8% of polyacrylonitrile fiber, 2% of antioxidant is hindered amine diaryl secondary amine, 8% of filler is superfine calcium carbonate, pre-mixed by high-speed kneader Disperse, then, add the mixture to the feeder of the twin-screw extruder, control the temperature of each section of the twin-screw extruder, the temperature of the feeding section is from room temperature to 50°C, the temperature of the compression section is 130-140°C, and the metering section is 120-130°C ℃, the melt pressure is 0.2-0.3MPa, the speed of the main machine is 200-300rpm, and the processing time is 10min, the polyester fiber modified asphalt material is obtained.

[0023] In the foregoing embodiments, the synthetic fiber material can be road polyester fiber, nylon, carbon fiber pre-oxidized silk, polyacrylonitrile fiber, carbon fiber; antioxidant is alkylphenol such as tert-butylcresol, dialkylhydroquinone , Alkyl p-aminophenol, or hindered am...