Quantitative detection method for adhesiveness of asphalt and aggregate

Abstract

The invention relates to a quantitative detection method for the adhesiveness of asphalt and aggregate. The method comprises the following steps that: A: selecting five pieces of regular aggregate ofwhich the particle size is 13.2-19mm, cleaning, drying and weighing the aggregate, dipping the aggregate into preheated asphalt (a drying oven at a temperature of 160DEG C to be kept warm for 2.5h), and quickly stirring the aggregate to enable the asphalt on the surfaces of stones to be evenly coated; B: taking out the stone coated with the asphalt, cooling to the room temperature, weighing the stone, putting in a clean glass bottle, and weighing the total mass; C: filling the glass bottle with water, sealing the bottle glass, putting in a 90-DEG C constant temperature water bath box to be heated for 1 h, and taking out the glass bottle; D: pouring out mixed liquid in the bottle, drying, weighing the total mass of the stone subjected to the water bath and the stone; and E: according to a mass change before and after the water bath, calculating the quality loss rate of the asphalt on the surface of the stone, and judging an adhesiveness level. The method is clear in conditions and simple in operation, through a quantitative method, the adhesiveness between the asphalt and the aggregate is detected, and the influence of subjective human factors is avoided.

Description

technical field The invention relates to the technical field of performance detection of road building materials, and relates to a quantitative detection method for the adhesion between asphalt and aggregates. Background technique As the binder of asphalt mixture, asphalt binds various aggregates together, making the mixture a complete stress-bearing body. When it rains or water accumulates on the road surface, the asphalt pavement is soaked in water for a long time, and the water will enter the pavement structure layer through the gaps between the asphalt pavement materials, thereby reducing the bonding force between the asphalt pavement materials and causing the asphalt to fall from the surface of the adhered material. Peeling; under the circulation of hydrodynamic pressure, water repeatedly scours the pavement, which causes the asphalt film to peel off from the surface of the material, and finally forms pits and other diseases under the long-term traffic load, which is ha...

AI Technical Summary

Problems solved by technology

The test speed of the water boiling method is fast, the particles are large, the asphalt peels off obviously, and it is easy to observe, and most of the raw aggregates have aggregates with a maximum particle size greater than 13.2mm, so the water boiling method is mostly used to test the adhesion of asphalt and aggregates , but because the test conditions of the boiling method are vague, uncertain, and not strict, it brings great differences to the test results; It is determined by the visual judgment of experienced testers, and is greatly affected by human observation factors, so it cannot be quantitatively detected

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