Concrete Vibrate consistency test standard and description

Concrete Vibrate consistency test standard and description

First, the concrete Weibo consistency meter   Overview

The VBR-II concrete Weibo consistency meter is improved on the basis of the type I product, and the slump and Weibull consistency values ​​obtained by the test are all numerical results. It is suitable for the determination of dry hard concrete with a particle size of not more than 40 mm and a Vibres consistency of 5-30 seconds. The instrument complies with GB/T 50080-2002 (GBJ80-85) "Common Concrete Mixture Performance Test Method", JG 3043 and other standards on the concrete mixture Vibres consistency test.

Second, the concrete Weibo consistency meter test installation diagram and packing list technical parameters

1, slumping cylinder

Top inner diameter: 100±2mm

Bottom inner diameter: 200±2mm

Height: 300±2mm

2. Vibration table frequency: 50 ± 3Hz

3. No-load amplitude of the vibration table (including container): 0.5±0.05mm

4, pressure: 2750 ± 50g

5, motor power: 0.25Kw

6, voltage: 380V

7, dimensions: 380 × 500 × 670mm

8, total weight: 50Kg

Third, the concrete Weibo consistency meter test installation diagram and packing list structure principle

The instrument is shown in Figure (1) and consists of the following components:

1. The inner diameter of the container is 240±5mm and the height is 200±2mm.

The internal dimensions of the slump cylinder are: bottom diameter 200±2mm

Top diameter: 100±2mm

Height: 300±2mm

2, rotating frame

Connected to the rod and feed port. A transparent and horizontal disc is mounted on the lower part of the rod, and the rod is fixed in the digital display with a set screw. The rotating frame is mounted on the column by a cross recess to control the direction, and the fixing screw is used to fix its position. After the position, the axis of the measuring rod and the feeding port coincides with the axis of the container.

The transparent disc has a diameter of 230 ± 2 mm and a thickness of 10 ± 2 mm. The load block is directly attached to the disc. The total weight of the sliding part consisting of the measuring rod, the disc and the load block is 2750 ± 50g.

3, concrete Vib consistency instrument test installation diagram and packing single boring bar: diameter 16 mm, length 600mm steel rod, the end should be rounded.

4. Vibration table: working frequency 50±3Hz, no-load amplitude 0.5±0.05mm. Concrete Vibrate consistency test standard and description

Concrete Weibo consistency meter

This instrument is to determine the Vibres consistency value of the bismuth mixture. It is used to evaluate the concrete slump with a concrete slump of 10mm. The maximum aggregate size is 40mm, which is in line with the national standard GBJ80-85.

The main technical parameters:

1 Vibration frequency 50±3Hz

2 motor 0.25 kW 380V

3 no-load amplitude 0.5±0.1mm

Weight: ≈ 50kg

Fourth, the concrete Weibo consistency meter test installation diagram and the adjustment of the packing list instrument

1, instrument level

The non-parallelism of the front surface of the instrument at the factory front is less than 1mm. The measurement method is: place the vibration table on the platform, and measure the height at the four corners of the table with a height gauge. The height should be less than 1mm. If it is found to be out of tolerance, Must be re-adjusted. The method of adjustment is to trim the thickness of the four feet.

2, zero adjustment

The slump cylinder is placed in a container, and a weight (the weight corresponding to the weight of the material) is assembled in the slump cylinder. Loosen the four thread checks, fasten the feed hopper to the upper edge of the slump cylinder, and fasten the rotating frame and column according to the position in Figure (1), then tighten the four hex head screws. Loosen the set screw, place the transparent disc on the slump cylinder according to the position of the figure, and fasten the column and the guide rod. Press the digital display to set the zero key to zero.

Five, concrete Weibo consistency meter   Test installation drawing and packing list test procedure

1. Place the VBR-II digital vibrating consistency meter on a solid horizontal platform and wet the container, slump cylinder, inner wall of the feed port and other utensils with a damp cloth.

2. Fasten the feed port to the top of the slump cylinder, correct the position of the container so that its axis coincides with the axis of the feed port, and then tighten the wing nut.

3. Put the concrete sample obtained according to the requirements into the slump cylinder in three layers with a spatula. After each layer is compacted, it is about one-third of the height. Each layer is evenly inserted with a crowbar. Under 捣25, the second layer and the top layer should be inserted through the layer, and the scorpion bar should just enter the bottom layer of the next layer. After the tamping is completed, the top surface is flattened.

4. Turn the transparent disc to the top of the slump cylinder to lock the set screw and zero.

5. Turn the feeding port and the disc away and lift the slump cylinder vertically. At this time, care should be taken not to cause the concrete specimen to be laterally twisted.

6. Turn the transparent disc to the top surface of the concrete round table, loosen the set screw, lower the disc so that it can gently touch the concrete surface, and the reading value is the slump value.

7. The concrete Vib consistency instrument test installation diagram and packing list are also pressed according to the controller “Start/Stop” button. When the bottom surface of the transparent disc is shaken by the cement slurry, press “Start/Stop” and press the girl. The vibration stops and the controller displays the value (time: in seconds) which is the Vibres consistency value.

Note: If the slump cylinder is lifted, the specimen is trimmed or cut, the specimen is discarded and another specimen is redone. If these phenomena occur twice in succession, the concrete taken cannot be used for this test. Concrete Vibrate consistency test standard and description

 

Tianjin Huatong Experimental Instrument Factory is a high-tech entity integrating scientific research, development, production and operation. The main products are concrete cement test equipment, highway geotechnical test equipment, asphalt waterproof coil test equipment, chemical analysis equipment, testing machine, balance, test mold, sieve equipment and so on. We can provide a full set of test instruments and testing equipment for roads, railways, bridges, mixing stations, municipal, colleges and universities, engineering quality testing centers. Our company implements one-year warranty on any instruments sold, and has quality problems replacement within three months, lifetime maintenance, and is responsible for home delivery, installation and commissioning and guiding users.

Tianjin Huatong Experimental Instrument Factory

Address: Sanyuancun Street, Nankai District, Tianjin

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