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Open-graded asphalt mixture with small particle size for ultra-thin overlay

A technology of asphalt mixture and small particle size, which can be applied to cohesive pavement, roads, buildings and other directions paved on site. It can solve problems such as loud noise, rutting and looseness, and achieve lower project cost, thinner overlay thickness, The effect of reducing traffic noise

Active Publication Date: 2020-03-17
SHANGHAI MUNICIPAL PLANNING & DESIGN INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The modified emulsified asphalt cold-mix construction technology is adopted for the micro-surface. Although the pavement thickness is 1.0cm, its nominal maximum particle size is 9.5mm. The coarse aggregate does not form an embedded structure, which is noisy, prone to rutting and loose And other issues

Method used

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  • Open-graded asphalt mixture with small particle size for ultra-thin overlay
  • Open-graded asphalt mixture with small particle size for ultra-thin overlay

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The small particle size open-graded asphalt mixture used for ultra-thin overlays in this embodiment includes 85% by weight of aggregates, 7.5% by weight of fillers and 7.5% by weight of POE composite modified asphalt. The aggregate used is basalt produced by Jintan Fulu Stone Rolling Plant (3mm~5mm continuous gradation basalt and 0mm~3mm continuous gradation basalt are mixed at a mass ratio of 78:22); the filler used is Jiangxi Kuntai Mine The mixture of limestone slag powder produced by the powder factory and P.O 42.5 cement produced by Anhui Conch Cement Co., Ltd., the mass ratio is 1:1.

[0028] The gradation of the aggregates used and the fillers used are as follows:

[0029] Mesh size(mm) 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing percentage (%) 100 95 40 25 15 12 12 10

[0030] The POE composite modified bitumen used comprises the following components: No. 50 bitumen (Sinopec Zhenhai Refining and Chemical Co., Ltd.) 100 parts ...

Embodiment 2

[0037] The small particle size open-graded asphalt mixture used for ultra-thin overlays in this embodiment includes 86.5% by weight of aggregates, 8% by weight of fillers and 5.5% by weight of POE composite modified asphalt. The aggregate used is basalt produced by Jintan Fulu Stone Rolling Plant (3mm~5mm continuous gradation basalt and 0mm~3mm continuous gradation basalt are mixed at a mass ratio of 80:20); the filler used is Jiangxi Kuntai Mine The mixture of limestone slag produced by powder factory and P.O42.5 cement produced by Anhui Conch Cement Co., Ltd., the mass ratio is 3:1.

[0038] The gradation of the aggregates used and the fillers used are as follows:

[0039] Mesh size(mm) 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing percentage (%) 100 90 21 11 9 9 9 8

[0040] The POE composite modified bitumen used comprises the following components: 100 parts by weight of No. 30 bitumen (Sinopec Zhenhai Refining and Chemical Co., Ltd.), 8 ...

Embodiment 3

[0047] The small particle size open-graded asphalt mixture used for ultra-thin overlays in this embodiment includes 92.0% by weight of aggregates, 2% by weight of fillers and 6% by weight of POE composite modified asphalt. The aggregate used is diabase produced by Huzhou Jinheng Stone Processing Plant (3mm~5mm continuous gradation diabase and 0mm~3mm continuous gradation diabase are mixed at a mass ratio of 75:25); the filler used is It is a mixture of limestone mineral powder produced by Jiangxi Kuntai Mineral Powder Factory and P.O 42.5 cement produced by Anhui Conch Cement Co., Ltd., with a mass ratio of 2:1.

[0048] The gradation of the aggregates used and the fillers used are as follows:

[0049] Mesh size(mm) 9.5 4.75 2.36 1.18 0.6 0.3 0.15 0.075 Passing percentage (%) 100 99 15 5 5 3 3 2

[0050] The POE composite modified bitumen used comprises the following components: 100 parts by weight of No. 50 bitumen (Sinopec Zhenhai Refining ...

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Abstract

The invention provides a small-particle-size open-graded asphalt mixture for an ultra-thin overlay. The mixture is prepared from 85%-92% by weight of aggregate, 2%-8% by weight of filler and 5.5%-7.5% by weight of polymer modified asphalt, the nominal maximum aggregate size is 4.75 mm and the thickness of a pavement layer is 1.0-1.5 cm; preferably, the aggregate is basalt or diabase, the filler is the mixture of limestone mineral powder and cement in the mass ratio being (1:1)-(3:1), and the polymer modified asphalt is POE composite modified asphalt and has the zero-shear viscosity being 30,000 Pa.s or higher at 60 DEG C and the softening point equal to or higher than 90 DEG C. The small-particle-size open-graded asphalt mixture for ultra-thin overlay can reduce the thickness of a thin overlay, reduce building cost of a project and reduce noise during driving, two levels of hard building stones with the particle size being 3-5 mm or 0-3 mm can be utilized, the environment and resource stress of superfluous corresponding building stones due to large-scale application of SMA (stone mastic asphalt) pavements is reduced, and the small-particle-size open-graded asphalt mixture is ingenious in design, simple and convenient to prepare, low in cost and suitable for large-scale popularization and application.

Description

technical field [0001] The present invention relates to the technical field of road building materials, more specifically, to the technical field of asphalt mixture used for ultra-thin overlays, in particular to a small particle size open-graded asphalt mixture used for ultra-thin overlays. Background technique [0002] At present, my country's roads are generally facing problems such as increasing traffic volume, large-scale development of vehicles, repeated prohibitions on heavy loads and overloading, and serious vehicle channelization traffic. Asphalt pavement is prone to loosening, cracks, and rapid attenuation of skid resistance in the initial stage of operation. Functional damage to the surface layer , affecting the performance and life of the pavement. Aiming at the problem that the surface layer of asphalt pavement is functionally damaged but the structural strength of the pavement is good, when and where to choose which technical measures to repair the surface layer ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/26E01C7/35
CPCC04B26/26C04B2111/0075E01C7/353C04B14/14C04B14/28C04B7/02C04B24/2611
Inventor 过震文麻旭荣徐斌孙文州何昌轩梁亚军
Owner SHANGHAI MUNICIPAL PLANNING & DESIGN INST CO LTD
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