Asphalt mixture hydrodynamic pressure scouring test methods and apparatus

Abstract

The invention provides a hydrodynamic pressure scouring test method and a device of bituminous mixture. The method comprises the following steps of: disposing a bituminous mixture test piece in a closed container and soaking in water; heating the water to a temperature to be simulated, keeping the temperature, and filling compressed air in the closed container to 0.68 to 0.7 MPa, i.e. applying positive pressure to the water and the test piece; releasing the pressure of the closed container to normal pressure, pumping the closed container to -0.095 to -0.1 MPa, i.e. applying negative pressure to the water and the test piece; and repeating steps to achieve simulation process of hydrodynamic pressure scouring of the bituminous mixture. The steps are respectively used for testing the determination index of water damage resistance of the bituminous mixture test piece. The invention can acquire the attenuation law of water damage resistance performance of the bituminous mixture and the migration law of bituminous in the mixture by applying hydrodynamic pressure to the bituminous mixture test pipe, simulating the actual condition of bituminous pavement and detecting the water stability of the bituminous mixture.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for simulating work environments during hot mix asphalts (HMA) production without requiring any changes made over time due to environmental factors like weathering behavior. It also includes testing methods based on both hydrostatic stress tests and an analysis method called LCQM (Liquid Coolant Quantity Test). By applying varying levels of force repeatedly between two phases - one phase being more resistive than another - it helps predict how well this new material will behave when used next. Overall, these technical feats improve the quality control process and efficiency of HMA construction processes.

Problems solved by technology

Technological Problem addressed in this patents relates to improving the durableness or impact strength of asphaltic mixes used in roads during rainwater exposure. Current solutions involve adding extra materials like calcium chloride or silica gel that improve their properties but they may also cause environmental concerns such as acid mist formation when exposed to high temperatures. Therefore there needs an improved solution called the newest approach described in the technical problem being solved.

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