Asphalt and aggregate adhesiveness testing instrument and testing method

Abstract

The invention discloses an asphalt and aggregate adhesiveness test instrument and a test method, and relates to the technical field of road engineering, the asphalt and aggregate adhesiveness test instrument comprises a rack, a water bath barrel, a puller, a loader and a controller. The rack is fixedly arranged; the water bath barrel is detachably mounted on a bottom plate of the rack and is used for performing water bath temperature control on an asphalt mixture sample; the drawing device penetrates through the middle-layer partition plate of the rack, the lower end of the drawing device extends into the water bath barrel, and the upper end of the drawing device is connected with the output end of the loader; the loader is fixedly mounted on a middle-layer partition plate of the rack, and can drive the puller to do reciprocating pressing and pulling motion in a water bath barrel filled with water and an asphalt mixture sample, so as to simulate the pumping action of wheels on an asphalt pavement in rainy days to cause dynamic water scouring on the asphalt mixture; and the controller is fixedly arranged on a top plate of the rack and is electrically connected with the loader and the water bath barrel, so that the system control of water bath temperature control and flowing water scouring of the asphalt mixture sample can be realized. The asphalt and aggregate adhesiveness is evaluated by measuring the quality of an asphalt mixture sample before and after the test and calculating the spalling rate of asphalt and aggregate by using a formula, so that the problems that the test conditions of the existing asphalt and aggregate adhesiveness test are separated from the reality, the test result is greatly influenced by subjective effects of experimenters, and the representativeness of evaluation indexes is poor are solved.

Description

technical field [0001] The invention relates to the technical field of pavement material testing equipment, in particular to a test instrument and a test method for the adhesion of asphalt and aggregates, which are used for the adhesion test of asphalt and aggregates. Background technique [0002] Among the various early damage types of asphalt pavement, water damage is the most important and also the most serious, and many on-site investigation reports have confirmed this. Among many influencing factors, the adhesion between asphalt and aggregate largely determines the water damage resistance of asphalt mixture. Pavement water damage or peeling caused by the attenuation of adhesion strength occurs frequently and widely on high-grade asphalt pavement, and has become one of the main forms of early damage to asphalt pavement. Therefore, how to ensure good adhesion between asphalt and aggregate is the key to preventing water damage to the road surface. [0003] At present, th...

AI Technical Summary

Problems solved by technology

[0006] For this reason, the present invention provides a kind of adhesion test instrument and test method of asphalt and aggregate, to solve the environmental conditions and load types that the existing asphalt and aggregate adhesion test will cause adhesion damage to asphalt and aggregate in the actual road surface Incomplete consideration of factors such as failure process and form, resulting in unrealistic simulation of asphalt-aggregate adhesion damage, resulting in inaccurate evaluation of asphalt-aggregate adhesion

Images