Penetration coefficient determination apparatus for permeable asphalt concrete track board test piece, and test method thereof

Abstract

The invention provides a penetration coefficient determination apparatus for a permeable asphalt concrete track board test piece, and a test method thereof. The determination apparatus comprises a test device and a water supply device, and the test device comprises a workbench, an overflow water tank, an upper sleeve, a lower sleeve, two flanges, an electronic thermometer and a measuring cylinder; the outer sidewall of the upper sleeve is provided with water overflow ports connected with the inside of the upper sleeve, the two same flanges are provided with a ring of a slot, and the two flanges and the sleeve are cemented to form an integral body; the lower sleeve is connected through the overflow water tank, and the overflow water tank is provided with an overflow port and a water drainage port; the test piece is placed between the two flanges, a rubber sealing pad is arranged between each of the flanges and the test piece, the flanges are provided with screw holes, and the test piece is fixed through allowing long bolts to traverse through the screw holes and through using nuts; and the water supply device comprises a water storage barrel, a water pump and a power switch. The apparatus has the advantages of reasonable structure, simple operation, satisfactory solving of the seepage problem of the side wall, realization of flexible control of hydraulic gradient, and reasonable and reliable determination result.

Description

Technical field [0001] The invention relates to the technical field of measuring the permeability coefficient of road engineering materials, in particular to a constant-head vertical permeability coefficient measuring device and a testing method for a permeable asphalt concrete rut plate test piece. Background technique [0002] As a kind of environmentally friendly road structure layer, permeable asphalt pavement has many advantages such as drainage, anti-skid, and noise reduction. It solves the problem of road runoff rainwater infiltration, and at the same time can replenish groundwater. Its sufficient storage capacity and ability to reduce runoff pollution load have attracted widespread attention in the field of road engineering at home and abroad. [0003] Permeability coefficient is one of the most effective and direct indicators reflecting the drainage capacity of porous media. Instruments for measuring permeability coefficient indoors are generally divided into two types: co...

AI Technical Summary

Problems solved by technology

Through investigation, it is found that the existing permeability coefficient measuring devices at home and abroad have the following problems to varying degrees: 1. The side wall side leakage problem has not been well solved; 2. The control of hydraulic gradient is inflexible, and the practical application is not widespread. 3. The structure of the device is complex and the actual operation is cumbersome

In addition, most of the materials tested in the laboratory are Marshall specimens formed by the compaction method. However, such specimens are small in size and have large differences between individual specimens, which will affect the accuracy of the measurement data. However, there is no permeability coefficient measuring device designed for rutting slab specimens at present.

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