Asphalt mixture capable of suppressing reflection cracks in road surface, and preparation method and application of asphalt mixture

A technology of asphalt mixture and reflective cracks, applied in the field of building materials, can solve the problems of restricting urban road reconstruction projects, increasing the cost of reconstruction projects, etc., achieving good economic and environmental benefits and suppressing reflective cracks.

Active Publication Date: 2014-04-02
SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to regional differences, higher purchase prices of aggregates and 90# heavy traffic asphalt increase the cost of "white plus black" renovation projects, which restricts the progress of urban road renovation projects

Method used

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  • Asphalt mixture capable of suppressing reflection cracks in road surface, and preparation method and application of asphalt mixture
  • Asphalt mixture capable of suppressing reflection cracks in road surface, and preparation method and application of asphalt mixture

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This example provides an asphalt mixture for suppressing reflective cracks on the road surface. The raw materials used are as follows:

[0031] Aggregate: Coarse aggregate and fine aggregate are limestone, the nominal maximum particle size is 19mm, coarse aggregate and fine aggregate account for 76.2% and 12.5% ​​of the mass of the mixture respectively;

[0032] Filler: limestone powder, accounting for 4.2% of the mass of the mixture;

[0033] Fiber stabilizer: lignin fiber, with an average length of about 4mm, accounting for 0.3% of the mass of the mixture;

[0034] The ore grading is:

[0035] Sieve hole (mm)

26.5

19

16

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Passing rate(%)

100.0

95.1

81.6

65.5

45.1

19.7

14.6

11.4

8.9

7.5

6.7

5.9

[0036] High-viscosity asphalt binder: accounting for 6.5% of the mass of the mixture, modified from Tepco 70# asph...

Embodiment 2

[0042] Aggregate: Coarse aggregate and fine aggregate are limestone, the nominal maximum particle size is 19mm, coarse aggregate and fine aggregate account for 72.9% and 14.9% of the mass of the mixture respectively;

[0043] Filler: limestone powder, accounting for 5.1% of the mass of the mixture;

[0044] Fiber stabilizer: lignin fiber, with an average length of about 5mm, accounting for 0.4% of the mass of the mixture;

[0045] The ore grading is:

[0046] Sieve hole (mm)

26.5

19

16

13.2

9.5

4.75

2.36

1.18

0.6

0.3

0.15

0.075

Passing rate(%)

100.0

95.2

82.1

66.4

46.1

21.6

16.1

12.4

9.4

7.9

6.9

6.0

[0047] High-viscosity asphalt binder: accounting for 6.7% of the mass of the mixture, composed of 77.1% of Korean SK70# asphalt, 14.9% of 60-80 mesh waste rubber powder, 2‰ of industrial grade sulfur, 3.8% of warm mixing agent and high-viscosity asphalt modifie...

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Abstract

The invention relates to an asphalt mixture capable of suppressing reflection cracks in a road surface, and a preparation method and application of the asphalt mixture. The mixture comprises aggregates, a filler, a fiber stabilizing agent and a high-viscosity asphalt binding material, wherein the aggregates comprise coarse aggregates and fine aggregates; the nominal maximum particle size of the aggregates is 19 mm; limestone is adopted for both the coarse and fine aggregates; the mixing amount of the high-viscosity asphalt binding material is 5.5 to 6.9 percent based on the mass of the asphalt mixture; the high-viscosity asphalt binding material consists of 12 to 19 weight percent of 60 to 80-mesh rubber powder, 0.1 to 0.3 weight percent of a cross-linking agent, 4.0 to 8.0 weight percent of a modifying agent, 3.8 to 7.6 weight percent of a viscosity reducer and the balance of 70# matrix asphalt; the asphalt mixer is a gap semi-open gradation asphalt mixture, and has porosity of 8 to 12 percent. The reflection cracks in the road surface can be effectively suppressed, and the asphalt mixture is low in preparation cost, and has good economic benefits and environmental benefits.

Description

technical field [0001] The invention belongs to the technical field of building materials used in road engineering, and in particular relates to an asphalt mixture for suppressing reflective cracks on road surfaces, a preparation method and application thereof. Background technique [0002] With the development of society, urban roads have higher requirements for functionality and comfort while satisfying traffic travel. The reconstruction of a large number of existing cement concrete pavements has become a difficult point in the development of urban roads. Years of engineering practice experience shows that "white plus black" is an economical and effective engineering transformation method, that is, adding a layer of asphalt mixture to suppress reflection cracks on the original cement road slab. [0003] This layer of asphalt mixture for suppressing reflective cracks is the key to the "white plus black" reconstruction project. Discontinuously graded, high-viscosity asphalt ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 李桥林刘钢赫振华王腾飞李军代陆风云马利志李交袁月邱轶徐韵淳邓国民夏庆宇吴月琴李俊
Owner SHANGHAI PUDONG ROAD & BRIDGE GRP CO LTD
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