The Low-Temperature Frozen Soil Flexural Strength Tester is designed to evaluate the flexural strength of frozen soil under controlled cryogenic conditions. Equipped with precise temperature control and an advanced loading system, the device simulates cold-region environments to accurately assess soil properties, structural integrity, and failure characteristics.

Low-Temperature Frozen Soil Flexural Strength Tester

Model:TGSYD-1

I.Reference Standards:

1.GB/T2611-2007 General Technical Requirements for Testing Machines

2.JJF1103-2003 Evaluation of Computer Data Acquisition Systems for Testing Machines

3.JJG139-1999 Verification Procedures for Tensile,Compressive and Testing Machines

4.MT/T593.4-1996 Test Method for Physical and Mechanical Properties of Artificial Frozen Soil-Part 4:Test Method for Uniaxial Compressive Strength of Artificial Frozen Soil and Part 6:Test Method for Uniaxial Compression Creep of Artificial Frozen Soil

5.ASTM D5520-18 Standard Test Method for Laboratory Determination of Creep Properties of Frozen Soil Samples by Uniaxial Compression

Components of the Microcomputer-Controlled Low-Temperature Frozen Soil Flexural Strength

II.Testing Machine:

1.Low-Temperature Frozen Soil Flexural Strength Testing Machine:Maximum axial pressure 100KN,accuracy 1%

2.Pressure Sensor:Range 0-100KN,accuracy 1%

3.Temperature Sensor:Range-40℃to+40℃

4.Cooling and Temperature Control Equipment

1)Test loading device:A steel pressure head with dual-point loading,which should allow two equal loads to act simultaneously on two third points of the beam;the two support heads and two pressure heads in contact with the specimen should have arc-shaped end faces with a diameter of about 15 mm(to prevent pressure melting at the contact surface,the arc-shaped end faces should preferably be made of non-metallic materials),and one of the support heads and two pressure heads should preferably be designed to be able to roll and tilt back and forth.

2)Samples:Frozen undisturbed soil samples were used,and the sampling and preparation methods were carried out in accordance with the provisions of 6.2.2 in MT/T593.1.Frozen remolded soil samples were used,and the preparation methods were carried out in accordance with the provisions of 6.2.3 in MT/T593.1.

3)Sample dimensions:200mm*50*50mm

4)Sample quantity:4 samples per soil layer per test temperature

The flexural strength is taken as the average of the three measured values.If the difference between the largest and smallest flexural strength valuesof the three samples and the median value exceeds 15%of the median value,the test should be repeated.

III.Product Parameters:

1.Maximum Test Force:100kN

2.Testing Machine Class:1.0

3.Load Measurement Range:0.1%～99%FS

4.Relative Error of Indication:±1%(1.0 Class)

5.Test force resolution:1/±500000FS(resolution remains constant throughout)

6.Deformation measurement range:0.2%～99%

7.Force control rate adjustment range:0.005%～5%FS/S

8.Force control rate accuracy:Within±1%of the set value when the rate is<0.05%FS;within±0.5%of the set value when the rate is≥0.05%FS;

9.Deformation rate adjustment range:0.005～5%FS/s;

10.Deformation rate control accuracy:Within±1%of the set value when the rate is<0.05%FS/s;within±0.5%of the set value when the rate is≥0.05%FS/s;

11.Displacement rate adjustment range:0.01～500mm/min;

12.Displacement rate control accuracy:within±0.2%of the set value;

13.Constant force,constant deformation,and constant displacement control range:0.5%～99%FS