Concrete impermeability instrument and calibration device thereof

The invention relates to a concrete anti-permeability instrument and a calibration device thereof.The concrete anti-permeability instrument comprises an anti-permeability instrument base and a test mold barrel, the test mold barrel is provided with a conical barrel cavity with the small upper portion and the large lower portion, a barrel flange is arranged at the bottom of the test mold barrel, a base groove is formed in the upper end of the anti-permeability instrument base, and a water inlet connected with the base groove is formed in the anti-permeability instrument base; the device is characterized in that an annular mounting corner is formed between the groove wall and the groove bottom of the base groove, an annular test piece sealing ring is arranged at the mounting corner, the upper end of the test piece sealing ring is used for being in sealing fit with the bottom of a concrete test piece, and the lower end of the test piece sealing ring is used for being in sealing fit with the groove bottom; the in