Calibration method of multifunctional electric compactor

1 The fall distance of the hammer and the height of the compaction tube are measured with a steel ruler.

2 Use a vernier caliper to measure the diameter of the hammer bottom and the compaction cylinder, respectively in two directions perpendicular to each other, and take the arithmetic average.

3 Weigh the mass of the hammer with a balance.

Multifunctional electric compactor model: DZY-III
â—Ž Application:
The multifunctional electric compactor has the functions of light compaction and heavy compaction, and is suitable for laboratory and field geotechnical tests.
â—Ž Features:
The multifunctional electric compactor is suitable for the design of road, railway, water conservancy, and building foundation filling projects. The standard compaction method is used to determine the relationship between the moisture content of the soil and the dry density under a certain compaction work to determine the soil The optimal water content and the corresponding maximum dry density. To understand the compaction performance of the soil as the basis for compaction control of the soil foundation on the construction site.
This instrument conforms to the (GB-7960 / 87) standard and is an electromechanical integration instrument developed according to the highway test industry standard (T0131-93) issued by the Ministry of Communications, and its structural performance fully meets the load ratio test (CBR) (T0134-93) , The requirements for the production of compaction test specimens in the rebound modulus test (T0135-93). It can produce φ152 mm and φ100 mm lime soil and granite test specimen modules, with light compaction and heavy compaction functions. The control part is processed by computer chip. It can realize automatic counting, automatic shutdown and automatic circulation during operation. The instrument has the characteristics of reliable operation, convenient operation, uniform distribution of hammer traces and good quality of test blocks. Suitable for laboratory and field geotechnical tests

â—Ž Technical indicators of multi-function electric compactor:
1. Heavy compaction test:
Ministry standard: Hammer weight 4.5 kg; drop weight height 450 mm GB: Hammer weight 4.5 kg; drop weight height 457 mm
2. Light compaction test:
Ministry standard: Hammer weight 2.5 kg; drop weight height 300 mm GB: Hammer weight 2.5 kg; drop weight height 305 mm
3. Applicable trial cylinder diameter:
Ministry standard: Φ100mm; Φ152mm National standard: Φ102mm; Φ152mm
4. Hammer head diameter:
Ministry standard: Φ50 mm National standard: Φ51 mm
5. Hammering speed: 30 times / min
6. Motor specifications: 380 volts; 550 watts; 1400 rpm multi-function electric compaction instrument
1. According to the diameter of the test tube, adjust the position of the worktable. Before starting the machine, manually lift the compaction hammer to confirm that the edge of the test mold is not compacted.
2. Take the prepared soil sample and pour it into the cylinder 3-5 times. When the three-layer method is adopted for the small cylinder, each time is about 800-900g; when the five-layer method is adopted, each layer requires about 400-500g of sample. When using the large cylinder, the cushion block should be placed on the bottom plate of the cylinder first. According to the five-layer method, each layer requires about 900-1100g of sample; when using the three-layer method, each layer requires about 1700g of sample. Level the surface and press it slightly, then set the number according to the specified compaction number and start compaction. The real-time impact hammer should fall freely and vertically, and the hammer traces must be evenly distributed on the soil sample surface. After the first layer is compacted, the sample layer is "brushed", then press the "Reset" button, repeat the above method for the remaining layers Soil compaction.
3. After the compaction is completed, use a trowel to scrape along the inner wall of the sleeve to disengage the sample from the sleeve, twist and remove the sleeve, carefully flatten the sample at the top of the cylinder, wipe the outer wall of the cylinder, and weigh . Use a stripper to demold, and sample the water content from the center of the sample.
4. Note that before compacting with a small tube, insert the upper and lower compaction rods; before using the large cylinder, unplug the upper and lower insertion rods.