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Method for evaluating performance of normal-temperature modified road asphalt

A technology for modifying asphalt and road asphalt at room temperature. It is used in flow characteristics, measuring devices, instruments, etc. It can solve problems such as asphalt volatilization and achieve the effect of ensuring quality and quality.

Inactive Publication Date: 2016-05-04
CHINA ACAD OF TRANSPORTATION SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In addition, the present invention creatively introduces a film aging box to solve the problem of normal temperature modified asphalt volatilization, thereby effectively simulating the unique construction situation of normal temperature modified asphalt after storage and then paving.

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  • Method for evaluating performance of normal-temperature modified road asphalt
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  • Method for evaluating performance of normal-temperature modified road asphalt

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Embodiment Construction

[0033] The present invention is characterized in that the film aging test is used to simulate the thermo-oxidative aging process of asphalt mixture in production and construction. The principle of the film aging test is to put the asphalt sample into the disc, the thickness of the asphalt sample is less than 0.5mm, the test temperature is 100°C, the test time is 5h, the oven is automatically ventilated, so the thickness of the asphalt film, aging temperature and aging time, air circulation The effects are similar to the thermo-oxidative aging process in the production and construction of asphalt mixture on the project site. Therefore, referring to the test principle of the film aging test, through the experimental research on the strength growth law of the normal temperature asphalt mixture, it is determined that for the normal temperature modified asphalt used in cold regions, the solvent is basically completely volatilized after 7 days at 60°C, and the strength of the mixture...

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Abstract

The invention provides a method for evaluating performance of normal-temperature modified road asphalt to solve problems that there is no method for evaluating performance of normal-temperature modified asphalt in either a conventional national standard or an industrial standard, the quality of the asphalt is hard to control, and the application area of the asphalt is difficult to determine. The method comprises the following steps: 1) measuring the 60 DEG C rotary viscosity, a cone penetration, a needle penetration after solvent volatilization, and adhesiveness and a flash point of a coarse aggregate of normal-temperature modified road asphalt, respectively; and 2) according to test results of the performance above, determining an applicable temperature zone, including three climatic zones of a cold zone, a warm zone, and a hot zone, of the normal-temperature modified road asphalt. Aiming at material composition characteristics and construction molding constructions of the normal-temperature modified asphalt, comprehensive evaluation is performed from five aspects including instant-mixing-and-instant-paving workable performance, post-storage workable performance, road performance after solvent volatilization, water peeling resistance, and service security. The applicable temperature zone of the asphalt is defined, and effective quality guarantee is provided for engineering application.

Description

technical field [0001] The invention belongs to the field of highways and urban roads, and in particular relates to a performance evaluation method of normal temperature modified road asphalt. Background technique [0002] Normal temperature modified road asphalt is a high polymer elastomer produced by using waste plastics and waste rubber. It is an asphalt product that can be mixed and paved at normal temperature. It fills the gap that asphalt pavement is not suitable for construction in winter. It is suitable for high New construction, overlay and repair of graded roads, urban roads, country roads, parking lots, squares and stadiums. [0003] Normal temperature modified road asphalt is a new type of asphalt binder, which contains polymer materials with excellent high and low temperature performance and volatile diluents. It can be mixed in the temperature range of 90-110 ℃, paved at normal temperature, and opened to traffic in time. specialty. However, due to the existen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N11/14G01N11/12G01N33/42
CPCG01N11/12G01N11/14G01N33/42
Inventor 陈景郭朝阳魏道新赵蔚江睿南田苗苗杨建国王曈徐芳
Owner CHINA ACAD OF TRANSPORTATION SCI
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