First, the direct reading concrete gas content measuring instrument product introduction:
The direct-reading concrete gas content measuring instrument is used for determining the gas content in the concrete mixture, and is suitable for concrete having an aggregate particle diameter of more than 40 mm, a gas content of not more than 10%, and a slump. The direct-reading concrete gas content measuring instrument body is made of all-aluminum casting, shockproof and waterproof pressure gauge, which is especially suitable for field operation test.
Second, the technical parameters of the direct reading concrete gas content measuring instrument
★ Volume: 7 liters
★Gas volume range: ≤10%
★Maximum particle size of coarse aggregate: ≤40 mm
★ Minimum reading: 0.1%
★Design the highest pressure: 4MPa
★Maximum working pressure: 0.4MPa
★Air tightness test pressure: 0.4MPa
★ Weight: 11KG
Third, the working principle of the direct reading concrete gas content measuring instrument:
★The measuring principle of the instrument is based on the gas equation, between the air chamber holding a certain pressure and the container filled with the sample. When the pressure of the opening and closing is balanced, when the pressure of the two containers reaches equilibrium, the amount of pressure reduction of the air chamber is mortar. The percentage of the air content in the meter indicates the air content in the sample.
★ Direct reading CA mortar gas content measuring instrument is an instrument for measuring the air content in mortar according to "Temporary Technical Conditions for CRTSII Type Slab Ballastless Track Cement Emulsified Asphalt Mortar for Passenger Dedicated Railway".
Fourth, direct reading concrete gas content measuring instrument operating procedures:
★ Wipe the inner surface of the measuring crucible and the cover with a damp cloth, then load the crucible sample and smooth it with a vibrating or inserter until there are no air bubbles.
★ After smoothing, the total mass of the container and the crucible sample is then weighed out.
★ Attach a small piece of thin paper or plastic film to the surface of the valve hole, wipe the flange, cover the cover, tighten the clamp, and open the exhaust valve.
★ Close the operating valve and compress the air from the intake valve so that the pressure pointer is 1Kgf/cm2.
★ Close the operation valve to open the inlet valve and add a small amount of water, close the inlet valve and exhaust valve to make it sealed and not leaking.
★ Open the operation valve to make the compression solution in the gas chamber enter the quantity 。 After the pressure gauge pointer is stable, read the table value.
Five, direct reading concrete gas content measuring instrument features:
★The measuring quantity is made of aluminum alloy acid and alkali resistant material, with strict structure and accurate volume, ensuring the accuracy of direct reading measurement value.
★ Direct reading of the gas content of the measured concrete, the operation is simple and convenient, the numerical value is accurate, and the cumbersome curve for drawing the relationship between the gas content and the pressure gauge value is reduced, which saves time and labor.
★It adopts refined instrument device pressure gauge, which has good safety performance and clear and intuitive dial.
★The sealing ring of each part adopts special sealing material, which has good sealing performance, durability and long service life.
★ Built-in hand pump is light, time-saving and labor-saving.
★ Water injection type measurement, no water injection type measurement.
★ Small size, light weight, easy to carry, suitable for high frequency continuous use in the field.