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A kind of modified asphalt mixture and preparation method thereof

A technology of modified asphalt and mixture, which is applied in the field of highway engineering, can solve the problems of strengthening the limitations of road surface construction, increasing exhaust gas and dust particles, and unfavorable environmental protection, so as to improve the synergistic effect of compounding, increase the bonding force, and improve The effect of structural strength and compressive properties

Active Publication Date: 2021-09-14
四川志德公路工程有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the asphalt with rubber is very viscous, and the mixture needs to be heated to a very high temperature during the construction process, which brings many problems to the mixing, transportation and rolling of the asphalt mixture, and the construction cost is high, especially in high In places where the transportation distance is long and the ambient temperature is generally low in altitude mountainous areas, the temperature of the asphalt mixture drops too quickly during mixing, transportation, rolling, etc., which increases the limitations of road construction and prolongs the construction period. At the same time, the asphalt and Mineral materials also consume a lot of energy, which increases the generation of waste gas and dust particles in the production and construction process, which is not conducive to environmental protection

Method used

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  • A kind of modified asphalt mixture and preparation method thereof

Examples

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Comparison scheme
Effect test

preparation example 1

[0034] Preheat 15kg of base asphalt to 160°C, add 0.6kg of high-density polyethylene to the base asphalt, keep it at 160°C for 15 minutes, and perform high-speed shearing on the mixture of base asphalt and high-density polyethylene at a shear rate of 4000rpm, the shearing time is 1.5h, and the modified asphalt can be obtained after the shearing is completed.

preparation example 2

[0036] Preheat 10kg of base asphalt to 165°C, add 0.6kg of styrene-butadiene-styrene block copolymer to the base asphalt, and keep it at 170°C for 10 minutes, the base asphalt and styrene-butadiene - The mixture of styrene block copolymers is subjected to high-speed shearing, the shearing speed is 4000 rpm, and the shearing time is 0.8 h. After the shearing is completed, the modified asphalt is obtained.

preparation example 3

[0038] Preheat 10kg of base asphalt to 163°C, add 0.15kg of high-density polyethylene and 0.35kg of ethylene-vinyl acetate copolymer to the base asphalt, and keep it at 165°C for 12min. The mixture of ethylene-styrene block copolymers is subjected to high-speed shearing, the shearing speed is 4000rpm, and the shearing time is 1.2h. After the shearing is completed, the modified asphalt is obtained.

[0039] The bitumen that adopts in above-mentioned each embodiment is No. 90 bitumen.

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Abstract

The invention discloses a modified asphalt mixture and a preparation method thereof. A modified asphalt mixture is made of the following raw materials in parts by weight: 6-15 parts of modified asphalt, 95-120 parts of aggregate, 18-30 parts of filler, 3-7 parts of warm mixing agent and 0.5 to 3 parts of additives. The preparation method is as follows: weighing each material according to the proportion of the formula, preheating the aggregate, mixing it with additives for dry mixing, adding modified asphalt and warm mixing agent, mixing evenly, and then adding fillers and mixing. The modified asphalt mixture prepared by the invention has the advantages of compact structure, strong compression resistance, not easy to crack, and convenient transportation and construction. In addition, the preparation method of the invention has the advantage of low temperature requirement.

Description

technical field [0001] The invention relates to the technical field of highway engineering, in particular to a modified asphalt mixture and a preparation method thereof. Background technique [0002] With the rapid development of road construction in my country, the connection between cities has been strengthened, and cultural exchanges between different regions have also been promoted. Road construction puts forward higher requirements. Asphalt pavement refers to various types of pavement paved with asphalt materials mixed with mineral materials. The asphalt mixture improves the ability of paving aggregates to resist damage to the road surface caused by driving and natural factors, making the road surface smooth and less dusty. Water permeable and durable. The currently commonly used asphalt pavement is various types of pavement formed by paving and rolling asphalt mixture. Stir the resulting mixture well. However, asphalt pavement also has various diseases such as crack...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2201/50C04B24/2611C04B24/2623C04B24/2676C04B18/12C04B14/185C04B18/023C04B14/36C04B14/06C04B2103/60
Inventor 张野张宏斌潘瑜张卫赵斌
Owner 四川志德公路工程有限责任公司