A long-term water stability evaluation test device and method of asphalt mixture

A technology for asphalt mixture and water stability, which is applied in measurement devices, mechanical devices, analysis materials, etc., can solve the problems affecting the accuracy of evaluation, single evaluation method, and unfavorable development and progress of asphalt mixture water stability testing and other issues to achieve the effect of improving applicability and high reference value

Active Publication Date: 2021-01-05
JIANGSU ZHONGLU ENG DETECTION CO LTD
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Problems solved by technology

However, although the above method simulates the action environment to a certain extent, it mainly indirectly evaluates the water stability of asphalt mixture through mechanical indicators, which is not completely consistent with the actual damage of asphalt pavement, which affects the accuracy of evaluation.
On the other hand, there are also techniques for judging the water stability of asp

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  • A long-term water stability evaluation test device and method of asphalt mixture
  • A long-term water stability evaluation test device and method of asphalt mixture
  • A long-term water stability evaluation test device and method of asphalt mixture

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[0030]When ultrasonic waves act on the liquid, a large number of tiny bubbles will continue to be produced inside the liquid. When the bubbles are generated in the liquid from the high pressure area to the low pressure area, the bubbles will burst, and the burst of each bubble will produce nearly a thousand atmospheres. Shock wave, namely "cavitation phenomenon", the shock wave generated by cavitation can impact and peel off the attachments on the surface of the object. At present, ultrasonic cleaning has been widely used in machinery, medical and other industries, but it has not seen application in the field of road engineering material testing. Therefore, the inventor considered placing the asphalt mixture sample in an ultrasonic water tank, and using the "cavitation" of the ultrasonic wave on the liquid. When the bubble bursts, the water penetrates into the space of the asphalt mixture sample and further impacts the asphalt cement The bonding surface with the aggregate promotes t...

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Abstract

The invention relates to the technical field of water stability testing of asphalt mixtures, and particularly relates to an evaluation test device and evaluation method for the long-term water stability of an asphalt mixture. The test device comprises a loading device and a dynamic water environment simulation device, wherein the loading device comprises a loading pressing rod, an upper pressing plate, an anchor and a bearing plate, and the dynamic water environment simulation device comprises an ultrasonic transducer, a temperature controller, a heating pipe and a steel plate water tank. Thetest device can be used for simulating a stripping effect of the dynamic water pressure in the asphalt mixture on an aggregate particle asphalt film under the condition of wheel load. The water stability of the asphalt mixture is evaluated through the test residual rate and the asphalt film stripping rate, which is more in line with the actual damage situation of the asphalt pavement. According tothe test device and the evaluation method, the water stability of the asphalt mixture in a long-term use environment can be effectively evaluated.

Description

technical field [0001] The invention relates to the technical field of water stability testing of asphalt mixture, in particular to a long-term water stability evaluation test device and method of asphalt mixture. Background technique [0002] Water stability refers to the degree to which a substance is affected by water, also known as the water resistance or water resistance of a substance. Water damage to asphalt pavement means that under the action of water or freeze-thaw cycles on the pavement, due to the repeated action of external loads, water enters the pavement gap and continuously generates hydrodynamic pressure, and water gradually penetrates into the interface between asphalt and aggregate, reducing the asphalt and aggregate. Adhesion ability, and eventually the road disease that causes the asphalt to peel off from the aggregate. [0003] In the prior art, the water stability evaluation methods of asphalt mixture mainly include water immersion indirect tensile te...

Claims

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Application Information

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IPC IPC(8): G01N3/56G01N19/04G01N5/04
CPCG01N3/56G01N5/04G01N19/04G01N2203/0055
Inventor 杜骋何文政张万磊吕阳
Owner JIANGSU ZHONGLU ENG DETECTION CO LTD
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