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Styrene-butadiene rubber modified asphalt mixture and preparation method thereof

A technology of styrene-butadiene rubber and modified asphalt, applied in building structures, building components, building insulation materials, etc., can solve the problems of high equipment requirements, difficult production operation, increase production costs, etc., to improve high temperature and low temperature performance. , The effect of simple production equipment

Active Publication Date: 2017-05-24
CHINA ACAD OF TRANSPORTATION SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of SBR modified asphalt is seldom, the main reasons are: first, the modification of asphalt by SBR is basically limited to the low-temperature performance, but there is no obvious improvement in the high-temperature performance of asphalt; second, because SBR is difficult to break and is not easy to dissolve Due to the formation of a stable system of asphalt, it causes problems such as high equipment requirements, complicated processes, and difficulty in large-scale industrial production.
[0003] In order to solve the problems existing in the preparation process of styrene-butadiene rubber, Chinese patent CN200610023104 discloses a method of adding SBR latex. Although it solves the problem of adding SBR latex, it is easy to cause asphalt overflow due to the large amount of water in the emulsion. Accidents, making production difficult to operate
Chinese patent CN01135212 discloses a method of first making SBR into a high-aromatic fraction to make a mother liquor. Although the purpose of compatibility with asphalt is achieved, the swelling time of SBR is long, which increases the production cost and the production cycle.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] First add 90g of SBR latex to 90g of emulsified asphalt, and heat while stirring. The heating temperature is 100°C, and the stirring time is 50min to prepare the SBR masterbatch. Then heat 3,000g of Liaohe AH-90 base asphalt to 160°C until it flows completely, then add 90g of wax-based warm mix agent to the base asphalt, stir for 15 minutes, then add SBR masterbatch to the base asphalt, the heating temperature is not Change, stirring time is 35min, get modified asphalt, its properties are shown in Table 1.

Embodiment 2

[0029] First add 150g of SBR latex to 75g of emulsified asphalt, and heat while stirring. The heating temperature is 100°C, and the stirring time is 60min to prepare the SBR masterbatch. Then heat 3,000g of Liaohe AH-90 base asphalt to 160°C until it flows completely, then add 60g of wax-based warm mix agent to the base asphalt, stir for 15 minutes, then add SBR masterbatch to the base asphalt, the heating temperature is not Change, stirring time is 45min, get modified asphalt, its properties are shown in Table 1.

Embodiment 3

[0031] First, 210g of SBR latex was added to 70g of emulsified asphalt, heated while stirring, the heating temperature was 110°C, and the stirring time was 75min to prepare the SBR masterbatch. Then heat 3000g of Liaohe AH-90 base asphalt to 165°C until it flows completely, then add 45g of wax-based warm mix agent to the base asphalt, stir for 10min, then add SBR masterbatch to the base asphalt, the heating temperature is not Change, stirring time is 50min, get modified asphalt, its properties are shown in Table 1.

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PUM

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Abstract

The invention discloses a styrene-butadiene rubber modified asphalt mixture and a preparation method thereof. Every 100 parts of matrix asphalt comprises the following components in parts by weight: 1) 100 parts of matrix asphalt, 2) 3.0-7.0 parts of butadiene-styrene latex, 3) emulsified asphalt accounting for 1 / 3-1 / 4 of the butadiene-styrene latex by mass, and 4) 1.5-3.0 parts of ceryl warm-mixing agent. The preparation method comprises the following steps: proportionally and uniformly mixing the butadiene-styrene latex and emulsified asphalt, heating and stirring the mixed solution, respectively adding the mixed solution and ceryl warm-mixing agent into the matrix asphalt, and carrying out common stirring to prepare the styrene-butadiene rubber modified asphalt. The preparation method does not need any high-shear equipment, and can complete the preparation of the styrene-butadiene rubber modified asphalt only by adopting the common direct-current mixing equipment. The styrene-butadiene rubber modified asphalt mixture has the advantages of favorable high / low-temperature properties and simple production technique, and can be produced and processed only by the heating and common mixing equipment.

Description

technical field [0001] The invention relates to a styrene-butadiene rubber modified asphalt mixture and a preparation method thereof, in particular to a composite modified asphalt mixture containing styrene-butadiene rubber and a wax-based warm-mix modifier and a preparation method thereof. Background technique [0002] Polymer-modified asphalt has excellent road performance and has been widely used in the upper layer and even the middle and lower layers of expressways. Styrene / butadiene / styrene (SBS) copolymer modified asphalt is widely used at present. Compared with SBS-modified asphalt, styrene-butadiene rubber (SBR)-modified asphalt has significantly improved the low-temperature performance of asphalt, and the ductility at 5°C can be increased to more than 150cm, which can effectively prevent low-temperature cracking of asphalt pavement in winter and avoid water damage. The life of the asphalt pavement caused by the damage is greatly shortened, and the maintenance cost ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L9/06C08L91/06
Inventor 赵蔚魏道新陈景郭朝阳朱宝林李亚非柴智
Owner CHINA ACAD OF TRANSPORTATION SCI
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