The Servo-Hydraulic Concrete Shear Testing Machine applies controlled normal and horizontal loads to the test specimen through independent servo-hydraulic loading systems. The normal load simulates the compressive stress acting on the specimen, while the horizontal load produces shear displacement until the specimen reaches shear failure.

Servo-Hydraulic Concrete Shear Testing Machine

Model: TDYZ-C

I. Product Overview

The TDYZ-C Series Computer-Controlled Electro-Hydraulic Servo Concrete Direct Shear Testing Machine is developed in accordance with the industry standards SL 352-2006, Test Code for Hydraulic Concrete, and DL/T 5150-2017, Test Code for Hydraulic Concrete.

Reference Standards: ASTM D5607, ISRM Suggested Method

Based on existing direct shear testing equipment available in China and abroad, this machine adopts dual-channel electro-hydraulic servo loading technology, dual-sensor technology, computer control, and dedicated software for data processing. The vertical and horizontal loading systems can also be operated independently to perform uniaxial loading tests when required. The machine is designed for direct shear testing of rock discontinuities, such as joints, bedding planes, foliation planes, and fracture surfaces, as well as direct shear testing of rock specimens, rock-concrete or rock-mortar interfaces, and the bonded interfaces between concrete and other materials. It is suitable for determining the shear and shear failure strength of various rock and concrete interface specimens.

II. Control System

The control unit consists of a computer-based control system and a servo-hydraulic oil pump system. It features dual-channel closed-loop control of normal and horizontal stress, as well as normal and horizontal displacement. During testing, the system can perform multi-stage load holding and multi-stage shear tests.

The independent and open test system can be further expanded with additional accessories, providing greater versatility for different testing requirements. The instrument features a compact structure, attractive design, simple maintenance, and easy operation. The entire testing process can be automatically controlled by a computer running Windows 7 or Windows 10.

The equipment is an independently developed domestic product with advanced technical performance. It is suitable for hydraulic and hydropower engineering geological investigations, universities, colleges, research institutions, and other laboratories.

III. Technical Specifications

1. Model: TDYZ-500C / TDYZ-1000C

2. Normal Load (P): 20–500 kN / 40–1000 kN

3. Normal Overload Protection: 2% above the rated full load

4. Normal Working Stroke (S): 0–100 mm

5. Horizontal Load (Q): 20–500 kN / 24–600 kN

6. Horizontal Overload Protection: 2% above the rated full load

7. Horizontal Working Stroke (S): 0–150 mm

8. Normal Clearance: ≤450 mm; Horizontal Clearance: ≤200 mm

9. Shear Loading Rate (V): 0.1–30 kN/s (adjustable)

10. Load Indication: Computer-controlled, with digital display

11. Load Indication Accuracy: ±1%; Displacement Measurement Accuracy: ±1%

12. Loading Method: Dual-channel electro-hydraulic servo loading with fully automatic closed-loop control

13. Shear Box Dimensions: 150 × 150 × 150 mm; Φ50 × 100 mm

14. Motor Power: 1.5 kW

15. Operating Voltage: 380 V / 220 V

16. Machine Weight: 2,500 kg

17. Overall Dimensions (L × W × H): 1100 × 702 × 1800 mm

IV. Testing Applications

The machine is suitable for a wide range of laboratory direct shear and interface shear tests, including:

Direct shear testing of rock specimens;

Direct shear testing of rock joints and discontinuities;

Shear strength testing of bedding planes and foliation planes;

Shear testing of artificial or natural fracture surfaces;

Direct shear testing of rock-concrete interfaces;

Direct shear testing of rock-mortar interfaces;

Shear strength testing of concrete interfaces;

Shear testing of concrete bonded to other construction materials;

Shear failure testing under controlled normal loading conditions.

It is particularly suitable for laboratory research and engineering testing related to hydraulic and hydropower projects, geological investigations, concrete structures, rock mechanics, and construction materials.

V. Product Features

1. Dual-Channel Servo-Hydraulic Loading: Independent normal and horizontal loading systems provide precise control of loading conditions.

2. Closed-Loop Control: Real-time feedback of load and displacement enables accurate and stable test control.

3. Computerized Data Acquisition: Test parameters and measurement data can be monitored, recorded, and processed by computer.

4. Multi-Stage Testing: Supports multi-stage load holding and multi-stage shear testing for different experimental requirements.

5. Flexible Test Configuration: The vertical and horizontal loading systems can operate independently for specific uniaxial loading tests.

6. Wide Testing Capability: Suitable for rock, concrete, mortar, rock-concrete interfaces, and other bonded material interfaces.

7. Expandable System: The open test structure allows additional fixtures and accessories to be added for specialized testing applications.

8. Robust Laboratory Design: Compact structure, simple maintenance, and convenient operation make the machine suitable for long-term laboratory use.

VI. Why Choose the TDYZ-C Series?

The TDYZ-C Series combines servo-hydraulic loading, dual-channel closed-loop control, computerized data acquisition, and flexible specimen configurations in one testing system. Its ability to independently control normal and horizontal loading makes it suitable for both conventional shear tests and more advanced research on rock discontinuities and material interfaces.

With its wide testing range and expandable configuration, the TDYZ-C Series provides a versatile solution for concrete shear testing, rock direct shear testing, rock joint shear testing, and interface shear strength testing.