Test method for evaluating asphalt consumption of asphalt mixture

Abstract

A test method for evaluating asphalt consumption of the asphalt mixture is provided. The method comprises the following steps: S1, preparing a leak tester, a leak test cylinder, a glass plate, a smallasphalt mixture mixer, a hand shovel, a balance, and a cotton yarn test tool; S2, according to an asphalt viscosity temperature test, determining a mixing temperature to conduct a leak test; S3, in the leak test cylinder that is washed and dried, weighing the leak test cylinder m0 accurate to 0.01g, and putting the leak test cylinder m0 in a test box for a constant temperature, wherein the constant temperature time is not less than 2 hours; and S4, according to the mix ratio of the asphalt mixture that is actually used, mixing the mixture of the aggregate, the ore powder, the asphalt, the fiber stabilizer and the like by using the small asphalt mixture mixer according to the method of T7022, and during the mixing, adding a fiber stabilizer after the coarse and fine aggregates are added. According to the test method provided by the present invention, the amount of asphalt consumption in the asphalt mixture can be accurately and quantitatively evaluated, the influence of too little asphalt on the durability of the pavement can be avoided, and leakage and oil flooding caused by too much asphalt can be avoided.

Description

technical field [0001] The invention relates to the technical field of asphalt, in particular to a test method for evaluating the amount of asphalt in an asphalt mixture. Background technique [0002] At present, there are two calculation methods for the amount of asphalt in asphalt mixtures. One is to calculate the thickness of asphalt oil film, according to the gradation of the mixture composition, to calculate the specific surface area, and to calculate the threshold of asphalt amount according to the empirical asphalt oil film thickness. The other is to calculate the powder-to-glue ratio. , in the asphalt mixture, the ratio of the 0.075mm sieve penetration rate to the amount of asphalt, in the Suppaper design method, the powder-to-glue ratio is specified to be 0.6 to 1.6. [0003] However, the threshold value of asphalt dosage calculated according to the thickness of an asphalt oil film, due to the difference in aggregate density and water absorption, and the thickness o...

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Problems solved by technology

[0003] However, the threshold value of asphalt dosage calculated according to the thickness of an asphalt oil film, due to the difference in aggregate density and water absorption, and the thickness of the oil film itself is an empirical value, using a variety of variables and fuzzy values ​​to determine the threshold of asphalt dosage has no limitations.

[0004] It is also unscientific to use the two "powder-binder ratio" as one of the basis for judging. The range of powder-binder ratio is too wide, and the oil use of asphalt mixture 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. Therefore, we propose a test method for evaluating the amount of asphalt in asphalt mixtures to solve the above problems

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