Method and private facilities for measuring bitumen stiffness and crisp point

Abstract

The present invention discloses a measurement method for asphalt stiffness and brittle point, as well as a special device thereof. The measurement method comprises the following steps that: a metal sheet coated with an asphalt film is arranged on a bracket; a constant-temperature device is controlled to decrease the temperature by 1 DEG C per minute; according to a parameter set by national standard, the metal sheet coated with the asphalt film is bent; an elasticity measurement device is utilized to measure the stiffness of the metal sheet; after a measurement result is transmitted to an elasticity record analysis device in the mode of digital signals, the measurement result is analyzed and calculated; a stiffness curve is output by a digital display device; when the curve drops instantaneously, a corresponding temperature is the brittle point of asphalt. The measurement device provided by the present invention is high in precision and convenient to operate. The measurement method provided by the present invention is high in data accuracy with no interference from human factors. The method can further find out the characteristics of asphalt samples by analyzing the stiffness curve, thereby having important application value in the asphalt brittle point measurement field.

Description

technical field [0001] The invention relates to a method and special equipment for measuring asphalt stiffness and brittle point. Background technique [0002] The principle of bitumen brittle point measurement is to place a certain amount of bitumen sample on a clean metal sheet, and spread the bitumen evenly on the surface of the sheet to form a smooth film, and then control the ambient temperature to drop by 1°C per minute. When it reaches at least 10°C above the expected brittle point, bend the metal sheet at a fixed period, and observe whether there is any crack in the sample on the sheet. When the asphalt film coated on the metal sheet cracks due to being cooled and bent under certain conditions The temperature is the brittle point of asphalt. At present, most of the observations of asphalt film fractures are visual inspections, and the test operators observe the occurrence of asphalt film cracks through the test device. This measurement method is affected by the op...

AI Technical Summary

Problems solved by technology

Although this method eliminates the interference of human factors, it can only measure the brittle point of asphalt samples, and cannot perform statistical analysis on the stiffness variation characteristics of asphalt samples.

For the analysis of asphalt samples, the stiffness change of asphalt film is also an important research parameter, but the current brittle point determination technology cannot meet this requirement

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