Rongjida HC-7L Concrete Air Content Tester Shanghai Air Content Tester

Concrete Air Content TesterComplies with the relevant provisions of GB/T5008-2002 "Test Methods for Performance of Ordinary Concrete Mixtures" regarding the testing of air content in concrete mixtures. The concrete air content measuring instrument is widely used for measuring the air content of concrete in various construction sites such as construction, highways, railways, water conservancy and hydropower, ports, airports, etc., supervising and managing engineering quality, and conducting scientific research and teaching experiments on concrete materials. The stable measurement results provide reliable data basis for scientific research and testing. The body is made of all aluminum casting, with shockproof and waterproof pressure gauges, which are particularly suitable for on-site operation and testing.Used to determine the air content in concrete mixtures, suitable for concrete with aggregate particle size greater than 40mm, air content not exceeding 10%, and slump. It plays an important role in controlling the air content of concrete. This measuring instrument has the advantages of easy operation, accurate measurement, and intuitive reading. It is a concrete mixture air content measuring instrument.

Concrete Air Content TesterIt is a concrete testing instrument, please read the instruction manual carefully before use. And it should be operated by experimental personnel to avoid injury caused by improper operation.For more information, please contact our customer service personnel.causeShanghai Rongjida Instrument Technology Co., LtdProvided, the equipment has a one-year warranty period. If there are any quality problems with the product within one year, the supplier is responsible for free maintenance. If due to improper operation or human damage, our company should also provide repair and replacement services, and the resulting costsOur company will charge at its discretion.

Concrete Air Content TesterApplicable standards:

The product references the following standards:

Test Method for Performance of Ordinary Concrete Mixtures GB/T5008-2002;

Technical Specification for Application of Ordinary Concrete Admixtures GB50119-2002;

Ordinary Concrete Admixtures GB8076-1997;

Test Code for Hydraulic Concrete (DL5150-2001);

Test Code for Cement Concrete in Highway Engineering JTJ053-94.

Concrete Air Content TesterTechnical parameters:

★ Measuring bowl capacity: 7 liters

★ Gas content range: ≤ 10%

★ Coarse aggregate ALarge particle size: ≤ 40mm

★ASmall reading: 0.1%

★ Design AHigh pressure: 4MPa

★AHigh working pressure: 0.4MPa

★ Airtightness test pressure: 0.4MPa

★ Weight: 11Kg

Concrete Air Content TesterofOperating procedures：

Wipe the inner surface of the measuring bowl and bowl cover with a damp cloth, and place the measuring bowl horizontally.

★ Evenly pour the fresh concrete mixture into the measuring bowl, so that a small amount of the concrete mixture is removed from the measuring bowl. When loading materials, a tamping rod can be used to slightly insert and compact them. After installation, when using a vibration table (vibration frequency 50Hz, amplitude 0.5 ± 0.1mm when unloaded) to vibrate, if the concrete mixture sinks below the inner mouth during the vibration process, the concrete mixture should be added at any time. The vibration should be stopped when the concrete surface is flat and glazed.

When using a tamping rod instead of a vibration table, the concrete mixture is divided into three layers and compacted. After each layer is compacted, it is about one-third of the height of the measuring bowl. When compacting the bottom layer, the tamping rod should penetrate the entire depth. When inserting the upper layer, the tamping rod should be inserted into the lower layer by 10-20 mm. After each layer is compacted, the tamping rod can be placed at the bottom of the measuring bowl, and the measuring bowl can be alternately shaken left and right on the ground 15 times.

After compaction, the excess concrete mixture on the surface should be immediately scraped off with a scraper. If there are any depressions on the surface, they should be filled, and then smoothed with a trowel to make the surface smooth and free of bubbles.

Clean the edges of the measuring bowl and bowl cover, place the "O" - shaped rubber seal ring (238 × 8.6) in the groove on the edge of the bowl cover, cover the bowl cover, clamp it with a clamp to ensure good airtightness, and check the level with a spirit level.

★ Open the small faucet and exhaust valve, use a water injector to inject water from the small faucet into the measuring bowl until the water flows out from the outlet of the air valve, and then close the small faucet and exhaust valve tightly.

After closing all valves, use an air pump to inflate and increase the pressure, making the gauge pressure slightly greater than 0.1MPa.

Note: ⑴ Whenever reading pressure, lightly tap the dial with your fingertips and wait for the pointer to stop swinging before reading.

The 0.1MPa pressure line is the initial pressure line of the instrument, and 0.1MPa is the initial pressure of the instrument.

★ Press the valve 2-3 times, lightly tap the measuring bowl with a wooden hammer to evenly distribute pressure throughout the sample, press the valve stem again, wait for the pressure gauge pointer to stabilize, measure the pressure gauge reading, and based on the calibrated relationship curve between gas content and pressure reading, obtain the apparent gas content value A1 of the concrete mixture sample measured by the instrument

Concrete Air Content TesterAfter the test is completed:

Open the vent valve and release air from the measuring bowl. If it is necessary to determine the gas content for the same sample weight, repeat steps 5-7 above.

★ Open the small faucet, loosen the clamp, and remove the bowl cover.

Pour out the concrete mixture sample from the measuring bowl, clean the bowl cover and the inner surface of the measuring bowl.

If the gas content analyzer is not used continuously, the fine adjustment valve should be opened to release air and make the chamber pressure consistent with atmospheric pressure.

Note: During the operation, if the air pressure in the chamber is released through the fine adjustment valve and there is still pressure in the measuring bowl, the valve rod cannot be pressed, otherwise water will be sucked into the chamber, causing errors in future testing.

Concrete Air Content TesterPacking list:

★ One host

★ One copy of certificate of conformity

★ 1 copy of user manual

Attachment: 1) One pestle

2) 1 300mm steel ruler

3) 1 water absorbing ball

4) 1 set of calibration tube (installed on the host)