Testing device for evaluating asphalt amount of asphalt mixture

Abstract

The invention discloses a testing device for evaluating the asphalt amount of an asphalt mixture. The testing device comprises a drying box, wherein a rotating device is arranged on one side of the drying box; a rotating rod is connected to the rotating device; 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 to a roller. Through the testing device, during a rotating process, excess asphalt binders, fine aggregates, mastic and the like in asphalt mixture samples can be in contact with the inner wall of a stirring barrel fully through continuous rotation, so that the influence of factors of manual loading of the samples is reduced, an asphalt drain-down test result is moreaccurate, and thus the size of the asphalt amount of the asphalt mixture is reduced more accurately, the influence of the too small amount of the asphalt mixture on the durability of the road surfaceis avoided, the drain-down and flooding caused by the too large asphalt amount are also avoided, and compared with traditional asphalt drain-down test equipment, the test result is more accurate, andthe effect is more obvious.

Description

technical field [0001] The invention relates to the technical field of asphalt mixture, in particular to a test device for evaluating asphalt content of asphalt mixture. Background technique [0002] Asphalt mixture is a composite material, mainly composed of asphalt, coarse aggregate, fine aggregate, mineral powder, and some polymers and wood cellulose are added; different structures are formed by mixing these materials with different qualities and quantities. And have different mechanical properties. [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 rat...

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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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