Test system and method for asphalt foaming performance

Abstract

The invention discloses a test system for asphalt foaming performance. The test system comprises a foam asphalt containing device, a foaming image collecting system and a foaming image analyzing system. The foam asphalt containing device is a bucket body made from a high temperature resistance temperature preservation transparent glass steel material; the foaming image collecting system is composed of two high speed industrial cameras, four white direct current light sources, a data transmission line and an electronic computer; the foaming image analyzing system is composed of an electronic computer and built-in digital image analyzing software. The invention discloses a test method for the asphalt foaming performance. The digital image processing technology is combined, the size distribution rule of asphalt foams can be acquired, and foaming performance evaluation indexes of the expansion rate, the half-life period and the like can be accurately measured. The test result has better accuracy and reproducibility, the equipment source is wide, the operation is simple, the cost is lower, and the universality is higher.

Description

technical field [0001] The invention relates to a testing system and method for asphalt foaming performance, and belongs to the technical field of road asphalt mixture testing. Background technique [0002] Foamed asphalt, also known as expanded asphalt, refers to injecting an appropriate amount of water into the base asphalt under certain high temperature conditions. When the water is heated, it will form air bubbles, which will cause the volume of asphalt to expand rapidly, thereby producing a large amount of asphalt foam. The bubble will burst. During this process, asphalt only undergoes physical changes, and the viscosity of foamed asphalt will be significantly reduced, so that it can be fully mixed with cold and wet aggregates. Foamed asphalt is mainly suitable for road cold recycling technology and warm mixing technology. It has irreplaceable advantages of other road construction technologies. It can not only reduce road maintenance costs, but also has considerable be...

AI Technical Summary

Problems solved by technology

Although this kind of technical means can completely record the whole process of the foaming test, and the test accuracy is relatively high, it requires high test equipment, high cost, complicated operation and cannot be easily carried.

[0006] In addition, neither of the above two methods can observe the size distribution of asphalt foam and its changing trend, and obtaining the size distribution of asphalt foam is of great significance for exploring its foaming mechanism and evaluating its foaming effect

Moreover, because asphalt has a high adhesion and is a black opaque substance, and the temperature of the foamed asphalt measuring container itself is generally low, the foamed asphalt often adheres to the measuring scale during the measurement process, thereby greatly reducing the measurement accuracy.

After each test, the scale needs to be cleaned, the procedure is cumbersome, and it is easy to cause damage to the scale

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