Sealing device and method for detecting water permeability coefficient of asphalt pavement

Abstract

The invention discloses a sealing device and method for detecting the water permeability coefficient of an asphalt pavement. The sealing device is composed of an inner ring, an outer ring and connecting member. The inner ring has the inner diameter of 140 mm, the outer diameter of 150 mm, the width of 5 mm, and the thickness of 2 mm; the outer ring has the inner diameter of 220 mm, the outer diameter of 230 mm, the width of 5 mm, and the thickness of 2mm; and each connecting member has the width of 2mm, the length of 45mm and the thickness of 2mm. The four connecting members are distributed uniformly and are connected at the inner and outer rings. All components of the sealing device are made of silica gel materials. In addition, the invention also discloses a method for water permeabilitycoefficient detection of the pavement based on the device. According to the method, after cleaning of the asphalt pavement, the sealing device is arranged on the flat pavement; the road petroleum asphalt heated at the temperature of 125 DEG C is poured between the inner ring and the outer ring; after the surface temperature of the asphalt drops to about 50 DEG C, the sealing device is removed; awater seepage device is pressed against the surface of the annular sealing material by forces a counterweight is added to prevent flowing of pressure water out of the space between the base and the pavement. Therefore, a complete sealing effect is realized.

Description

technical field [0001] The invention relates to the technical field of pavement performance detection, in particular to a sealing device and method for detecting water seepage coefficient of asphalt pavement. Background technique [0002] Asphalt pavement will be affected by external environmental factors such as wheel load, temperature, water, light, heat, etc. during use. ) puts forward a clear standard for the water seepage coefficient index of various asphalt pavement, which is an important index to evaluate the construction quality of asphalt pavement, therefore, it is necessary to be able to accurately test the water seepage coefficient of asphalt pavement. [0003] At present, the water seepage coefficient of asphalt pavement is tested according to the test method of water seepage coefficient of asphalt pavement (T0971-2008) in the "Highway Subgrade Pavement Field Test Regulations" (JTG E60-2008). For reliability, this method recommends using waterproof putty, putty ...

AI Technical Summary

Problems solved by technology

[0007] The sealing materials used in this operation method are solid materials, and these solid materials are not of the same type as asphalt. These materials are used for sealing in the specific water seepage coefficient test. Under the action of pressure water, it is difficult The effect of complete sealing is achieved. During the test, it is often necessary to re-test due to poor sealing.

[0008] In addition, in this method of operation, the sealing material is manually twisted into strips and stacked in the center of the annular sealing area, which has a certain degree of randomness. The specific position of the sealing material is not certain, resulting in different test times. It is not unique, but the amount of water seepage is closely related to the seepage area. The water seepage coefficient is calculated based on the water seepage amount per unit time, which means that under different test times, the water seepage coefficient measured by this operation method is not the same, and the test results are not reliable.

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