Indoor acceleration simulation method for asphalt long-term aging and water damage coupling effects

Abstract

The invention discloses an indoor acceleration simulation method for asphalt long-term aging and water damage coupling effects. The indoor acceleration simulation method includes steps: preparing samples, and determining the quantity of water to be added into an improved pressure aging container according to experiment conditions; laying the samples on layered shelves of a test piece rack in the improved pressure aging container, and mounting a rainfall control plate right above the shelf on a top layer; sealing the improved pressure aging container, setting the experiment temperatures, the experiment time and the experiment pressures, and allowing the water to fall right above the top surface of the rainfall control plate so as to simulate rain; completing experiments when the requirement of the experiment time is met, and taking the samples, on which the aging and water damage coupling effects are realized, out of the improved pressure aging container and testing the performance of the samples. Requirements of the experiments can be met by the determined quantity of the water. The indoor acceleration simulation method has the advantages that long-term aging of the aging samples in watered / waterless states can be simulated on the basis of the improved pressure aging container, the indoor acceleration simulation method is further implemented by the aid of an additional rainwater control system, accordingly, water damage procedures in different degrees can be simulated, and environments with asphalt long-term aging and water damage coupling effects in different aging degrees and water damage degrees can be simulated.

Description

technical field [0001] The invention relates to a simulation test method, in particular to an indoor accelerated simulation method for the coupled action of asphalt long-term aging and water damage, and belongs to the field of asphalt test methods. Background technique [0002] The main factors affecting the aging of asphalt are heat, oxygen, light and water, etc. Different influencing factors act individually or interactively, changing the component compatibility and structural linking form of asphalt, and changing the properties of asphalt. Therefore, the research on the influencing factors of asphalt fatigue damage, aging, water damage, etc. has always been a hot topic and subject of research by scholars at home and abroad. The role of the influencing factors is to test whether the new technology and new materials of asphalt pavement are advanced and applicable. . [0003] However, a major deficiency in the research on asphalt aging in the prior art is that it often only...

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Problems solved by technology

[0003] However, a major deficiency in the research on asphalt aging in the prior art is that it often only considers the influence of a single natural factor aging or water damage, etc., and does not consider the joint influence of multiple factors; in the existing research literature, on aging There are very few studies on the properties of asphalt materials under the combined action of water-added damage

[0004] Moreover, due to the limitations of the current test equipment, it brings great inconvenience to the simulation test of aging and water damage acting on asphalt materials

The traditional long-term aging pressure vessel PAV mainly serves for the accelerated aging simulation of asphalt mortar, while the immersion test mainly serves for the accelerated simulation of water damage to asphalt mixture. A single container does not have the simulation of the combined effect of aging and water damage on asphalt materials. Test function

In addition, the morphological difference between mixture and asphalt mortar at high temperature also limits the development of corresponding products and the overall improvement of test methods

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