Standard No.:	GB 25779-2010
English Name:	Loadbearing concrete perforated bricks
Chinese Name:	承重混凝土多孔砖
Chinese Classification:	Q14    Concrete product
Professional Classification:	GB    National Standard
ICS Classification:	91.100.30 91.100.30    Concrete and concrete products 91.100.30
Source Content Issued by:	AQSIQ; SAC
Issued on:	2010-12-23
Implemented on:	2011-6-1
Status:	valid
Superseded by:	强制性推荐性标准 其文本不做任何
Target Language:	English
File Format:	PDF
Word Count:	5000 words
Translation Price(USD):	120.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the terms and definitions, specification, grade, marking, material, technical requirement, test method, inspection rule, product qualification certificate, stacking and transportation of loadbearing concrete perforated brick. This standard is applicable to concrete perforated bricks used in loadbearing structures like industrial and civil buildings. 2 Normative References The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments to (excluding amending errors in the text), or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of the normative document is applicable. For undated references, the latest edition of the normative document applies. GB 175 Common Portland Cement GB/T 1346 Standard Test Methods for Water Requirement of Normal Consistency, Setting Time and Soundness of the Cements GB/T 1596 Fly Ash Used for Cement and Concrete GB/T 2542 Test Methods for Wall Bricks GB/T 4111 Test Methods for the Small Concrete Hollow Block GB 6566 Limit of Radionuclides in Building Materials GB 8076 Concrete Admixtures GB/T 14684 Sand for Building GB/T 14685 Pebble and Crushed Stone for Construction GB/T 17431.1 Lightweight Aggregates and Its Test Methods - Part 1: Lightweight Aggregates GB/T 17669.3 Gypsum Plasters - Determination of Mechanical Properties GB/T 17671 Method of Testing Cements - Determination of Strength GB/T 18046 Ground Granulated Blast Furnace Slag used for Cement and Concrete GB/T 18968 Terms of Wall Materials JGJ 63 Standard of Water for Concrete YBJ 20584 Technical Specification for Crushed Air-cooled Blast Furnace Slag for Concrete 3 Terms and Definitions For the purposes of this standard, the terms and definitions specified in GB/T 18968 and those listed below apply. 3.1 Loadbearing concrete perforated brick Perforated bricks (hereinafter referred to as concrete perforated brick with code of LPB) mainly made from cement, sand and stone through dosing, stirring, molding and curing and used in load-bearing structures.

Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Specification, Grade and Marking 5 Materials 6 Technical Requirements 7 Test Method 8 Inspection Rule 9 Qualification Certificate, Stacking and Transportation Appendix A (Normative) Compressive Strength Test Method for Concrete Perforated Brick Appendix B (Normative) Carbonization Coefficient Test Method for Concrete Perforated Brick Appendix C (Normative) Softening Coefficient Test Method for Concrete Perforated Brick