Function:
→steel strand tensile stress relaxation test (more than 1000 hours): prestressed steel strand, smooth steel strand, scratched steel strand, die-drawn steel strand, epoxy resin steel strand, galvanized steel strand, unbonded prestressed steel strand, metal materials, prestressed steel wire for isothermal tensile stress relaxation test and research.
→metal materials tensile stress relaxation test (more than 1000 hours): Isothermal tensile stress relaxation test and research are carried out on bridge tie rods, stay cables, bearing cables, stay wires, reinforcing cores, overhead transmission ground wires, road blocks, building structural cables and external prestressed engineering materials.
→stress relaxation test of steel bar (more than 1000 hours): PCB prestressed concrete steel bars, prestressed concrete steel rods, spiral ribbed steel bar, CRB650 / HR, ribbed steel bar R CRB800 / CRB970 cold-rolled ribbed steel bar, PSB785 / PSB830 PSB930 / PSB1080 prestressed concrete with reinforced bar, finish rolling thread steel isothermal tensile stress relaxation test and research were carried out on prestressed components such as concrete centrifugal pipe piles, electric poles and railway sleepers.
Main Tests:
Isothermal stress relaxation test for prestressed steel strand, PC steel bar, steel wire and steel bar, metal material, 1000h stress relaxation test cycle.
Test Standards
→GB/T10120-2013, GB/ T5244-2014 Chinese standard: stress relaxation test time ≥120h, data calculation 1000h.
→ISO 15630-3:2010 international standard: stress relaxation test period ≥120h, data calculation.
→EN European Community standard: stress relaxation test period ≥120h, data calculation.
→NF French standard: stress relaxation test period ≥120h, data calculation.
→AS NZS 4672.2-2007 Australian standard: stress relaxation test period ≥160h, data calculation.
→ASTM E328-2013, ASTM A416/ A416M-2012A American standard: stress relaxation test period ≥1000 hours, no calculation.
→BS5896-2012 British standard: stress relaxation test period more than 1000 hours.
→JIS G3536 Japanese standard: stress relaxation test period more than 1000 hours.
→JIS Z2276-2012 Japanese standard: stress relaxation test period more than1000 hours.
For more prestressed concrete testing machines, please check the following links:
http://www.hrjtest.com/content/?978.html