JG/T 398-2012The grouting coupler for rebars splicing (English PDF)

Foreword

This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.

This Standard was proposed by the Institute of Standards and Quotas of the Ministry

of Housing and Urban-Rural Development of the People's Republic of China.

This Standard shall be under the jurisdiction of the Standardization Technical

Committee on Construction Structure of the Ministry of Housing and Urban-Rural

Development.

The drafting organizations of this Standard. China Academy of Building Research,

Guangxi Construction Group Second Construction Engineering Co., Ltd., Beijing

Yugou Co., Ltd., Langfang CABR Construction Machinery Technology Co., Ltd.,

Central Research Institute of Building and Construction Co., Ltd., CABR Technology

Co., Ltd., Zhongtai Construction Group Co., Ltd., Beijing Building Construction

Research Institute Co., Ltd., Peifeng Construction Engineering (Shanghai) Co. Ltd.,

Zhejiang Construction Engineering Co., Ltd. and Baoye Group Zhejiang Construction

Industry Institute Co., Ltd..

1 Scope

This Standard specifies the terms and definitions, classification and types,

requirements, test method, inspection rules and marking, packaging, transportation

and storage of the grouting coupler for rebars splicing (hereinafter referred to as the

grouting coupler).

This Standard applies to the coupler for grouting and splicing hot-rolled ribbed or

remained heat treatment rebars of the diameter 12 mm to 40 mm in reinforced concrete.

2 Normative references

The following referenced documents are indispensable for the application of this

document. For dated references, only the edition dated applies to this document. For

undated references, the latest edition of the referenced document (including any

amendments) applies to this Standard.

GB/T 197 General Purpose Metric Screw Threads – Tolerances

GB/T 228.1 Metallic materials – Tensile testing – Part 1.Method of test at room

temperature

GB/T 231.1 Metallic materials – Brinell hardness test – Part 1.Test method

GB/T 699 Quality carbon structural steels

GB/T 1348 Spheroidal graphite iron castings

GB/T 1499.2 Steel for the reinforcement of concrete – Part 2.Hot rolled ribbed

bars

GB/T 1591 High strength low alloy structural steels

GB/T 2975 Steel and steel products – Location and preparation of test pieces for

mechanical testing

GB/T 3077 Alloy structure steels

GB/T 8162 Seamless steel tubes for structural purposes

GB/T 9174 General specification for transport packages of general cargo

GB/T 9441 Metallographic test for spheroidal graphite cast iron

GB/T 13014 Remained heat treatment ribbed steel bars for the reinforcement of

concrete

GB/T 13298 Inspection methods of microstructure for metals

JGJ 107 Technical specification for mechanical splicing of steel reinforcing bars

3 Terms and definitions

For the purpose of this document, the following terms and definitions apply.

3.1

the grouting coupler

the metal coupler for splicing of rebars through the force transferring impact of cement-

based grouting material, which is usually made by the casting process or mechanical

process

3.2

the whole grouting coupler

the grouting coupler which splices rebars by grouting at both ends of the splice

3.3

the grouting coupler with half thread end

the grouting coupler with one end of the splice spliced by grouting and the other end

spliced by non-grouting; the other end is usually spliced by thread

3.4

the grouting coupler with directly rolling thread end

the grouting coupler with half thread end with the non-grouting splicing end of the splice

splicing rebars by directly rolling thread end

3.5

the grouting coupler with rolling thread end after stripping rib

the grouting coupler with half thread end with the non-grouting splicing end of the splice

by rib-stripped rolling straight thread

3.6

the grouting coupler with thread end after upsetting

b) the first type change of the grouting coupler with rolling thread end after stripping

rib, which is made by mechanical processing and splices rebars of standard yield

strength 500 MPa and diameter 36 for the grouting end or 32 mm for the non-

grouting end, is expressed as. GTJB5 36/32A.

5 Requirements

7 Accuracy of straight thread - Grade H in GB/T 197

6 Test method