Method for measuring rock thermal coefficient of linear expansion by utilizing pressure tester
A technology of expansion coefficient and pressure test, applied in the direction of material thermal expansion coefficient, etc., can solve the problem of reducing the time cost of rock thermal expansion coefficient measurement, and achieve the effect of convenient measurement, accuracy and precision.
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[0046] A method for measuring the coefficient of thermal expansion of rocks using a pressure testing machine comprises the following steps in sequence:
[0047] (1) Rock sample processing: select a cylindrical granite sample 3 with a section diameter of 50 mm and a height of 100 mm; drill a circular hole 8 with a depth of 35 mm and a diameter of 3 mm at the axis of the top surface of the granite sample 3, and A lead groove 9 with a width and a depth of 3mm is radiated from the center of the surface axis to the edge;
[0048] (2) Install the heating device of the silicone heater: paste the silicone heater 4 around the side of the granite sample 3, and wrap it with glass fiber tape to fix it. The silicone heater 4 is connected to the silicone heater temperature controller 14 through the silicone heater wire 13 ;Fix the temperature control thermocouple sensor 6 at a height of 65 mm from the bottom of the sample with glass fiber tape, the lower end of the temperature control therm...
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