Device and method for simultaneously testing water seepage and drainage capacities of asphalt mixture

Abstract

The invention discloses a device and a method for testing the rutting performance of asphalt mixture which is applied to mountainous highways. The device comprises an upper bearing platform which is connected with a loading system, and a lower bearing platform which is connected with a test sample; the lower end of the upper bearing platform is provided with loading pressing heads; the device is characterized in that: four sloped surfaces, which are sloped along the circumferential direction, are arranged on the upper end face of the lower bearing platform; number of the loading pressing heads is the same as that of the sloped surfaces; and the end face of each loading pressing head is matched with the sloped surface of the lower bearing platform. The device and the method disclosed by the invention can test the rutting performance of asphalt mixture under different longitudinal slope conditions, are convenient for optimization of the asphalt mixture and simple in operation, and do not need large special equipment.

Description

Technical field [0001] The present invention is a testing field for asphalt hybrid roads, which specifically involves a testing device and method for asphalt mixture water seepage and drainage capacity. Background technique [0002] Asphalt concrete pavement has been widely used in China due to the advantages of comfort and convenient maintenance.However, a lot of experience shows that some asphalt pavement has different degrees of damage within the design and use period. Among them, the intensity of the pavement material caused by water is reduced, road pits and mud are a typical disease type.For the high -fill road base used by my country's highway design, the impact of groundwater on the roadbed road structure is relatively small, and the meter precipitation is the main cause of the above diseases. [0003] In order to maximize or delay the occurrence of various types of water damage caused by road meter precipitation, in addition to the reasonable design of the drainage syste...

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Problems solved by technology

[0004] However, with the deepening of quality control research in pavement construction, the defects of the above methods are gradually recognized by people, mainly as follows: (1) In the actual pavement structure, the water seepage of the structural layer is not independent, and the vertical seepage of rainwater It is always accompanied by its discharge process in the direction of the cross slope of the road surface, and the test of the water seepage coefficient of the above-mentioned asphalt mixture is only for the purpose of the vertical penetration test of water, without considering the discharge of water in the horizontal direction; (2) the actual situation In this case, when the rain falls on the road surface, no large water head is formed, so it is not necessary to use the above-mentioned variable water head method when studying the water seepage capacity of asphalt mixture; (3) The surface layer of the pavement structure has a certain transverse slope, and for Different road sections have different cross slopes, resulting in different drainage and water seepage capabilities of the road surface. How to consider the cross slope factor in the asphalt mixture seepage test is not covered by the above method

[0005] It can be seen from the above introduction that the existing methods for testing the water seepage coefficient of asphalt mixture are more or less deficient, and all kinds of methods can only test the vertical water seepage performance of asphalt mixture, and cannot test the horizontal drainage closely related to vertical water seepage. ability to evaluate accordingly

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