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Warm mix asphalt mixture and preparation method thereof

A technology for warm mix asphalt and mixture, applied in the direction of climate change adaptation, etc., can solve the problems of high cost and high energy consumption of the preparation process, and achieve the effects of simple production process, avoidance of road rutting, and great economic and social benefits.

Active Publication Date: 2019-04-26
内蒙古高速公路集团有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost of its preparation process is still high, the energy consumption is relatively large, and it cannot really achieve good performance of the mixture, and at the same time reduce the cost of preparation and use

Method used

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  • Warm mix asphalt mixture and preparation method thereof
  • Warm mix asphalt mixture and preparation method thereof
  • Warm mix asphalt mixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055]Example 1 A warm asphalt modified mixture and its preparation

[0056] The warm-mix asphalt mixture in this example is prepared from the following components in parts by weight: 88 parts of mineral material, 10 parts of warm-mix asphalt and 2 parts of fiber. Specifically, the modified warm-mix asphalt includes the following components: 66 parts of base asphalt, 10 parts of rubber cracking oil, 8 parts of plastic cracking wax, 7 parts of alkane oil, 4 parts of polymer, 4 parts of fatty acid and 1 part of other additives . The polymer is a 1:1 mixture of polyethylene and ethylene-vinyl acetate copolymer. The additive is aromatic hydrocarbon organic solvent benzene. The fibers are polypropylene fibers with a length of ≤5mm.

[0057] Preparation:

[0058] (1) Prepare modified warm-mix asphalt and heat it to 110°C. The preparation process is as follows:

[0059] ①Heat the base asphalt to a molten state, add rubber cracking oil and plastic cracking wax and mix at 150°C fo...

Embodiment 2

[0086] Example 2 A warm asphalt modified mixture and its preparation

[0087] The warm-mix asphalt mixture in this example is prepared from the following components in parts by weight: 90 parts of mineral material, 8.5 parts of warm-mix asphalt and 1.5 parts of fiber. Specifically, the modified warm-mix asphalt includes the following components: 66 parts of base asphalt, 10 parts of rubber cracking oil, 8 parts of plastic cracking wax, 7 parts of alkane oil, 4 parts of polymer, 4 parts of fatty acid and 1 part of other additives . The polymer is a mixture of ethylene-octene copolymers. The additive is an aromatic hydrocarbon organic solvent xylene. The fibers are lignin fibers, and the length is ≤5mm.

[0088] Preparation:

[0089] (1) Prepare modified warm-mix asphalt and heat it to 105°C. The preparation process is as follows:

[0090] ①Heat the base asphalt to a molten state, add rubber cracking oil and plastic cracking wax and mix at 150°C for 20 minutes to obtain mix...

Embodiment 3

[0117] Example 3 A warm asphalt modified mixture and its preparation

[0118] The warm-mix asphalt mixture in this example is prepared from the following components in parts by weight: 93 parts of mineral material, 6 parts of warm-mix asphalt and 1 part of fiber. Specifically, the modified warm-mix asphalt includes the following components: 66 parts of base asphalt, 10 parts of rubber cracking oil, 8 parts of plastic cracking wax, 7 parts of alkane oil, 4 parts of polymer, 4 parts of fatty acid and 1 part of other additives . The polymer is a 1:1:1 mixture of polypropylene, ethylene-vinyl acetate copolymer and ethylene-octene copolymer. The additive is aromatic hydrocarbon organic solvent toluene. The fiber is polyester fiber, and the length is ≤5mm.

[0119] Preparation:

[0120] (1) Prepare modified warm mix asphalt and heat it to 125°C, wherein the preparation process is as follows:

[0121] ①Heat the base asphalt to a molten state, add rubber cracking oil and plastic ...

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Abstract

The invention discloses a preparation technology of a warm mix asphalt mixture. The warm mix asphalt mixture comprises 88-93 parts of mineral aggregate, 6-10 parts of modified warm mix asphalt and 1-2parts of fibers, wherein the modified warm mix asphalt comprises the following ingredients in parts by weight: 66-76 parts of matrix asphalt, 7.5-10 parts of rubber cracking oil, 6-8 parts of plasticcracking wax, 6-7 parts of alkene oil, 2-4 parts of a polymer, 2-4 parts of fatty acid and 0.5-1 part of an additive. The preparation technology comprises the steps of feeding the mineral aggregate heated to 120-140 DEG C into a blending cylinder, adding heated asphalt at 105-125 DEG C and a warm mix asphalt modifier, performing stirring 2-4 min, feeding the fibers, and performing blending for 0.5-1 min to form the warm mix asphalt mixture. The performance, such as water damage resistance, rut resistance and fatigue resistance, of the warm mix asphalt mixture are improved; when the warm mix asphalt mixture is applied to road construction, a service life of a road is effectively prolonged; and the preparation technology is simple and low in cost, has great economic and social benefits andmeets the characteristics of green ecology and sustainable development.

Description

technical field [0001] The invention belongs to the technical field of road engineering construction, and in particular relates to a warm asphalt mixture and a preparation method thereof. Background technique [0002] At present, my country's road engineering construction is in a period of rapid development, and asphalt pavement occupies a large proportion of road pavement types due to its good road performance. There are two types of asphalt mixture widely used in asphalt pavement construction, one is Hot Mix Asphalt (HMA) and the other is Cold Mix Asphalt (CMA). Hot mix asphalt mixture is the most widely used pavement material in highway construction at home and abroad. Its biggest disadvantage is that the mixing, paving and rolling of the mixture require high temperature, which not only consumes a lot of energy, but also Moreover, a large amount of toxic gas and dust will be emitted during the construction process, which will cause immeasurable damage to the surrounding ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B24/00C04B24/36C04B24/2611C04B24/2623C04B24/085C04B16/0633C04B18/12C04B14/06C04B16/0675Y02A30/30
Inventor 程国义付塔文太刘伟正姜正义王建平梁超马骏王新宽闫龙武皓杰程思奇姚嘉
Owner 内蒙古高速公路集团有限责任公司
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