Standard No.:	GB/T 24492-2009
English Name:	Nonload bearing concrete hollow brick
Chinese Name:	非承重混凝土空心砖
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
Issued by:	AQSIQ, SAC
Issued on:	2009-10-30
Implemented on:	2010-4-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	5000 words
Price(USD):	120.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the terms and definitions, classification, general requirements, technical requirements, test methods, inspection rules, product qualification certificate, stacking and transportation of nonload bearing concrete hollow brick. This standard is applicable to concrete hollow bricks used in nonload bearing structures like industrial and civil buildings. 2 Normative References The following documents contain provisions which, through referenced in this text, constitute provisions of this standard. For dated reference, subsequent amendments (excluding the corrected contents) or any revisions of these publications do not apply. However, all parties coming to an agreement based on this standard are encouraged to study whether the latest edition of these documents applies. For undated references, the latest editions apply. GB 175 Common Portland Cement GB/T 1346 Test Methods for Water Requirement of Normal Consistency, Setting Time and Soundness of the Portland Cement 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 Limits of Radionuclides in Building Materials GB 8076 Concrete Admixtures GB/T 8170 Rules of Rounding off for Numerical Values & Expression and Judgement of Limiting Values GB/T 14684 Sand for Construction 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 The terms and definitions specified in GB/T 18968 and those listed below are applicable to this standard. 3.1 Nonload bearing concrete hollow brick Brick applied in regions of nonload bearing structure, using cement and aggregate as main material blending with admixture and other materials, the hollow ratio of which through dosing, stirring, molding, curing is not less than 25% (hereinafter referred to as hollow brick), the code is NHB. See Figure 1 for the name of each part of hollow brick. 1 - side face; 2 - bedding face (face with small thickness of outer wall and rib); 3 - top face (face with large thickness of outer wall and rib); 4 - top surface; 5 - length (L); 6 - breadth (B); 7 - height (H); 8 - outer wall; 9 - rib. Figure 1 Name of Each Part of Hollow Brick

Foreword I 1 Scope 2 Normative References 3 Terms and Definitions 4 Classification 5 General Requirements 6 Technical Requirements 7 Test Methods 8 Inspection Rules 9 Product Certificate, Stacking and Transportation Appendix A (Normative) Compressive Strength Test Method Appendix B (Normative) Carbonization Coefficient Test Method Appendix C (Normative) Softening Coefficient Test Method