Ultra-thin wearing layer of pavement

A wear layer, ultra-thin technology, applied in the field of asphalt mixture, can solve the problems of insignificant overall, difficult to achieve pertinence, reduced cost, etc., to improve water stability, good stability, and enhance resistance to dynamic water erosion. Effect

Active Publication Date: 2012-06-20
上海砼仁环保技术发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the thin pavement thickness, it will withstand the test of relatively severe traffic, environmental and other factors during use. It is often necessary to use high-performance modified asphalt materials. The cost is lower than the traditional 40mm overlay scheme, but overall it is not significant
Moreover, for preventive maintenance projects, when adding 20mm to 25mm pavement, it is often necessary to overlay the entire section t

Method used

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  • Ultra-thin wearing layer of pavement

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Aggregate: basalt, the maximum nominal particle size is 6.7mm;

[0024] Filler: cement (ordinary Portland cement 42.5); limestone mineral powder; limestone mineral powder: ordinary Portland cement = 1:2;

[0025] The ore grading is:

[0026] Sieve hole(mm)

9.5

6.7

2.36

1.18

0.6

0.075

Passing rate(%)

100

95.5

10.7

8.9

7.3

4.2

[0027] Asphalt binder (high-performance asphalt): base asphalt is I-C type SBS modified asphalt, 40 mesh to 60 mesh waste tire rubber powder is 24% of SBS modified asphalt, and high-performance asphalt accounts for 8.5% of the total mass of the mixture.

[0028] Warm mix agent: DAT warm mix agent, the dosage is 6.0% of high-performance asphalt.

[0029] The void ratio of the mixture was 19.8%.

[0030] The performance indicators of the mixture are:

[0031] project

Embodiment 2

[0033] Aggregate: diabase, the maximum nominal particle size is 6.7mm;

[0034] Filler: cement (ordinary Portland cement 32.5); limestone mineral powder; limestone mineral powder: ordinary Portland cement = 1:3;

[0035] The ore grading is:

[0036] Sieve hole(mm)

9.5

6.7

2.36

1.18

0.6

0.075

Passing rate(%)

100

91.4

14

12.7

8.1

4.3

[0037] Asphalt binder (high-performance asphalt): base asphalt is I-C type SBS modified asphalt, 40 mesh to 60 mesh waste tire rubber powder is 25% of SBS modified asphalt, and high-performance asphalt accounts for 9.0% of the total mass of the mixture.

[0038] Warm mix agent: DAT warm mix agent, its dosage is 5.5% of high-performance asphalt.

[0039] The void ratio of the mixture was 17.5%.

[0040] The performance indicators of the mixture are:

[0041] project

Embodiment 3

[0043] Aggregate: diabase, the maximum nominal particle size is 6.7mm;

[0044] Filler: cement (ordinary Portland cement 42.5); limestone mineral powder; limestone mineral powder: ordinary Portland cement = 2:1;

[0045] The ore grading is:

[0046] Sieve hole(mm)

9.5

6.7

2.36

1.18

0.6

0.075

Passing rate(%)

100

97.8

24.4

18.3

11.7

8.5

[0047] Asphalt binder (high-performance asphalt): base asphalt is I-C type SBS modified asphalt, 60 mesh to 80 mesh waste tire rubber powder is 22% of SBS modified asphalt, and high-performance asphalt accounts for 8.5% of the total mass of the mixture.

[0048] Warm mix agent: DAT warm mix agent, its dosage is 5% of high-performance asphalt.

[0049] The void ratio of the mixture is 4.8%, the VMA of the mineral aggregate is 21.1%, and the asphalt saturation is 77.3%.

[0050] The performance indicators of the mixture are:

[0051] proje...

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Abstract

The invention belongs to the technical field of a building material used in road engineering, and specifically relates to drainage asphalt mixture for an ultra-thin wearing layer. The mixture comprises aggregated material, stuffing, high-performance asphalt and warm mixing additive; the maximal nominal size of the mixture is 6.7mm; the thickness of a pavement layer is 10-20mm; the aggregated material is basalt or dolerite; the used stuffing is mixture of limestone powder and common silicate cement, and the used high-performance asphalt is prepared from general modified asphalt by adding waste tire rubber powder which is 20-28% of weight of the asphalt and modifying. An ultra-thin finishing coat and low-temperature construction are realized by the asphalt mixture by adding the warm mixing additive; the ultra-thin wearing layer has the advantages of low construction cost, convenience in construction and the like, and is suitable for building of an asphalt concrete pavement and function-improving works of the pavement.

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 used for ultra-thin wearing layers. Background technique [0002] Previous pavement structures mainly include 150-300mm cement concrete pavement paved with penetration or surface treatment technology, 40-60mm asphalt concrete pavement, etc. These pavements generally have poor performance, high cost or high maintenance frequency, and maintenance costs advanced questions. At present, the use of an ultra-thin wear layer with a pavement thickness of 20mm to 25mm can solve the problems of slight cracks, looseness, slight rutting, poor surface oil, aging, and attenuation of anti-skid performance on the pavement. It can be used as an anti-skid layer for new pavements, and it is one of the more effective preventive maintenance techniques at present. Due to the thin pavement thickness, it will withstand the test of relat...

Claims

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Application Information

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IPC IPC(8): E01C7/35E01C7/26C04B26/26
Inventor 钱卫胜
Owner 上海砼仁环保技术发展有限公司
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