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Mixing and dissolving method for rubber asphalt containing liquid viscosity-reducing drag-reducing agent

A technology of rubber asphalt and drag reducing agent, which is used in building components, building insulation materials, buildings, etc., can solve the problems of hindered promotion of wet rubber asphalt, increase toxic gas emissions, poor construction and workability, etc., and achieve improved construction. The effect of environment, energy consumption reduction, road performance retention

Inactive Publication Date: 2019-07-19
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, one of the main reasons why the promotion of wet rubber asphalt is hindered is the poor construction workability
The poor construction workability of wet rubber asphalt is caused by its high viscosity
Although the wet rubber asphalt process brings excellent road performance, it also greatly increases its own viscosity and thus increases the construction temperature, which brings troubles to the construction and also increases the emission of toxic gases

Method used

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  • Mixing and dissolving method for rubber asphalt containing liquid viscosity-reducing drag-reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] A rubber asphalt mixing method containing a liquid viscosity-reducing and drag-reducing agent is prepared by mixing the drag-reducing agent-rubber powder modifier with base asphalt.

[0074] The asphalt is base asphalt. The quality of base asphalt is 1000g, and the quality of drag reducer-rubber powder modifier is 23wt% of the total mass of rubber powder and base asphalt, which is 281g, wherein: the quality of rubber powder is 18wt% of the total mass of rubber powder and base asphalt , is 220g, and the rubber powder is desulfurized rubber, which is black and granular at normal temperature; Evotherm-DAT is selected as the viscosity and drag reducing agent, and the quality of Evotherm-DAT is 5wt% of the total mass of rubber powder and matrix asphalt, which is 61g. The liquid chemical warming agent is an amber viscous liquid at room temperature;

[0075] The process of improving the storage stability of wet rubber asphalt includes the following steps:

[0076] (1) Add 61...

Embodiment 2

[0083] A rubber asphalt mixing method containing a liquid viscosity-reducing and drag-reducing agent is prepared by mixing the drag-reducing agent-rubber powder modifier with matrix asphalt.

[0084] The asphalt is base asphalt. The quality of base asphalt is 1000g, and the quality of drag reducer-rubber powder modifier is 23wt% of the total mass of rubber powder and base asphalt, which is 281g, wherein: the quality of rubber powder is 18wt% of the total mass of rubber powder and base asphalt , which is 220g, the rubber powder is devulcanized rubber, which is black and granular at room temperature; the viscosity and drag reducing agent is medium-temperature coal coking heavy oil, and the quality of medium-temperature coal coking heavy oil is 5wt% of the total mass of rubber powder and base asphalt, which is 61g, the medium temperature coal coking heavy oil is dark brown viscous liquid at room temperature;

[0085] The process of improving the storage stability of wet rubber a...

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Abstract

The invention discloses a mixing and dissolving method for rubber asphalt containing a liquid viscosity-reducing drag-reducing agent, which comprises the following steps: conducting pretreating by using the liquid viscosity-reducing drag-reducing agent before wet-process rubber asphalt production, wherein Evotherm-DAT or coal coking heavy oil is selected as the viscosity-reducing drag-reducing agent. The viscosity of wet-process rubber asphalt can be obviously reduced, so that the problem of poor workability of the wet-process rubber asphalt in the construction process is perfectly solved. Themethod provided by the invention is simple, rubber powder is soaked in the viscosity-reducing drag-reducing agent in a closed space before wet-process rubber asphalt production, and an obtained dragreducing agent-rubber powder modifying agent is slowly and continuously added into wet-process rubber asphalt for uniform mixing. The viscosity index of the rubber asphalt is obviously reduced, so that the mixing temperature in the construction process is reduced, and the problems of poor workability of wet-process rubber asphalt construction and harmful gas emission caused by high-temperature construction are solved. With the method of the invention, the pavement performance of the wet-process rubber asphalt is reserved to a maximum extent, and even is improved to a certain extent.

Description

technical field [0001] The invention relates to the technical fields of rubber powder modification technology of pavement asphalt and viscosity reduction technology of asphalt binder, in particular to a rubber asphalt mixing method containing a liquid viscosity and drag reducing agent. Background technique [0002] The advancement of technology is accompanied by a sharp increase in traffic volume. According to statistics, about 1.5 billion rubber tires are produced every year and are eventually discarded and piled up. This not only brings huge economic loss and waste of resources, but also causes environmental problems, such as fires due to spontaneous combustion. Among all the technologies to solve the problem of waste rubber tires, waste rubber tires are processed into rubber powder through a grinding process. The rubber powder particles obtained by secondary processing of rubber tires were once considered to be effective modifiers for road asphalt, and were applied to th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L95/00C08L19/00C08L91/00C08K5/17
CPCC08L95/00C08L2201/08C08L2205/03C08L19/003C08L91/00C08K5/17
Inventor 于华洋任志彬虞将苗
Owner SOUTH CHINA UNIV OF TECH
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