A kind of asphalt mixture for test track and asphalt concrete pavement of test track

A technology of asphalt concrete and asphalt mixture, which is applied to cohesive pavement paved on site, roads, roads, etc. It can solve the problems of poor vertical compaction effect of traction roller on road surface, influence of asphalt pavement shear performance, asphalt pavement material and There are very few structural studies and other issues to achieve the effect of preventing downward flow, reliable test site, and uniform layout

Active Publication Date: 2018-02-06
GUANGZHOU MUNICIPAL ENG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the construction point of view, due to the influence of the superelevation of the curve, the vertical compaction effect of the traction roller on the road surface is poor, which will affect the shear performance of the asphalt pavement
[0003] At present, the research on pavement structure and materials by research institutes at home and abroad is mainly concentrated on expressways. Usually, expressways have relatively high linear design standards, and generally there is no problem of large superelevation curves. The research on curved asphalt pavement is mainly Focusing on construction technology, safety, etc., there are very few studies on the material and structure of asphalt pavement on the steep slope of the high-speed ring road in the proving ground

Method used

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  • A kind of asphalt mixture for test track and asphalt concrete pavement of test track
  • A kind of asphalt mixture for test track and asphalt concrete pavement of test track
  • A kind of asphalt mixture for test track and asphalt concrete pavement of test track

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An asphalt mixture for a test track, which comprises the following components by weight: 60.7% of gravel, 28.7% of sand material and 10.6% of mineral powder.

[0028] Mineral powder is a mixture of limestone mineral powder and cement, the weight ratio of limestone mineral powder and cement is 9:1, and all the mineral powder passes through a 0.075mm square hole sieve; the sand material is a mixture of river sand machine and sand making machine, river sand and mechanism The weight ratio of sand is 1:1, and all sand materials pass through a 1.18mm square hole sieve; the gravel is a mixture of basalt and diabase that all pass through a 16mm square hole sieve after mechanical crushing.

[0029] The synthesis gradation of the asphalt mixture in this embodiment is: the sieve size of the square hole sieve is 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, 0.075mm When the pass rate corresponding to each square hole sieve is 100%, 99%, 84.7%, 66.1%, 51.7%, 39....

Embodiment 2

[0031] An asphalt mixture for a test track, which comprises the following components by weight: 61.1% of gravel, 28.6% of sand material and 10.3% of mineral powder.

[0032] Mineral powder is a mixture of limestone mineral powder, slaked lime and cement. The weight ratio of limestone mineral powder, slaked lime and cement is 8:1:1. All the mineral powder passes through a 0.075mm square hole sieve; the sand material is a mixture of river sand and machine-made sand , The weight ratio of river sand to machine-made sand is 1.2:1, and all sand materials pass through a 1.18mm square hole sieve; gravel is a mixture of limestone and granite that passes through a 19mm square hole sieve after mechanical crushing.

[0033] The synthesis gradation of the asphalt mixture in this embodiment is: the sieve size of the square hole sieve is 19mm, 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, 0.15mm, When the thickness is 0.075mm, the passing rate corresponding to each square hole s...

Embodiment 3

[0035] An asphalt mixture for a test track, which comprises the following components by weight: 60.4% of gravel, 29.1% of sand material and 10.5% of mineral powder.

[0036]Mineral powder is slaked lime, all of which pass through a 0.075mm square hole sieve; the sand material is a mixture of river sand and machine-made sand, the weight ratio of river sand and machine-made sand is 1.5:1, and all sand materials pass through a 1.18mm square hole sieve; the crushed stone is Basalt that has passed through a 26.5mm square hole sieve after mechanical crushing.

[0037] The synthesis gradation of the asphalt mixture in this embodiment is: the sieve size of the square hole sieve is 26.5mm, 19mm, 16mm, 13.2mm, 9.5mm, 4.75mm, 2.36mm, 1.18mm, 0.6mm, 0.3mm, When 0.15mm and 0.075mm, the passing rate corresponding to each square hole sieve is 100%, 98.1%, 95.7%, 93.9%, 81.6%, 67.7%, 52.4%, 39.6%, 25.2%, 17.7%, 13.8% , 10.5%, its ore grading curve is shown in image 3 .

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PUM

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Abstract

The invention provides an asphalt mixture used for skid pads. The asphalt mixture comprises 50-74wt% of broken stones, 14-42wt% of sands and 8-12wt% of mineral powder. The invention also provides a skid pad asphalt concentrate pavement. A bottom layer, a base layer, a middle layer and a surface layer are sequentially paved on foundation, the bottom layer is AC-20(H) asphalt concrete with the thickness of 5-7cm, the base layer is AC-16(H) asphalt concrete with the thickness of 3-5cm, the middle layer is AC-13(H) asphalt concrete with the thickness of 3-5cm, and the surface layer is AC-13(H) asphalt concrete with the thickness of 3-5cm; and asphalt concrete is prepared through uniformly mixing asphalt with the asphalt mixture used for skid pads, the asphalt-aggregate ratio of the AC-13(H) asphalt concrete is 5.6-6.2%, the asphalt-aggregate ratio of the AC-16(H) asphalt concrete is 5.5-5.9%, and the asphalt-aggregate ratio of the AC-20(H) asphalt concrete is 5.4-5.8%. The concrete pavement can comprehensively meet use requirements of high speed circuits, curves and steel slop surfaces in the skid pads.

Description

technical field [0001] The invention relates to the technical field of pavement construction, in particular to an asphalt mixture which can be used for paving the pavement of a proving ground, and an asphalt concrete pavement which meets the pavement requirements of the proving ground and paved by using the asphalt mixture. Background technique [0002] The flat curve of the high-speed ring road of the test track is a McConnell curve, the curve shape of the cross section is designed as a cubic parabola, the maximum inclination angle of the curved surface design is 47.08 degrees, and the maximum height difference can reach 7.6 meters. From bottom to top, it is divided into low-speed lane, Medium-speed lanes and high-speed lanes, among which the design speed of high-speed lanes is 180km / h. The construction of this project is difficult and the process is complicated. Vehicles on the proving ground usually do not take braking measures when driving to the curve of the high-speed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01C7/32C04B18/02C04B26/26C04B20/00
CPCC04B18/021C04B20/0076C04B26/26E01C7/32
Inventor 麦宇博陈舜明金年喜杜莘赖见吾陈忠章向建宇颜剑雄郭小东苏伟峰张臻成林军转蔡国华张京锋林俊翔潘冬
Owner GUANGZHOU MUNICIPAL ENG GROUP
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