Concrete air content Concrete containing gas detector Concrete containing gas analyzer - HC-7L

air entrainment meter

This instrument is mainly applied to the pressure method for orthopedic maximum grain size not greater than 40mm of concrete mix things Determination of air content in line with international GB/T50080-2002 ordinary concrete mixture performance test method standards "air content test requirements.

Main technical parameters:

1, the container volume (equal to the diameter and depth): 7L

2, the pressure gauge range: 0 ~ 0.25 MPa

3, the pressure gauge accuracy: 0.01 MPa

4, orthopedic maximum particle size: 40 mm

First, the HC-7L concrete air content analyzer parameters:

The amount of bowl volume: 7L

Air content range: 0-10%

Division value: 0.2KN

Maximum aggregate sizes: 40mm

Second, concrete air content analyzer operating procedures

1, with a damp cloth to the amount of mortar and cover the inner surface wipe, and then loaded into the concrete specimen, vibration or interpolation trace device erase until no bubbles.

Two later said, smoothing out of the total mass of container and concrete specimens.

3, is operating the valve hole concrete surface mount a small piece of tissue paper or plastic film, wipe the flange to cover the amount of bowl cover, tighten the clamp-on folder, open the exhaust valve.

4, shut down the operating valve, compressed air from the intake valve to pressure pointer 1Kgf/cm2.

5, off tight operation of the valve to open the inlet valve with a little water, close the inlet valve, exhaust valve seal does not leak.

6, open the operating valve to the gas chamber compressed containers to enter the amount of bowl, until the stability of the gauge pointer, read the table value.

air entrainment meter

Determination of the concrete mixture containing gas

Note: Whenever the pressure is read using the fingertips flick the dial and wait for the pointer to stop swinging after reading. The 2,0.1 MPA pressure line for the initial pressure line of the instrument 0.1mPA The initial pressure of the instrument. 7, pressing the valve lever 2-3 times, tapping the bowl in four weeks with a wood so that the pressure evenly distributed throughout the sample again to press the valve stem until the stability of the gauge pointer, the measured pressure gauge degree, and according to the instrument calibration curve of the gas content and pressure gauge readings, the measured instrument of concrete and material samples for the determination of air content A value

After the test,

1, open the valve, the bowl from the amount of gas. For the same sample repeated measurements of gas content, then repeat the above 5-7 steps.

2, open faucet, sent to open the clip, remove the bowl cover.

3, drained concrete mixture in the bowl of the amount of sample, washing the bowl cover and the amount of the inner surface of the bowl.

4, the gas content analyzer does not side continued use. Fine-tune the valve to be opened to deflate the chamber pressure and atmospheric.

Note: During operation, such as the chamber pressure and exhausted through the fine-tuning valve, the amount of bowl pressure must not press valve stem, or else it will water inhalation chamber, the test errors in the future.



Fourth, the determination of concrete containing gas analyzer concrete mixture

During the concrete mixture gas content determination should first measure the aggregate value of the gas-bearing, Determination of press steps. 1 Press the coarse and fine aggregate weight calculated for each sample. : WG, the WS-were in each sample coarse, fine aggregate weight (KG) V-containing gas analyzer amount of bowl volume (liters) Gg and Cs-, respectively, per cubic meter of concrete in crude aggregate consumption (kg)

2, the amount of pot Sheng-third only a high degree of water, said a good coarse and fine aggregate and mix well, slowly pour in the amount of bowl into the air by adding the sample should be minimal, the water is increased by 20-30mm, it should be gently inserted pound 10 times, and I stirred a little tap at any time the amount of mortar in order to exclude the air. The feeding process so that the water always manage higher than expected, the top surface of the aggregate full join, and then soak for five minutes, and tapping of the bowl wall, to exclude air bubbles, then remove the water to foam, add water to the full.

3, wipe the amount of mortar and mortar to cover the edge of the rubber O rings (230 × 8.6) put in the bowl to cover the edge of the groove, cover the bowl cover, with a cramp, gas-tight and good, and the level meter Check the level. The remaining steps the relevant provisions of the determination of air content of concrete mixture, the measured level aggregates air content C

.air entrainment meter

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