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A process for preparing foamed SBS modified asphalt and mixture from SBS latex

A technology of modified asphalt and process method, which is applied in the field of preparing foamed SBS modified asphalt and mixtures from SBS latex, and can solve the problem that the warm mixing technology of foamed SBS modified asphalt mixtures has not been widely promoted, has strong cohesion, and is difficult to foam Major problems, achieve significant economic and social benefits, save production costs, and avoid high-temperature aging

Active Publication Date: 2021-10-29
SHANDONG DASHAN ROAD & BRIDGE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, most of the current warm mix technology for foamed asphalt mixtures is to produce foam matrix asphalt mixture by foaming base asphalt. Waiting for request
[0005] At present, SBS modified asphalt is also used to prepare foamed SBS modified asphalt mixture, but because of its strong cohesion, SBS modified asphalt requires high temperature for foaming and difficult foaming, resulting in the foaming of SBS modified asphalt mixture. Warm mix technology is still not widely promoted

Method used

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  • A process for preparing foamed SBS modified asphalt and mixture from SBS latex
  • A process for preparing foamed SBS modified asphalt and mixture from SBS latex
  • A process for preparing foamed SBS modified asphalt and mixture from SBS latex

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] A kind of SBS latex prepares the technological method of foam SBS modified asphalt:

[0043] 1000 g of base asphalt was heated to a molten state (135°C), and injected into a foaming system containing a colloid mill at the same time as 30 g of normal-temperature SBS latex with a solid content of 40%, and the surfactant and water in the SBS latex were used as foaming agents , wherein SBS is used as a modifier, and foamed SBS modified asphalt is obtained under the action of a foaming system containing a colloid mill.

Embodiment 2

[0045] A kind of SBS latex prepares the technological method of foam SBS modified asphalt:

[0046] 1000 g of base asphalt was heated to a molten state (140°C), and injected into a foaming system containing a colloid mill at the same time as 50 g of normal-temperature SBS latex with a solid content of 40%, and the surfactant and water in the SBS latex were used as foaming agents , wherein SBS is used as a modifier, and foamed SBS modified asphalt is obtained under the action of a foaming system containing a colloid mill.

Embodiment 3

[0048] A kind of SBS latex prepares the technological method of foam SBS modified asphalt:

[0049] 1000 g of base asphalt was heated to a molten state (135°C), and injected into a foaming system containing a colloid mill at the same time as 80 g of normal-temperature SBS latex with a solid content of 40%, and the surfactant and water in the SBS latex were used as foaming agents , wherein SBS is used as a modifier, and foamed SBS modified asphalt is obtained under the action of a foaming system containing a colloid mill.

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Abstract

The invention discloses a process method for preparing foamed SBS modified asphalt and mixture from SBS latex, belonging to the technical field of road engineering. The invention discloses a process for preparing foamed SBS modified asphalt. The foamed SBS modified asphalt is prepared through a foaming system containing a colloid mill with SBS latex as a foaming agent and modifier and hot matrix asphalt. The prepared foamed SBS modified asphalt is directly mixed with hot aggregate to obtain foamed SBS modified asphalt mixture. The present invention directly uses SBS latex as foaming agent and modifier instead of water to foam base asphalt through a foaming system containing a colloid mill to prepare foamed SBS modified asphalt; it is not necessary to modify base asphalt with SBS to prepare SBS Modified asphalt also solves the technical problems of low pavement performance of foam matrix asphalt warm mix mixture or difficult foaming of SBS modified asphalt; it has significant economic and social benefits.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a process method for preparing foamed SBS modified asphalt and mixture from SBS latex. Background technique [0002] In order to meet the requirements of my country's modern transportation (large traffic flow and heavy load), the demand for SBS modified asphalt has increased significantly, and it has exceeded 4 million tons per year; however, the production process of traditional SBS modified asphalt is complex and the investment in processing equipment is large. The production cost is high, especially in the process of production, storage and transportation of SBS modified asphalt and the process of mixing, paving and rolling of SBS modified asphalt mixture. Disadvantages such as high-temperature aging, segregation instability, high-temperature aging of SBS modified asphalt mixture, environmental pollution caused by a large amount of harmful gas emissions, and health effe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L53/02C08J9/08C08J9/30C04B26/26
CPCC04B26/26C04B2111/0075C04B2201/20C04B2201/50C08J9/08C08J9/30C08J2203/02C08J2395/00C08J2453/02C04B18/167
Inventor 陈际江樊亮扈利东
Owner SHANDONG DASHAN ROAD & BRIDGE ENG
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