RELAK
PC Strand Isothermal Stress Relaxation Testing Machine
UNIVER RELAK Series is used to determine stress-relaxation of metal, such as Prestressed concrete strand, Prestressed concrete bar, steel rope and so on., the specimen is deformed a given amount and decrease in stress is recorded over prolonged period of exposure at constant elevated temperature. The product accords with the relevant requirements of
ASTM E328: Standard Test Methods for Stress Relaxation Tests for Materials and Structures
ISO 15630-3: Steel for the reinforcement and prestressing of concrete – Test methods – Prestressing steel (Isothermal Stress Relaxation Test)
Features:
- Extremely high stiffness guarantee the correctness of measurements, the total weight of machine is up to 1600kg which is almost twice of other machines in China.
- Real-time display Load versus time, temperature versus time and relaxation rate versus time curves
- Automatic calculate 1000 hours tensile stress relaxation rate.
High precsion temperature recorder attached to record the influence of room temperature variations - Servo-controlled drive system ensures the high precision load/displacement/strain close-loop control as well as low noise
- User configurable test methods and customizable report template.
- Self-alignment design on specimen anchorage to ensure the the high accuracy
- Patent calibration system is mounted on machine to calibrate not only the load cell but also the whole system without disassembly the load cell from machine.
Typical Applications
Isothermal Stress Relaxation Test
Isothermal Stress Relaxation Test
