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SMA asphalt concrete modifier and preparation method thereof

A technology of asphalt concrete and modifier, applied in the field of asphalt concrete, can solve the problem that SBS modifier and lignin fiber are difficult to melt and granulate together, so as to improve cohesiveness and high temperature performance, reduce granulation temperature, prevent The effect of leakage

Active Publication Date: 2017-04-26
BEIJING ZHONGLU PAVING TECH +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problem in the prior art that the SBS modifier and the lignin fiber are difficult to melt and granulate together, the present invention provides a SMA mixture modifier and its preparation method, as well as the use of SMA mixture to modify SMA compound prepared by chemical agent

Method used

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  • SMA asphalt concrete modifier and preparation method thereof
  • SMA asphalt concrete modifier and preparation method thereof
  • SMA asphalt concrete modifier and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] 1. Prepare materials

[0074] Weigh each component according to the following parts by weight ratio,

[0075]

[0076] Among them, SBS is linear 791H produced by Yueyang Petrochemical. The lignocellulose is in flocculent form and is produced by JRS Company in Germany. The solubilizer is a mixture of furfural extract oil obtained from the naphthenic crude oil produced by Zhonghai Bitumen minus the third line after furfural refining and naphthenic oil produced from Zhonghai Bitumen in a ratio of 1:1. The co-solvent is EVA produced by Yanshan Petrochemical with a vinyl acetate content of 19% and a melt index of 16 g / 10 min. The crosslinking agent is powdered sulfur with a content of 99.5%, produced by Maoming Petrochemical. The accelerator is a mixture of commercially available zinc oxide and commercially available zinc dibenzyl dithiocarbamate at a ratio of 1:1.

[0077] 2. Preparation of SMA asphalt concrete modifier

[0078] 2.1 Mix SBS powder with co-solvent an...

Embodiment 2

[0083] 1. Prepare materials

[0084] Weigh each component according to the following parts by weight ratio,

[0085]

[0086] Among them, SBS is Star 4303 produced by Yueyang Petrochemical. The lignocellulose is in flocculent form and is produced by JRS Company in Germany. The solubilizing agent is a mixture of naphthenic crude oil produced from Zhonghai bitumen minus third-line furfural extraction oil and 110# bitumen in a ratio of 1:1. The co-solvent is EVA produced by Yanshan Petrochemical with a vinyl acetate content of 16% and a melt index of 19g / 10min. The crosslinking agent is powdered sulfur with a content of 99.5%, produced by Maoming Petrochemical. The accelerator is a mixture of commercially available zinc oxide: zinc dibenzyl dithiocarbamate: stearic acid in a ratio of 3:1:1.

[0087] 2. Preparation of SMA asphalt concrete modifier

[0088] 2.1 Mix the SBS powder with the co-solvent and solubilizer uniformly at 160°C for 40 minutes. At this time, the SBS po...

Embodiment 3

[0093] 1. Prepare materials

[0094] Weigh each component according to the following parts by weight ratio:

[0095]

[0096] Among them, SBS is a mixture of linear 791H produced by Yueyang Petrochemical and star 4303 at a ratio of 1:1. The lignocellulose is in flocculent form and is produced by JRS Company in Germany. The solubilizer is a mixture of 200# asphalt and naphthenic oil produced by Zhonghai Bitumen in a ratio of 1:1. The auxiliary solvent is EVA with a vinyl acetate content of 28% and a melt index of 400 g / 10 min produced by DuPont Company of the United States. The cross-linking agent is liquid sulfur with a content of 99.5%, which is produced by Maoming Petrochemical. The accelerator is a mixture of commercially available zinc oxide: zinc ethylphenyl dithiocarbamate: stearic acid in a ratio of 3:1:1.

[0097] 2. Preparation of SMA asphalt concrete modifier

[0098] 2.1 Mix the SBS powder with the co-solvent and solubilizer uniformly at 130°C for 30 minutes...

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Abstract

The invention discloses an SMA asphalt concrete modifier and a preparation method thereof, and relates to the field of road engineering materials. The SMA asphalt concrete modifier comprises a modifier basic material composed of an SBS modifier, a cosolvent and a solubilizer, lignin fibers, a crosslinking agent and an accelerator. The preparation method comprises the steps: mixing the SBS modifier, cosolvent and solubilizer at high temperature to obtain the uniformly mixed modifier basic material; carrying out primary cooling treatment on the modified asphalt basic material, adding the lignin fibers and stirring to obtain the modifier basic material mixed with the lignin fibers; carrying out secondary cooling treatment on the modifier basic material mixed with the lignin fibers, adding the crosslinking agent and accelerator, and after uniformly mixing, granulating to obtain the SMA asphalt concrete modifier. The modifier prepared according to the preparation method can be directly added on site, solves the problems of segregation in storage and property attenuation of SBS modified asphalt, and also solves the construction deficiency of ununiform dispersion of added fibers and probable appearance of oil stain.

Description

technical field [0001] The invention relates to the field of road engineering materials, in particular to an SMA asphalt concrete comprehensive modifier and the prepared asphalt concrete. Background technique [0002] With the development of economy and society, the requirements for the construction quality of road engineering are increasing day by day. Asphalt mastic macadam mixture (SMA) has been widely used for its excellent anti-rutting performance and anti-skid performance. It is one of the preferred pavement materials for grade road construction. [0003] SMA is a kind of asphalt mixture composed of asphalt binder, fiber stabilizer, mineral powder and a small amount of fine aggregate to fill the gaps of the intermittently graded coarse aggregate skeleton. [0004] The quality of the asphalt binder in the SMA mixture must meet the requirements of asphalt mastic, that is, it has high viscosity and excellent high and low temperature performance. Currently, SBS modified a...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B24/36C04B26/26
CPCC04B26/26C04B40/0039C04B2201/50C04B24/2676C04B16/06C04B24/00C04B24/2623C04B22/02C04B22/06C04B24/123C04B24/36C04B24/085C04B14/02C04B14/00
Inventor 唐国奇徐令金
Owner BEIJING ZHONGLU PAVING TECH
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