High-viscosity thin-layer bituminous mixture modifier and application thereof

An asphalt mixture and modifier technology, which is used in building thermal insulation materials, coagulative pavement paved on site, building components, etc. Time reduction and other problems, to achieve the effect of compact construction process connection, dense roughness and no water seepage, high construction quality and reliability

Active Publication Date: 2012-10-10
陕西长大博源公路养护科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technology of filling mild ruts at the micro-surface is a thin-layer construction technology of cold-mixed slurry mixture with polymer modified emulsified asphalt as the binder. Be applicable
In addition, there are still some technical problems in the technology of micro-surfacing to fill ruts: (1) strict requirements on aggregates; (2) high requirements on performance indicators of modified emulsified asphalt; The working time is shortened; (4) It is only suitable for ruts with a rut depth of 1-2cm. For road sections with a rut depth of 2-3cm and relatively stable road rut deformation, the technology of filling ruts at the micro-surfacing is not applicable. It is also not suitable to use modified asphalt mixture to fill the minimum structural thickness of not less than 4-6cm.

Method used

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  • High-viscosity thin-layer bituminous mixture modifier and application thereof
  • High-viscosity thin-layer bituminous mixture modifier and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] 1) Prepare high-viscosity thin-layer asphalt mixture modifier, take the preparation of 100kg modifier as an example:

[0043] Weigh 60kg of polyethylene, 6kg of commercially available GW-1401 tackifying resin, 12kg of rock asphalt, 2kg of PE color masterbatch, and 20kg of pottery clay. 170°C, through a screw extruder, prepare a strip-shaped mixture, cool it to room temperature with water, and use a cutting machine to cut the strip-shaped mixture into flake-shaped particles to obtain a high-viscosity thin-layer asphalt mixture modifier;

[0044] The above-mentioned pottery clay can be replaced by fly ash, or mixed with talc and mica powder;

[0045]2) Preparation of high-viscosity thin-layer asphalt mixture: by weight, the aggregate composition is 58% of 6-11mm stone, 12% of 4-6mm stone, 22% of 0-4mm stone, and 8% of mineral powder; 5.8% asphalt; when mixing, the aggregate heating temperature is 175°C, and the asphalt heating temperature is 155°C; the high-viscosity thi...

Embodiment 2

[0051] Weigh 10kg of polyethylene, 40kg of recycled polyethylene, 2kg of GW-1402 tackifying resin, 10kg of lake asphalt, 1kg of PE color masterbatch, and 37kg of talc. Mix and stir all components evenly and add them to the hopper of the screw extruder, heat To 180°C, the strip mixture is prepared by a screw extruder, cooled to normal temperature by water, and the strip mixture is cut into sheet-shaped particles by a cutting machine to obtain a high-viscosity thin-layer asphalt mixture modifier.

[0052] The above-mentioned GW-1402 tackifying resin can be replaced by GW-1401 tackifying resin or GW-1403 tackifying resin, and can also be replaced by mixing GW-1401 tackifying resin and GW-1403 tackifying resin.

[0053] The process of preparing high-viscosity thin-layer asphalt mixture with the modifying agent of this example is basically the same as embodiment 1, but wherein the high-viscosity thin-layer asphalt mixture modifier accounts for 0.3% of aggregate, mineral powder and a...

Embodiment 3

[0056] Weigh 56kg of polyethylene, 14kg of polyolefin wax, 8kg of GW-1403 tackifying resin, 7kg of rock asphalt, 8kg of lake asphalt, 3kg of PE color masterbatch, and 4kg of silica. After mixing the components evenly, add them to the screw In the hopper of the extruder, heat it to 150°C to prepare a strip mixture, cool it to normal temperature with water, and use a cutting machine to cut the strip mixture into granular particles to obtain a high-viscosity thin-layer asphalt mixture modifier.

[0057] Above-mentioned silicon dioxide can also be replaced by mixing talcum and powdered cellulose;

[0058] The process of preparing the high-viscosity thin layer asphalt mixture with the modifier of this example is the same as that of Example 1.

[0059] The milling depth is 1.5 cm when repairing the road surface with the high-viscosity thin-layer asphalt mixture prepared by the modifier of this example, and the rest of the process is the same as in Example 1.

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Abstract

The invention relates to high-viscosity thin-layer bituminous mixture modifier and application thereof, mainly solving the existing problems of restoring overlay and rutting diseases of the current thin-layer bituminous mixture. The high-viscosity thin-layer bituminous mixture modifier provided in the invention comprises the following components by weight percent: 50%-70% of polyolefin, 2%-8% of tackifying resins, 10%-15% of bituminous materials, 1%-3% of color masterbatch and the balance of fillers. The modifier provided in the invention is blended with thick and thin aggregates, mineral powder and bitumen so that the high-viscosity thin-layer bituminous mixture can be obtained; and the bituminous mixture can be used for restoring bituminous pavements with the rutting depth of 1.5-3.0 cmand can also be used for overlaying the thin-layer overlays of freeway bituminous pavements, bridge decks and tunnel pavements.

Description

technical field [0001] The invention relates to the field of repairing of asphalt pavement, thin-layer overlay of asphalt pavement of expressway, overlaying of bridge deck and tunnel pavement, in particular to a high-viscosity thin-layer asphalt mixture modifier and its preparation method and high-viscosity Application of thin layer asphalt mixture modifier. Background technique [0002] Thin-layer asphalt mixture overlay is an economical and reasonable pavement structure. Applying it to expressway maintenance and repair projects can effectively prevent road and bridge decks from deteriorating, improve their flatness, restore anti-skid performance, and protect the pavement. Has a certain reinforcing effect. [0003] The earliest overlay technology is cement concrete overlay, which is mainly used to improve the structural bearing capacity of existing roads and rural roads. The thickness is generally not less than 10cm, often more than 20cm, sometimes as high as 30cm, and the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/00C08L23/06C08L95/00C08L97/02C08L1/02C08K3/34C08K3/36C04B26/26E01C7/35E01C23/09E01D19/12
Inventor 徐培华商博明蔡乾东贾晓放王安玲
Owner 陕西长大博源公路养护科技有限公司
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