An asphalt ductility testing device and a method for making a sample

Abstract

The invention discloses an asphalt ductility test mold device, comprising a first end mold, a second end mold, a first side mold, a second side mold, a bottom plate, a top plate, the first end mold, the second end mold , the first side mold, the second side mold, the bottom plate, and the top plate enclose to form an asphalt mold cavity, the first side mold and the top plate are integrally formed, the second side mold is integrally formed with the bottom plate, and the first side mold and the bottom plate are integrally formed. The locking device is passed between the first end mold and the second end mold, and the locking device is also passed between the second side mold and the first end mold and the second end mold. The asphalt injection hole is located in the mold cavity The lowest end of the asphalt overflow hole is located at the top of the mold cavity, the test mold is vertically set, and the asphalt is poured through the asphalt pressure pouring device, and a method for making a sample by using the asphalt ductility test device is also disclosed. The invention has the technical effects of high test precision, strong integrity, convenient assembly and disassembly, one-time forming, smooth surface and high compactness.

Description

technical field [0001] The invention relates to the field of road and bridge engineering, in particular to an asphalt ductility test mold preparation device and a sample preparation method. Background technique [0002] Asphalt ductility refers to the degree of ductility of asphalt, and the greater the ductility, the better the shaping of the asphalt. At present, in order to test the ductility of asphalt, the ductility tester and the standard figure-eight test mold are mainly used for testing. [0003] When the asphalt is filled with the figure-of-eight test mold, the excess asphalt needs to be scraped off the upper surface with a scraper, which is time-consuming, labor-intensive, and labor-intensive. In the process of scraping, it is easy to cause deformation of the asphalt test, which affects the test accuracy, and it is difficult to ensure that the test is up and down. The surface is flat and smooth. In order to solve this technical problem, the Chinese invention patent...

AI Technical Summary

Problems solved by technology

[0003] When the asphalt is filled with the figure-of-eight test mold, the excess asphalt needs to be scraped off the upper surface with a scraper, which is time-consuming, labor-intensive, and labor-intensive. In the process of scraping, it is easy to cause deformation of the asphalt test, affecting the accuracy of the test, and it is difficult to ensure the top and bottom of the test smooth surface

In order to solve this technical problem, the Chinese invention patent application (CN201610572751.X) discloses a block fixing device for ductility samples. Although it can ensure that the upper and lower surfaces of the test are smooth and smooth to a certain extent, it is installed on the top plate. Three drilling holes were drilled, one of which was a grouting hole and two overflow holes. After the formwork was removed, a scraper was still needed to scrape off the overflowing asphalt in the overflow holes. That is to say, it did not completely solve the technical problem of the smooth surface of the asphalt. The most important thing is that it is difficult to ensure the compactness of the asphalt filling because it only depends on the asphalt overflowing from the overflow hole on the top plate to judge whether the asphalt is filled.

In addition, the two side form baffles welded on the bottom plate are prone to deformation during the disassembly and storage process (such as collision, pressure), and the side form baffles are prone to deformation, which affects reuse. Moreover, the bottom plate, top plate, The ductility test mold is set separately, and additional screws and nuts are required to fix it, which is troublesome to disassemble

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