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Aggregate interface enhancer used for asphalt concrete and preparation method thereof

An interface enhancer, asphalt concrete technology, applied in the field of asphalt concrete, to achieve the effect of improving the interface strength of aggregates and enhancing the structural characteristics of gel-type colloids

Inactive Publication Date: 2018-04-27
RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI +2
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The main purpose of the present invention is to overcome the problem of weak bonding interface between asphalt and aggregate, to provide a kind of aggregate interface enhancer and its preparation method

Method used

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  • Aggregate interface enhancer used for asphalt concrete and preparation method thereof
  • Aggregate interface enhancer used for asphalt concrete and preparation method thereof
  • Aggregate interface enhancer used for asphalt concrete and preparation method thereof

Examples

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Embodiment Construction

[0017] The present invention will be further described below in conjunction with the examples. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention.

[0018] The composition and mass content of the aggregate interface enhancer for asphalt concrete of the present invention are shown in Table 1.

[0019] Composition and mass content of each embodiment of table 1

[0020]

[0021] The elastomer is a mixture of styrene-butadiene-styrene block copolymer (brand: Kumho 401) and styrene-butadiene-styrene block copolymer (brand: SBS791). The preferred ratio is 1:2.

[0022] The synthetic resin is a mixture of LH100 petroleum resin and LDPE polyethylene resin, and the preferred ratio of the two is 1:1.

[0023] Described fusion oil is 46# lubricating engine oil.

[0024] The color masterbatch is a resin pigment, black used in Example 1, blue used in Example 2, and y...

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Abstract

The invention relates to an aggregate interface enhancer used for asphalt concrete and a preparation method thereof. The aggregate interface enhancer is prepared from, by weight, 10-50% of an elastomer, 30-50% of synthesized resin, 5-30% of fused oil, 0-0.5% of a color master batch, and 0.25-1.25% of an antioxidant. The preparation method includes the steps of: 1) successively adding the elastomer, the synthesized resin, the color master batch and the antioxidant into a stirring machine, stirring the materials, adding the fused oil, continuously stirring the materials uniformly, and allowing the mixture to stand for 24 h at normal temperature; 2) at 110-180 DEG C, uniformly mixing and melting the mixture through a spiral machine, performing extrusive shaping, and cooling and cutting the product to obtain a cylindrical granular product. Through the high-temperature melting, the aggregate interface enhancer is high in viscosity; when being mechanically stirred with heated aggregate, theenhancer is uniformly dispersed and has excellent combination property with the aggregate. The enhancer is suitable for rolling-type asphalt concrete and pouring-type asphalt concrete with enhanced aggregate interface, thereby improving durability of the asphalt concrete.

Description

technical field [0001] The invention belongs to the technical field of asphalt concrete applied to railway subgrades, and in particular relates to an aggregate interface enhancer for asphalt concrete and a preparation method thereof. Background technique [0002] Asphalt concrete usually refers to a densely graded asphalt mixture that has been rolled and compacted, and its composition is composed of a skeleton composed of aggregates of different sizes and asphalt binder. The heated asphalt binder is in a flow-plastic shape, and is mixed with the heated aggregate evenly after mechanical stirring, and the expected compactness is obtained by mechanical rolling. When the temperature drops to normal temperature, the asphalt binder restores the structural strength, thus endowing the asphalt concrete with road performance. When the mass content of asphalt binder reaches a certain level, the heated asphalt concrete has fluidity under the action of gravity, so it can also be constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L57/02C08L23/06C08L91/00C08L93/04C04B20/10
Inventor 仲新华蔡德钩李享涛渠亚男苏婉玉裘智辉何龙闫宏业楼梁伟石越峰孔庆欣李连吉其他发明人请求不公开姓名
Owner RAILWAY ENG RES INST CHINA ACADEMY OF RAILWAY SCI
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