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On the operation and use of concrete impermeability meter

Release time: August 22, 2020 popularity: two hundred and twenty-two

Concrete impermeability meter The operation uses:

1. Preparation
a. Place the impermeable instrument on a flat and solid indoor foundation,
b. Close the drain relief valve located at the bottom right of the box
c. Open 6 control valves
d. For the first time, inject water into the tank, open the control valve, and start the power supply until the water overflows from the 6 mold bases, so as to exhaust the air in the system.

e. Close the control valve
2. Fabrication and installation of test piece
a. According to the material ratio required by the design, the specimen is made by forming die (also known as auxiliary die), and then covered according to the specifications of Ministry of foreign affairs or international standards.

b. Dry the cured surface of the specimen, and then coat the side of the specimen with melted sealing material (fire paint or sealing wax). Pay attention to both ends of the test piece, and do not apply sealing material.
c. Heat the test mold to 40 ℃, then put the specimen coated with sealing material into the mold cavity, then press the test piece into the test mold on the press (screw press or pressure testing machine borrowed from the laboratory) and cool it to normal temperature. The HT-200 multi-functional demoulding machine produced by our factory can not only load, demould and split the test piece, but also observe the water penetration depth.
d. Install the test mold of the pressed specimen on the working table of the impermeability instrument, and tighten the screw cap evenly
3. Turn on the power supply, turn on two red signal lights, adjust the upper limit pointer of the electric contact pressure gauge to 0.1MPa, and the lower limit pointer can be close to but cannot be contacted at the same time (about 0.05Mpa less than the upper limit pointer), Then press the green button to start the power supply. At this time, the water pump starts to work. The pointer of the electric contact pressure gauge rotates clockwise with the increase of water pressure. Pay attention to observe whether the pressure rise is normal and whether there is water leakage in the system. If there is any abnormality, it should be eliminated before entering the test. Iis-4s digital concrete impermeability meter shall be implemented according to the appendix operation instructions.
4. Open the control valve, i.e. send water pressure to the corresponding test body. Pay attention to observe whether there is leakage at the bottom of the test mold. If there is leakage, it is necessary to tighten the compression nut at the corresponding part.
5. After entering the normal test, increase the working pressure by 0.1MPa every 8 hours, and observe whether there is water seepage at the end face of the test piece at any time. If there is water seepage, close the corresponding control valve.
6. When pressure water seeps from the end faces of three of the six specimens, the test can be stopped and the water pressure of 10.0 mm is recorded as the calculation basis.
7. At the end of the test, cut off the power supply, open the water discharge and pressure relief valve, reduce the system pressure to zero, and remove the test mold,
8. Press out the test piece from the test mold, clean the test mold, mold base, and coat with antirust oil for reuse.

 Concrete impermeability meter

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