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Method for preparing plastic warm-stirred modified asphalt mixture

A manufacturing method and technology of modified asphalt, which is applied in the field of manufacturing plastic warm-mix modified asphalt mixture, can solve problems such as asphalt prone to aging, achieve reduced asphalt smoke emissions, high temperature resistance to rutting, and increase service life and road performance effects

Inactive Publication Date: 2011-05-11
GUANGDONG UNIV OF TECH
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  • Application Information

AI Technical Summary

Problems solved by technology

Plastic modified asphalt has good strength and toughness, but ordinary plastic asphalt is damaged by high temperature (185-190°C) during the modification process, and the asphalt in the mixture is prone to aging

Method used

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  • Method for preparing plastic warm-stirred modified asphalt mixture
  • Method for preparing plastic warm-stirred modified asphalt mixture
  • Method for preparing plastic warm-stirred modified asphalt mixture

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Experimental program
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Embodiment Construction

[0027] The performance indexes of the EVA warm-mix modified asphalt mixture of the present invention are shown in Table 1, and the performance indexes of the EVA warm-mix modified asphalt mixture AC-13 are compared with ordinary warm-mix modified asphalt in Table 2.

[0028] Table 1 Performance indicators of EVA warm mix modified asphalt mixture

[0029]

[0030] Table 2 Comparison table of various performance indicators of AC-13 mixture

[0031]

[0032] Note: The asphalt used in the experiments in this table is 70 # Heavy traffic asphalt, aggregate gradation is AC-13.

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Abstract

The invention discloses a method for preparing a plastic warm-stirred modified asphalt mixture, which comprises the steps of: taking asphalt, aggregate, warm-stirred modifier and ethylene-vinylacetate copolymer colloidal particles as raw materials, putting the aggregate preheated to 160 DEG C into a blender, adding the ethylene-vinylacetate copolymer colloidal particles and dry blending, and then adding 145-DEG C hot melted asphalt and warm-stirred modified asphalt for stirring to acquire the plastic warm-stirred modified asphalt mixture. The raw materials are in the following parts by mass: 100 parts of aggregate and 4.5-5.5 parts of asphalt, wherein the mass part of the warm-stirred modified asphalt is 0.09-0.12 time that of the asphalt and the mass part of the ethylene-vinylacetate copolymer colloidal particles is 0.06 to 0.10 time that of the asphalt. The plastic warm-stirred modified asphalt mixture can be used for bituminous pavements with extra heavy traffic volumes, has all better technical indexes compared with the common bituminous pavement, is economic and environment-friendly, and has better water damage resistance property and track resistance property.

Description

technical field [0001] The invention relates to a method for manufacturing plastic warm-mix modified asphalt mixture. Background technique [0002] Warm mix asphalt and plastic asphalt are materials used in highway asphalt pavement. Warm mix asphalt has the characteristics of mixing and low construction temperature (145°C), but warm mix asphalt only reduces the mixing temperature and final rolling temperature of the asphalt mixture, and does not improve the rutting resistance of the asphalt mixture. The plastic EVA (ethylene-vinyl acetate copolymer) micelle modifier can significantly improve the softening point of asphalt, and the anti-rutting performance of the corresponding mixture can be increased by more than 4 times than that of ordinary asphalt mixture. Plastic modified asphalt has good strength and toughness, but ordinary plastic asphalt is damaged by high temperature (185-190°C) during the modification process, and the asphalt in the mixture is prone to aging. The ...

Claims

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Application Information

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IPC IPC(8): C04B26/26C04B24/26
CPCY02A30/30
Inventor 张荣辉周传捷尹应梅李斌
Owner GUANGDONG UNIV OF TECH
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