STTM600 PC Steel Strand Deflected Tensile Testing Machine

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DETAIL

Introduction

→Adopting horizontal frame structure, hydraulic loading, digital display test parameters.

→ It is composed of loading frame, hydraulic pack, digital display system, safe protection system, functional parts, etc.

→ Adopting digital lower machine, connected with pressure sensor and to control the oil pump, steel strand is loaded by cross-core jack driven by oil pump.

→ According GB/T21839-2008 Testing Method for Prestressed Concrete Steel, hydraulic loading, sensor, mini-computer and data processing technology is adopted, it is mainly used in 20 degree skew axial tensile testing for prestressed steel strand (diameter of steel strand more than 12.5mm but less than 18mm) and determine the reduction coefficient of max. load and deflected tensile coefficient D.

Test Standards

→GB/T21839-2008 Steel for prestressed concrete-Test methods

→ISO 15630-3:2002 Steel for the reinforcement and prestressing of concrete-Test methods-Part 3:Prestressing steel

→GB/T5224-2014 Steel strand for prestressed concrete

(ISO 6934-4:1991, Steel for the prestressing of concrete--Part 4:Strand)

→JIS G3536-2008 Steel wires and strands for prestressed concrete

→ASTM A416/A416M-2010 Standard Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete

→ASTM A882/A882M-2004a(2010) 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. Specification

2. Technical Specification

STTM500 Steel Strand Deflected Tensile Testing Machine
1	Max. Load capacity	600kN
2	Measuring range of load	2%-100%F.S
3	Load accuracy	≤±1%
4	Load accuracy	1/±200000F.S
5	Adjusting moving rate	0.5-50mm/min
6	Loading rate	30MPa/s-60MPa/s
7	Measuring range of deformation	0.2%-100%FS
8	Deformation resolution	0.01mm
9	Diameter of steel strand	≥12.5-13.0mm, 15-16mm, 17-18mm/customized as required
10	Length of steel strand	≥2000mm
11	Gripper of steel strand	3 times of nominal diameter of steel strand
12	Piston stroke	0-200mm
13	Loading frame	Horizontal structure, high rigidity, high stability
14	Working power	380V±10%, 50Hz（need reliable landing）
15	Power	2.2kW