Construction process of rubber powder modified asphalt pavement

A technology of modified asphalt and construction technology, applied in the field of modified asphalt, can solve problems such as incapable of high-quality application, and achieve the effects of promoting sustainable development, saving asphalt resources, and reducing maintenance costs

Active Publication Date: 2018-06-29
中铁十八局集团第五工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Nowadays, although there have been many researches on rubber powder modified asphalt technology, there are still few reports on the large-scale application of rubber powder modified asphalt on expressways. There are still many defects in the construction technology applied to large-area expressways, and it cannot be applied to the construction of large-area expressways with high quality. After all, expressways require high performance requirements such as durability and safety.

Method used

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  • Construction process of rubber powder modified asphalt pavement
  • Construction process of rubber powder modified asphalt pavement
  • Construction process of rubber powder modified asphalt pavement

Examples

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Effect test

preparation example Construction

[0037] Step 1, the preparation of rubber powder modified asphalt mixture, including preparation of rubber powder modified asphalt, selection and processing of coarse aggregate and fine aggregate, mixture production and mixing, the specific process is as follows:

[0038] 1) Preparation of rubber powder modified asphalt: drying the rubber powder with a particle size of 40-60 mesh at a drying temperature of 105-115°C; dehydrating the base asphalt for later use; heating the dehydrated base asphalt to 180-190°C ;

[0039] Add the above-mentioned dried rubber powder to the base asphalt process according to the mass percentage, and add it while stirring with a screw agitator to prevent splashing and hurting people during the mixing process; use a mixer to stir, and the stirring speed is from slow to fast , start stirring at 260-300r / min, increase the stirring speed to 1000r / min within 20 minutes, and finally stabilize at 1000r / min and stir for 10-15min. liquid.

[0040] Pump the m...

Embodiment 1

[0123] The preparation of rubber powder modified asphalt in the present invention comprises the following steps:

[0124] 1) Processing of raw materials: drying the rubber powder at a temperature of 105°C; dehydrating the base asphalt for later use;

[0125] 2) Miscibility reaction: heat the dehydrated base asphalt in step 1) to 180°C, then add the dried rubber powder in step 1) into the base asphalt, stir and swell for 42 minutes to obtain a mixed solution; mix the rubber powder When adding to the base asphalt, it must be added while stirring to prevent splashing and hurting people during the stirring process; when starting the mixer to stir, the stirring speed should be slow to fast, starting from 260-300r / min and stirring within 20 minutes The speed was increased to 1000r / min, and finally stabilized at 1000r / min and stirred for 10-15min, and the stirring temperature was controlled at 190°C to 210°C.

[0126] 3) Finished product: pump the mixed liquid in step 2) into the co...

Embodiment 2

[0129] The preparation of rubber powder modified asphalt in the present invention comprises the following steps:

[0130] 1) Processing raw materials: drying the rubber powder at a temperature of 115°C; dehydrating the base asphalt for later use;

[0131] 2) Miscibility reaction: heat the dehydrated base asphalt in step 1) to 185°C, then add the dried rubber powder in step 1) into the base asphalt, stir and swell for 45 minutes to obtain a mixed solution; mix the rubber powder When adding to the base asphalt, it must be added while stirring to prevent splashing and hurting people during the stirring process; when starting the mixer to stir, the stirring speed should be slow to fast, starting from 260-300r / min and stirring within 20 minutes The speed was increased to 1000r / min, and finally stabilized at 1000r / min and stirred for 10-15min, and the stirring temperature was controlled at 190°C to 210°C.

[0132] 3) Finished product: pump the mixed liquid in step 2) into the collo...

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Abstract

The invention discloses a construction process of a rubber powder modified asphalt pavement. The process comprises steps as follows: quality control of raw materials, production and mixing of a rubberpowder modified asphalt mixture, transportation, paving, rolling and joint treatment. The rubber powder modified asphalt is prepared from waste tire rubber powder and is applied to highway construction, so that the quality of ordinary asphalt can be effectively improved, the pavement use performance can be improved, the engineering construction cost can be reduced, and the project investment is saved. The rubber powder modified asphalt mixture is designed on the basis of a GTM design method, technical advantages of materials can be fully played while the use amount of asphalt is reduced, thepavement performance can be notably improved, and the later maintenance cost can be reduced. In combination with the construction characteristic of the materials and in dependence on solid engineering, the proper construction process and quality control key points for the rubber powder modified asphalt mixture are proposed, and referential experience can be provided for future pavement construction of the rubber powder modified asphalt pavement.

Description

technical field [0001] The invention relates to the field of modified asphalt, in particular to a construction technique for rubber powder modified asphalt pavement suitable for large-area expressway construction. Background technique [0002] With the development of the automobile industry and the rapid growth of social car ownership, the output of waste rubber in my country has increased sharply in recent years. At present, there are two main methods of recycling and comprehensive utilization of rubber: incineration to generate heat and production of recycled rubber. However, for burning rubber, it will cause secondary pollution to the air during the burning process. Considering the need to protect the environment, the treatment methods for this waste rubber have been gradually reduced; in addition, for the production of recycled rubber, due to the poor quality of the produced recycled rubber, The production process has high pollution and high energy consumption, and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/10C04B26/26
CPCC04B26/26C04B2111/0075E01C19/1054C04B14/02C04B14/06C04B18/12C04B18/141C04B24/00C04B24/001
Inventor 李晓林周晓辉王海军郭金柱张弛
Owner 中铁十八局集团第五工程有限公司
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