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SBS (Styrene-Butadiene-Styrene) modified foam warm mix asphalt and preparation method thereof

A technology of modified asphalt and warm-mix asphalt, which is applied in building insulation materials, building components, climate change adaptation, etc., and can solve the problems of poor construction workability, unsatisfactory foaming effect, and reduced road performance of foamed asphalt mixtures. , to achieve the effect of improving road performance, improving mixing and compacting effect, and increasing foaming stability

Pending Publication Date: 2018-09-07
CHONGQING JIAOTONG UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the foaming effect of most asphalt is not ideal, resulting in poor construction workability of the foamed asphalt mixture, and the incomplete adhesion of the foamed asphalt to the aggregate, so the road performance of the foamed asphalt mixture will be limited. reduced degree

Method used

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  • SBS (Styrene-Butadiene-Styrene) modified foam warm mix asphalt and preparation method thereof
  • SBS (Styrene-Butadiene-Styrene) modified foam warm mix asphalt and preparation method thereof

Examples

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Embodiment 1

[0019] One, prepare SBS modified foam warm mix asphalt of the present invention

[0020] The asphalt is made of water, SBS modified asphalt, and cetyltrimethylammonium bromide. The water content is 1.5% to 3% of the mass of SBS modified asphalt. It is 0.25% to 1.00% of the mass of SBS modified asphalt. Concrete preparation is operated according to the following steps:

[0021] (1) Heat the SBS modified asphalt to a molten state (150°C-160°C), then pour it into the asphalt tank of the foaming machine, and the asphalt in the asphalt tank starts to circulate under the drive of the circulating pump;

[0022] (2) Add cetyltrimethylammonium bromide with a mass of 0.25% to 1.00% of SBS modified asphalt into the asphalt tank, and stir with a glass rod for 3 to 5 minutes, and then let the hot asphalt flow under the drive of the circulation pump for 5 minutes Foam again for ~7 minutes to promote cetyltrimethylammonium bromide and SBS modified asphalt to mix evenly until the SBS modifi...

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Abstract

The invention discloses an SBS (Styrene-Butadiene-Styrene) modified foam warm mix asphalt, which is prepared from the following raw materials in parts by weight: 100 parts of SBS modified asphalt, 1.5-3 parts of water and 0.25-1.0 part of hexadecyl trimethyl ammonium bromide. The invention also discloses a preparation method for the asphalt. The preparation method comprises the following steps: (1) heating the SBS modified asphalt to a fusion state, and pouring the asphalt tank of a foaming machine; (2) adding hexadecyl trimethyl ammonium bromide into the asphalt tank, and stirring; (3) when the SBS modified asphalt reaches a foaming temperature, issuing a foaming instruction to the foaming machine, injecting water into hot asphalt to be foamed, and finally, obtaining the SBS modified foamasphalt. The half-life period of the foam asphalt is obviously improved.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a SBS modified foam warm-mix asphalt and a preparation method thereof. Background technique [0002] Asphalt foaming is one of the key technologies of foamed asphalt mixture, which has an important influence on the road performance of foamed asphalt mixture. The foaming effect of foamed asphalt directly affects the mixing workability of the mixture and the adhesion of asphalt to the aggregate. At present, the foaming effect of most asphalt is not ideal, resulting in poor construction workability of the foamed asphalt mixture, and the incomplete adhesion of the foamed asphalt to the aggregate, so the road performance of the foamed asphalt mixture will be limited. The degree is reduced. [0003] Hexadecyltrimethylammonium bromide molecular formula C 19 h 42 BrN, which is a cationic surfactant, has good surface activity and strong hydrophilicity. Surfactants are usuall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L53/02C08K5/19
CPCC08L95/00C08L53/02C08K5/19Y02A30/30
Inventor 郭鹏曹雪娟朱洪洲何丽红邹晓翎冯云霞韦万峰战琦琦高云何圳谢凤章
Owner CHONGQING JIAOTONG UNIVERSITY
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