I. Overview

The asphalt concrete permeameter is in accordance with the DL/T5362-2006 hydraulic asphalt concrete test protocol for determining the permeability coefficient of asphalt concrete. Common water head test

Second, the purpose and scope of application

The asphalt concrete penetrator meets the requirements of the Ministry of Power's hydraulic asphalt concrete test protocol DL/T5326-2006 and is used to determine the permeability coefficient of asphalt concrete. The constant water head test is applicable to test pieces with a large permeability coefficient, and the variable water head test is applicable to test pieces with a small permeability coefficient.

Third, LSY-2 asphalt concrete permeation instrument parameters

1. Penetration test device and test mode: The permeation test device shown in Fig. 1 can be used for the variable head test and the constant head penetration test.

2. Others: measuring cylinders, stopwatches, thermometers, water-stop fillers and heating appliances.

Fourth, the test steps

1. Prepare the asphalt mixture according to the specifications (see Appendix), and form the Marshall test piece according to the specifications. If the core sample is used for testing, the upper and lower ends of the core sample are cut flat by a cutter, and the average height and diameter of the test piece are measured.

2. Remove the upper cover of the infiltration test mold, place the test piece in the center of the test mold, clean the surface of the test piece, remove oil stains, dust, etc., avoid the water and water infiltration around the test piece, and pour water into the hot asphalt seal test. The gap between the mold and the test piece. Avoid hot asphalt when filling

Dye the surface of the test piece and the outflow of asphalt. After the asphalt is cooled to room temperature, install the top cover and tighten the bolts. After the infiltration test piece is installed, it should be inspected to confirm that the test mold is well sealed and the pipe is unobstructed.

3. The test should use distilled water or filtered water, and exhaust before the test by suction or boiling. The water temperature during the test should be higher than room temperature 3 ° C ~ 4 ° C. The water required for the test should be prepared before the start of the test.

4. Test with the penetration test device shown in Figure 1:

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