- Product Describe
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Overview
The electric lime soil unconfined pressure apparatus, strain-type unconfined pressure apparatus, and lime soil press are used to determine the axial pressure on saturated soft clay under laterally unconfined conditions until sample failure, in order to obtain the soil's unconfined compressive strength. Additionally, the unconfined compressive strength test is used to determine the soil's sensitivity (sensitivity is the ratio of the unconfined compressive strength of the undisturbed soil to that of the remolded soil maintaining natural moisture content).
This product has a built-in micro printer that can print data stream lists and test results.Technical Parameters
1. Test speed: 0.01mm-5mm/min, adjustable. Factory setting is 2.4mm/min. Fast speed: 15mm/min
2. Test force: 10kN Force accuracy: 0.001kN
3. Displacement sensor: 0-30mm, graduation: 0.01mm, linearity: 0.3%.
4. Screw disk diameter: Ф52mm
5. Screw travel distance: 50mm
6. Specimen size: φ50X50, φ50X100, φ40*100, φ39.1*80
7. Weight: 30kg
8. Dimensions: 280x410x520(mm)Main Features
1. 5-inch color touch screen display, data saving and printing.
2. Supports two international standards simultaneously (British Standard BS 1377-4, American Standard ASTM D1883) and domestic standard (Chinese Standard T0134-1993).
4. Has data processing functions, can automatically calculate stress values.
5. Servo motor control with software speed feedback, stepless adjustment of loading speed.
6. Built-in micro printer, capable of printing data stream lists and test results.
7. Data upload capability for easy management and retrieval.Test Method
1. Place the undisturbed soil on the table according to the natural layering direction. Use a soil cutting knife or steel saw to cut a soil column larger than the sample diameter, place it between the upper and lower plates of the soil cutting disk, then carefully cut along the side plate from top to bottom while rotating the disk until the required size is reached. Remove the sample, trim both ends to the required height, ensuring the end faces are flat and perpendicular to the sides, and uniform on top and bottom. If the specimen surface has voids due to lime or other impurities, soil filling is allowed.
2. The specimen diameter and height should be the same as the remolding cylinder diameter and height; the remolding cylinder diameter is 40mm and height is 100mm.
3. Use calipers to measure the height and diameters at the top, middle, and bottom of the cut specimen, then calculate the average diameter DP using the formula:
DP = (D1 + 2D2 + D3) / 4
Where: DP = average specimen diameter in centimeters; D1, D2, D3 = diameters at the top, middle, and bottom of the specimen (cm).
4. Apply a thin layer of vaseline to both ends of the specimen; if moisture evaporates, apply a layer of vaseline to the specimen sides.
5. Place the specimen on the unconfined compression apparatus pressure plate, press the up button until it just contacts the upper pressure plate, then stop. Ensure the displacement meter contacts the lower top plate, rotate the screw on the top plate until the displacement meter shows a reading, click to zero the pressure and displacement, then start the test. After completion, remove the specimen and describe the failure condition.Operating Procedures
1. Place the undisturbed soil on the table according to the natural layering direction. Use a soil cutting knife or wire saw to cut a soil column slightly larger than the sample diameter and height, place it between the upper and lower trays of the soil cutting disk, then carefully cut the required diameter and specified height along the side plate from top to bottom with the wire saw or soil cutting knife. Both ends should be trimmed flat and perpendicular to the sides, uniform on top and bottom. Immediately weigh the sample and measure the moisture content of the trimmed soil.
2. Apply a thin layer of vaseline to both ends and sides of the specimen, place it in the center of the pressure plate, press the up button until the specimen just contacts the upper pressure plate, press the zero button, then start the test. The motor advances the pressure plate at 2.4mm per minute until the soil sample fails. Record the displacement reading and calculate the axial stress.Maintenance and Precautions
1. After use, wipe the instrument clean and apply a thin layer of grease to prevent rust.
2. Pay attention to the maintenance of the pressure sensor and displacement sensor.
Company Profile
Hebei Yinfeng Experimental Instrument Co., Ltd. is a high-tech enterprise dedicated to the research and development, production, and sales of experimental instruments. The company is headquartered in Hebei Province, relying on the strong industrial foundation and technological innovation resources in the Beijing Tianjin Hebei region. It is committed to providing high-precision and high reliability testing equipment and solutions for material testing, engineering quality control, scientific research experiments and other fields.
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Add: Chengnan Industrial Zone, Xian County, Cangzhou City, Hebei Province