Test device for evaluating asphalt consumption of asphalt mixture

Abstract

The invention discloses a test device for evaluating asphalt consumption of an asphalt mixture, which comprises a drying box, wherein one side of the drying box is provided with a rotating device, therotating device is connected with a rotating rod, one end of the rotating rod penetrates through the side wall of the drying box and extends into the drying box, and one end of the rotating rod is detachably connected with a roller. By means of the test device, redundant asphalt binders, fine aggregates, mastic and the like in the asphalt mixture sample can continuously rotate in the rotating process and fully contact with the inner wall of a stirring barrel, so that the factor influence of manual sample loading is reduced, the asphalt drain-down test result is more accurate, the asphalt consumption of the asphalt mixture can be evaluated more accurately and quantitatively, the influence of too small asphalt mixture consumption on the durability of the pavement is avoided, and drain-downand oil flooding caused by too large asphalt consumption are also avoided. Compared with traditional asphalt drain-down test equipment, the test result is more accurate, and the effect is more obvious.

Description

Technical field [0001] The invention relates to the technical field of asphalt mixtures, in particular to a test device for evaluating the asphalt consumption of asphalt mixtures. Background technique [0002] Asphalt mixture is a kind of composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, mineral powder, and some also add polymer and lignocellulose; these materials of different quality and quantity are mixed to form different structures. And has different mechanical properties. [0003] At present, when preparing asphalt mixtures according to needs, it is necessary to test the amount of asphalt. However, the threshold of asphalt amount calculated by the thickness of the asphalt oil film, due to different aggregate densities and different water absorption rates, the oil film thickness itself is also an empirical value. Multiple variables and fuzzy values ​​determine the threshold of asphalt dosage, which has its own limitations. It is also unscientifi...

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Problems solved by technology

[0003] At present, when preparing asphalt mixture according to the needs, it is necessary to test the amount of asphalt. However, the threshold value of asphalt amount calculated by using the thickness of the asphalt oil film is also an empirical value due to the difference in aggregate density and water absorption. Multiple variables and fuzzy values ​​determine the threshold of asphalt dosage, which has its own limitations, and it is unscientific to use "powder-binder ratio" as one of the basis for judging. The range of powder-binder ratio is too wide, and the asphalt mixture The use of oil has a lot to do with the physical properties and gradation combination of the aggregate itself. The powder-to-binder ratio cannot reflect these properties, and there are limitations. In addition, when using the asphalt mixture Schellenberg asphalt leakage test, the center of the test procedure uses The instruments and equipment are mainly beakers and ovens. Due to the problem of standing the asphalt mixture and manually loading the samples, the accuracy of the test is greatly affected by human factors, which will lead to errors in the test. For this reason, we propose an evaluation of asphalt A test device for the amount of asphalt in the mixture to solve the above problems

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