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Isothermal Stress Relaxation Tester

Isothermal Stress Relaxation Tester TT-PCSSR400-PCStrand

ASTM E328, ISO 15630-3

Application

Torontech’s TT-PCSSR400-PCStrand is used to determine stress-relaxation of metal, such as concrete strand, prestressed concrete bar, and steel rope. Specimen is deformed at a given amount, decrease in stress is recorded over a prolonged period of exposure at constant elevated temperature.

Features:

Torontech’s TT-PCSSR400-PCStrand the Standard Test Methods for Stress Relaxation Tests for Materials and Structure as per ASTM E328, as well as the Standard Test Method of Testing Prestressed Steel (Isothermal Stress Relaxation) as per ISO 15630-3.

Real time display Load versus Time, Temperature versus Time and Relaxation rate versus Time curves. Automatically calculation of 1000 hours tensile stress relaxation rate. High precision temperature recorder attached to record the influence of room temperature variations. Servo-controlled drive system ensures high precision load/displacement/strain close-loop control, as well as low noise. User configurable test methods and customizable report templates. Self-alignment design on specimen anchoring to ensure high accuracy. Patent calibration system mounted on machine to calibrate the load cell as well as the whole machine without disassembly the load cell from machine.

Technical Parameters

Model

TT-PCSSR400-PCStrand

Standards

ASTM E328, ISO 15630-3

Capacity

400 kN

Measuring range

16-400 kN

Load resolution

12N

Load accuracy

±1%

Load measuring accuracy

±0.1% of reading to 1/100 of load weighing system capacity meets or exceeds the

 requirements of the following standards: ISO 7500-1, EN 10002-2, ASTM E4, JIS

 B7721

Creep of load cell

30 minutes <= 0.02%

Position accuracy

±0.5%

Horizontal span

1850 mm

Ball Screw stroke

100 mms

Loading speed

100 – 5000 N/S

Speed accuracy

Set speed<0.05% - Max. Speed: ±1%, Set speed ≥0.05% - Max. speed:±0.5%

Temperature accuracy

Temperature sensor resolution:0.1℃

Temperature sensor accuracy:±0.3℃

Position measurement accuracy

±0.01 of reading or 0.0001 mm, whichever is greater

Specimen Dimensions

PC Strand (mm)

Φ12.7~Φ15.24

Φ12.7~Φ15.24

Φ12.7~Φ15.24

Φ15.2~Φ21.8

PC Wire (mm)

Φ3~Φ9

Φ3~Φ9

Φ3~Φ9

Φ3~Φ9

PC Bar (mm)

Φ7~Φ18

Φ7~Φ18

Φ7~Φ18

Φ7~Φ18

 

 

Power supply

 

Please specify voltage and frequency before placing the order.

Standard optional voltages 3ph, 220/380VAC, 50-60 Hz, Power must be free of spikes and surges exceeding 10% of the nominal voltage.

Operating temperature

0 to +38°C (+32 to +100°F)

Humidity range

10% to 90% non-condensing

Storage temperature

-40 to +66°C (-40 to +150°F)

Machine Dimension L x W x H

1950 mm x 540 mm x 1015 mm

Weight

1400 kg