I. Complete Set of New Laboratory EquipmentMain Purpose

    This testing machine is used to determine the compressive strength of building materials such as bricks, stones, and concrete.

This machine features electric hydraulic loading, sensor force measurement, digital display of force values, a printer for recording force data, and conversion to compressive strength. It complies with the standard "Standard for Test Method of Mechanical Properties of Ordinary Concrete," requires manual control of loading speed, and is equipped with a loading speed indicator, peak hold function, and overload protection. It is an essential testing and inspection device for construction, building materials, highway and bridge engineering units.

       II. Complete Set of New Laboratory EquipmentMain Technical Parameters

1.      Load:                  2000 kN

2. Accuracy of Indication:              Class 1

3.         Resolution:             0.1 kN

4. Distance Between       Compression Plates:  320 mm

5. Upper and Lower Pressure Plate Specifications:    220×250 mm

6. Piston Diameter*   Stroke: Diameter 250×40 mm

7. Motor Power:             0.75 kW

8. Input Voltage:               380 V

9. Overall Dimensions:         880×480×1400 mm

10. Net Weight:                 600 kg

      III. Complete Set of New Laboratory EquipmentStructural Overview

The testing machine mainly consists of three parts: the body, the hydraulic control box, and the force measurement instrument.

1. Body Section

The body of the testing machine is formed by four columns connecting the cylinder body and the upper beam.

On the upper beam of the testing machine, an adjustment screw, a large handwheel, and a nut screw are installed to adjust the no-load height of the machine. The lower end of the screw is equipped with a spherical seat and an upper pressure plate. The lower pressure plate is placed on the piston of the oil cylinder. When the specimen contacts the upper pressure plate, the spherical seat of the upper pressure plate can self-adjust for balance, ensuring the specimen remains level with the upper and lower pressure plates. The lower pressure plate is engraved with alignment lines for the specimen. During testing, the specimen must be aligned with these lines. A dust cover is installed below the lower pressure plate to prevent or reduce dust from entering the oil cylinder during piston movement, which could damage the cylinder or oil seal. A sealing device is installed between the piston and the oil cylinder to prevent oil leakage. However, if a minimal amount of oil leaks during use, an annular oil groove at the top of the cylinder and an oil discharge channel will direct the oil back to the main tank.

2. Hydraulic Section

     The hydraulic box of this testing machine mainly consists of an oil tank, oil pump, oil filter, motor, speed valve, and return oil valve. The oil pump is a direct-drive axial five-piston pump. During loading, the loading speed should be manually controlled using the speed valve to regulate the piston’s upward movement (the speed valve and safety valve are integrated). During unloading, the return oil valve can be turned to allow the oil cylinder to descend slowly. The safety valve is preset to an appropriate position before leaving the factory. Under normal use, users should not adjust the safety valve.