GB/T 21839-2008 Translated English of Chinese Standard. (GBT 21839-2008, GB/T21839-2008, GBT21839-2008): Steel for prestressed concrete - Test methods

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https://www.chinesestandard.net, 2016 M12 7 - 36 pages
This Standard specifies the test methods for tensile, bend, reverse bend, torsion, wrapping, isothermal relaxation, fatigue, stress corrosion, deflected tensile, chemical analysis, measurement of the geometrical dimensions, and determination of the relative rib area of the steel for prestressed concrete.

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Contents

Foreword
5
Symbol description
6
General provisions concerning test pieces
7
Tensile test
8
Bend test
9
Reverse bend test
11
Wrapping test
12
Axial load fatigue test
17
Stress corrosion test in a solution of thiocyanate
19
Deflected tensile test
22
Chemical analysis
26
Measurement of the geometrical dimensions
27
Determination of the relative rib area fR
29
Determination of deviation from nominal mass per meter
31
Test report
32
Annex A Informative Tensile test method of the steel strand for prestressed
33

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