Edge trimmer used for dynamic shear rheometer

Abstract

The invention discloses an edge trimmer used for a dynamic shear rheometer. The edge trimmer comprises two clamping grooves, two handles, two cutting frames and a spindle, wherein each clamping grooveconsists of a groove bottom and groove edges; a round cavity cooperated with the outer edge of the lower fixture of the dynamic shear rheometer is formed between the bottoms of two grooves. The edgetrimmer is characterized in that the end parts of the two clamping grooves are respectively fixedly provided with a connecting rod; two connecting rods and two bent rods are in cross connection and are hinged to the spindle; each cutting frame consists of semi-circular slices, wherein two ends of each semi-circular slice are respectively fixedly provided with a rectangular sheet; the rectangular sheet on one end is fixedly provided with a vertical insertion rod; the end part of each clamping groove is provided with a jack cooperated with the insertion rod. According to the edge trimmer, asphalt on the outer edge of a dynamic shear rheometer fixture can be dynamically sheared in one time, shearing efficiency is high, an influence on an asphalt specimen is low, the experience accuracy of thedynamic shearing rheology of the asphalt is guaranteed, and the beneficial effect is obvious.

Description

technical field [0001] The present invention relates to a trimmer for dynamic shear rheometer, more specifically, especially to a trimmer for dynamic shear rheometer that can trim off the asphalt beyond the outer edge of the upper and lower clamps at one time edge trimmer. Background technique [0002] Dynamic shear rheometer (DSR) is an important test equipment used in the American SHRP program to test the medium and high temperature performance of asphalt binder, and can be used to evaluate the high temperature stability and fatigue resistance of asphalt. During the DSR test, stick the poured asphalt sample to the center of the upper fixture, press the upper fixture down, so that the upper and lower fixtures squeeze the asphalt sample to the set value, and then press the asphalt sample beyond the upper and lower fixtures. Trim away along the asphalt. [0003] The routine operation is to use a scraper whose end is bent into a right angle to scrape and trim the sample alon...

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Problems solved by technology

[0003] The routine operation is to use a scraper whose end is bent into a right angle to scrape and trim the sample along the circular outer edge of the upper and lower fixtures. To make the asphalt sample and the outer edge of the upper and lower fixtures neat, this operation is time-consuming, laborious, inefficient and the trimming effect is not good; and before scraping the sample, it is necessary to heat the scraper on the electric furnace a little, otherwise the viscous material such as asphalt will be damaged. It is impossible to use a cold scraper to scrape the sample, but the temperature of the scraper cannot be well controlled by heating with an electric furnace, and it is easy to cause adverse effects on the temperature-sensitive material such as asphalt

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