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Preparation method of rubber asphalt mastic crushed stone mixture

A technology for rubberized asphalt and mixture, applied in the field of asphalt mixture preparation, can solve the problems of difficult construction, no road standards or specifications, and high technical requirements, and achieves strong resistance to water damage, small voids, and strong resistance to load deformation. and the effect of high temperature rutting resistance

Inactive Publication Date: 2016-10-26
THE FIRST ENG CO LTD OF CTCE GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

So far, although rubber asphalt construction technology has been researched and used in some places in China, the application of rubber asphalt in the structure of SMA mixture has not been widely used in China, and there are no relevant standards or specifications for this type of road. It can be said that It is a blank field with high technical requirements and difficult construction

Method used

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  • Preparation method of rubber asphalt mastic crushed stone mixture
  • Preparation method of rubber asphalt mastic crushed stone mixture
  • Preparation method of rubber asphalt mastic crushed stone mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A preparation method for rubber asphalt mastic gravel mixture, comprising the following steps:

[0028] (1) Select radial tires or bias tires to remove the bezel part of waste tires, and crush them into 30 mesh rubber powder at room temperature;

[0029] (2) Screen the aggregates used step by step from 0.075-16mm according to the full sieve holes, and use graded aggregates with the following gradation range for the aggregates:

[0030] Mesh size(mm)

16

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Synthetic grading range (%)

100

94

60

28

21

17

13

11

9

8

[0031] (3) Heat the asphalt to 140°C, raise the temperature to 175°C, and the heating rate is 10°C / h, and transport it to the batching tank through the flowmeter, and add rubber powder at the same time, the feeding time is 1min, and the temperature reaches 180°C and starts to stir for 5min. Then be transported to the storage tank for stirrin...

Embodiment 2

[0045] A preparation method for rubber asphalt mastic gravel mixture, comprising the following steps:

[0046] (1) Select radial tires or bias tires to remove the bezel part of waste tires, and crush them into 30 mesh rubber powder at room temperature;

[0047] (2) Screen the aggregates used step by step from 0.075-16mm according to the full sieve holes, and use graded aggregates with the following gradation range for the aggregates:

[0048] Mesh size(mm)

16

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Synthetic grading range (%)

100

94

59

27

21

18

15

13

11

9

[0049] (3) Heat the asphalt to 150°C, raise the temperature to 180°C, and the heating rate is 20°C / h, transport it to the batching tank through the flow meter, and add rubber powder at the same time, the feeding time is 1min, and the temperature reaches 180°C and starts to stir for 5min , and then transported to the storage tank for stirrin...

Embodiment 3

[0064] A preparation method for rubber asphalt mastic gravel mixture, comprising the following steps:

[0065] (1) Select radial tires or bias tires to remove the bezel part of waste tires, and crush them into 30 mesh rubber powder at room temperature;

[0066] (2) Screen the aggregates used step by step from 0.075-16mm according to the full sieve holes, and use graded aggregates with the following gradation range for the aggregates:

[0067] Mesh size(mm)

16

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Synthetic grading range (%)

100

96

61

28

22

20

16

14

12

10

[0068] (3) Heat the asphalt to 145°C, raise the temperature to 180°C, and the heating rate is 15°C / h, and transport it to the batching tank through the flowmeter, and add rubber powder at the same time, the feeding time is 1min, and the temperature reaches 190°C and starts to stir for 5min. Then be transported to the storage tank for stirr...

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Abstract

The invention discloses a preparation method of a rubber asphalt mastic crushed stone mixture. The method comprises the following steps that radial tires or diagonal tires are selected, waste tire mouth ring parts are removed, and the treated tires are smashed into 30-mesh rubber powder at room temperature; applied aggregates are sieved grade by grade according to full meshes from 0.075 mm to 16 mm; asphalt is heated, the rubber powder is added simultaneously, and the mixture is conveyed to a storage tank for stirring and development; graded aggregates, lignocellulose and a high modulus agent are stirred to be uniform, the rubber asphalt is added, mixing is conducted to be uniform, and the rubber asphalt mastic crushed stone mixture is obtained. The binding force of the asphalt and crushed stone can be well improved, and the water sealing performance is good; after the lignocellulose is added, fibers form a net structure in an asphalt mixture, the reinforced effect can be formed, and meanwhile heating expansion of rubber is stable; rubber asphalt mastic and the aggregates have high binding force, and moisture damage resistance of the mixture is very high.

Description

technical field [0001] The invention relates to a method for preparing asphalt mixture, in particular to a method for preparing rubber asphalt mastic macadam mixture. Background technique [0002] At present, my country's highway construction is in the ascendant, the highway mileage is increasing continuously, and the road surface grade is continuously improving. The widely used asphalt pavement requires a large amount of asphalt; with the rapid economic growth and the increase in traffic volume, the number of cars increases year by year. Early diseases such as pits and pits emerge in endlessly, and the actual service life is far lower than the design life. At the same time, the number of discarded old tires is also rising, and the pressure on environmental protection is great. So far, although rubber asphalt construction technology has been researched and used in some places in China, the application of rubber asphalt in the structure of SMA mixture has not been widely used ...

Claims

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Application Information

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IPC IPC(8): C04B26/26
CPCC04B26/26C04B2111/0075C04B24/24C04B18/26C04B2103/0068C04B14/14C04B14/28
Inventor 王时根郭宏坤田荣吴兆兵左小红刘战刚
Owner THE FIRST ENG CO LTD OF CTCE GRP
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