Introduction
→≥1000h 1000 hours Metallic materials Tensile stress Relaxation Test
→≥1000h 1000 hours Steel strand Relaxation Test
→≥1000h 1000 hours Steel wires and bars Relaxation Test
→WDSC-1000kN Computer Control Steel strand Stress Relaxation Testing Machine(CE CUL/CSA)
→WDSC-1000kN Computer Control Steel Bars Stress Relaxation Testing Machine(CE CUL/CSA)
Function
→used in tensile stress relaxation test for standard strand, indented strand, compact strand, epoxy resin steel strand, PC Strand,unbonded steel strand or monostrand, galvanized, metallic materials, prestressed steel wires,etc.
→used in tensile stress relaxation test for messenger wire, guy wire, core wire or strength member, earth wire/ground wire, barrier cable,structure cable,etc.
→used in tensile stress relaxation test for steel bars for prestressed concrete,P(plain bar), HG(helical grooved bar), HR(helical ribbed bar), R(ribbed bar), etc.
Test Standards
→GB/T10120-2013 Metallic materials-Tensile stress relaxation-Method of test；
→GB/T5224-2014 Steel strand for prestressed concrete；
→GB/T5223-2014 Steel wire for prestressing of concrete；
→GB/T5223.3 Steel bars prestressed concrete；
→GB/T21839 Steel for prestressed concrete-Test methods；
→GB/T13788 cold rolled ribbed steel wires and bars；
→GB/T20065-2016 Screw-thread steel bars for the prestressing of concrete；
→GB/T30828-2014 Middle strength steel wire for prestressed concrete
→GB/T3428-2012 Zinc-coated steel wire for stranded conductors
→GB/T33363-2016 Hot-dip galvanized steel strand for prestress
→ISO 15630-3 Steel for the reinforcement and prestressing of concrete-Test
methods--Part 3:Prestressing steel
→ISO6934-3 Steel for prestressing of concrete-Part3:Quenched and tempered wire
→ISO 6934-4 Steel for prestressing of concrete-Part4:strand
→ISO 14655 Epoxy-coated strand for the prestressing of concrete
→EN 10391 Metallic materials-Tensile stress relaxation-Part1:Test procedure
→ASTM E328-2013 Standard Test Methods for Stress Relaxation Tests
for Materials and Structures
→ASTM A416/A416M-2012a Standard Specification for Steel Strand, Uncoated Seven-Wire for
Prestressed Concrete
→ASTM A882/A882M-2004 Standard Specification for Filled Epoxy-Coated Seven-Wire
Prestressing Steel Strand
→BS 5896-2012 High tensile steel wire and strand for the prestressing of concrete
→JIS G3536 Steel wires and strands for prestressed concrete
→JIS G3137 Small diameter steel bars for prestressed concrete
→JIS Z2276-2012 Method of tensile stress relaxation test for
metallic materials
→AS NZS 4672.2 Steel prestressing materials-Testing requirements
Technical Specifications
| 1000kN Steel Strand/Steel Bars Stress Relaxation Testing Machine |
| 1 | max. Load capacity | 1000kN |
| 2 | measuring range of load | 1%-100%FS |
| 3 | load accuracy | ≤±1% |
| 4 | load resolution | 1/±300000F.S |
| 5 | measuring range of deformation | 0.2%-100%FS |
| 6 | deformation resolution | 0.001mm |
| 7 | gauge length of deformation | ≥1800mm |
| 8 | gauge length of steel strand | ≥60 times of nominal diameter of steel strand,≥200 times of nominal
diameter of steel wire |
| 9 | screw stroke | 0-200mm |
| 10 | adjusting rate of screw | 0.001-50mm/min |
| 11 | test space | ≥2500mm |
| 12 | test program of stress relaxation | Full digital closed-loop, uniform loading, hold |
| 13 | nominal diameter of steel strand | Φ9.53mm,Φ11.10mm,Φ12.70mm,Φ15.24mm,Φ17.80mm, Φ19.30mm,Φ20.30mm,Φ21.80mm,Φ28.60mm |
| 14 | loading frame | Horizontal four column, high stiffness, high
stability,vibration-free impact,streamline |
| 15 | voltage | 380V±10% 50Hz |
| 16 | Size of loading frame(L*W*H) | 4600x1200x1500mm |
Data Preserve Stress Test Equipment , Relaxation Testing Machine WDSC - 300KN
