Method for evaluating performances of normal-temperature modified road asphalt
A technology of normal temperature modified asphalt and road asphalt, which is applied in the direction of material inspection products, etc., can solve the problems of inconsistent material characteristics, impossibility of implementation, and inconformity with the actual situation of normal temperature modified road asphalt projects, and achieve the effect of ensuring quality
Inactive Publication Date: 2015-02-18
CHINA ACAD OF TRANSPORTATION SCI
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[0004] In the current "Technical Specifications for Highway Asphalt Pavement Construction" JTG F40-2004, detailed regulations are made on the performance indicators of different types of asphalt binders such as road petroleum asphalt, emulsified asphalt, and liquid petroleum asphalt, but these regulations are not applicable to normal temperature. It is not suitable for modified road asphalt: 1) For normal t...
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[0029] Hereinafter, a specific example—an example of performance evaluation of normal-temperature modified road petroleum asphalt used in hot zones is given to illustrate the present invention in more detail.
[0030] Preparation of Normal Temperature Modified Asphalt
[0031] Heat AH-70 (or AH-90) road petroleum asphalt to 120-130°C, add a normal temperature modifier, for the normal temperature modified asphalt used in cold regions, warm regions and hot regions, the dosage of the normal temperature modifier is respectively 17%, 15% and 13% (internal mixing), keep the asphalt heating temperature constant, and manually stir for about 3 minutes until the room temperature modifier and road petroleum asphalt are evenly mixed.
[0032] 1. Determination of rotational viscosity at 60°C:
[0033] Prepare asphalt samples according to "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) T602, and refer to "Test Regulations for Asphalt and Bituminous...
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Abstract
The invention provides a method for evaluating performances of normal-temperature modified road asphalt, for solving the following problems: a method for evaluating performances of normal-temperature modified asphalt does not exist in existing national standard and industrial standard; the quality of the normal-temperature modified asphalt is difficult to control; and the application area of the normal-temperature modified asphalt is difficult to determine. The method disclosed by the invention comprises the following steps: (1), respectively measuring the rotary viscosity at 60 DEG C, the penetration, the penetration index, the adhesion with coarse aggregates and the flashing point of the normal-temperature modified road asphalt; and (2), according to test results of the performances, determining application temperature areas of the normal-temperature modified road asphalt including a cold area, a warm area and a hot area. According to the invention, aiming at material composition characteristics and construction forming conditions of the normal-temperature modified road asphalt, the normal-temperature modified road asphalt is comprehensively evaluated in five aspects including workable performance, temperature sensibility, water-resistant peeling and use safety; the application temperature areas of the normal-temperature modified road asphalt are definite; and effective quality assurance is provided for engineering application of the normal-temperature modified road asphalt.
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 presenc...
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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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