JC/T 746-2023 English PDF

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JC/T 746-2023: (Concrete tiles)
Status: Valid

JC/T 746: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
JC/T 746-2023	599	Add to Cart	5 days	(Concrete tiles)	Valid
JC/T 746-2007	125	Add to Cart	Auto, < 3 mins	Concrete tiles	Obsolete
JC/T 746-1999	RFQ	ASK	3 days	Concrete tiles	Obsolete
JC/T 746-1987	RFQ	ASK	3 days	(Chinese Industry Standard)	Obsolete

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Basic data

Standard ID: JC/T 746-2023 (JC/T746-2023)
Description (Translated English): (Concrete tiles)
Sector / Industry: Building Materials Industry Standard (Recommended)
Classification of Chinese Standard: Q14
Classification of International Standard: 91.100.30
Word Count Estimation: 30,338
Date of Issue: 2023-12-20
Date of Implementation: 2024-07-01
Issuing agency(ies): Ministry of Industry and Information Technology
Summary: This standard specifies the structure and symbols, classification, specifications and markings, general provisions, requirements, test methods, inspection rules, signs, product quality certificates and instructions for use, packaging, storage and transportation of concrete tiles. This standard applies to concrete tiles for sloped roofs.

JC/T 746-2007 JC BUILDING MATERIAL INDUSTRY STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 91.100.30 Q 17 Registration number. 22914-2008 Replacing JC 746-1999 Concrete tiles 混凝土瓦 ISSUED ON. SEPTEMBER 22, 2007 IMPLEMENTED ON. APRIL 01, 2008 Issued by. National Development and Reform Commission of People’s Republic of China Table of contents Foreword ... 3  1 Scope ... 5  2 Normative references ... 5  3 Definitions, structures, symbols and abbreviations ... 6  4 Classification, specification and identification ... 13  5 General provisions ... 13  6 Requirements ... 14  7 Sampling ... 16  8 Test method ... 17  9 Inspection rules ... 19  10 Marking, product quality certificate and use manual ... 20  11 Packaging, storage and transportation ... 21  Appendix A (Normative) Detection method of appearance quality and allowable dimensional deviation... 23  Appendix B (Normative) Bearing capacity test method ... 27  Appendix C (Normative) Test method for thermal resistance and water absorption ... 32  Appendix D (Normative) Test method for impermeability ... 35  Appendix E (Normative) Test method for frost resistance ... 37  Appendix F (Informative) Inspection report format ... 39 

Foreword

This standard is the revision of JC 746-1999 “Concrete tiles”. The main changes in this standard as compared with JC 746-1999 are as follows. - REDEFINE the technical indicators and judgment rules of the bearing capacity; - ADD the thermal resistance performance and test methods; - ADD the technical indicators and test methods of the mass standard deviation; - ADD the provisions on the radionuclide limit of the concrete tiles as manufactured from industrial waste residue; - ADD the inspection report filling format; - SIMPLIFY the test methods of covering width; - CANCEL the provisions of dividing into three levels - excellent products (A), first class products (B), and qualified products (C) - based on the physical and mechanical properties; Appendix A, Appendix B, Appendix C, Appendix D, and Appendix E of this standard are normative appendixes, AND Appendix F is an informative appendix. This standard shall, from the date of implementation, replace JC 746-1999. This standard was proposed by China Building Materials Industry Association. This standard shall be under the jurisdiction of the National Standardization Technical Committee for Cement Products. The responsible drafting organizations of this standard. Liaoning Institute of Building Materials Science, Lafarge Roofing System (China) Limited. The participating drafting organizations of this standard. China Construction Northeast Design and Research Institute, Changzhou Huamei Building Materials Co., Ltd., Wuxi Fuji Colored Tiles Co., Ltd., Harbin Langen Colored Tiles Manufacturing Limited Liability Company, Shanghai Sheshanhong New Building Materials Co., Ltd., Quanzhou Qunfeng Machinery Manufacturing Co., Ltd., Liaoning Xinxin Group Building Materials Co., Ltd., Beijing Yipinhong Concrete tiles

Scope

This standard specifies the definition, structure, symbol, abbreviation, classification, specification, identification, general rules, requirements, sampling, test methods, inspection rules, marking, product quality certificate, instruction manual, packaging, storage and transportation of concrete tiles. This standard is applicable to concrete sloping roof tiles made of cement, fine aggregate, water, and other main raw materials through mixing, extrusion, hydrostatic molding, or other molding methods AND their matching concrete fitting tiles. The concrete tiles may be native tiles, colored tiles or surface treated tiles.

Normative References

The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable. For undated references, the latest edition of the referenced document applies. GB 175 Portland cement and ordinary portland cement GB 1344 Portland blast furnace slag cement, Portland pozzolana cement, and Portland flay-ash cement GB/T 1596 Fly ash used for cement and concrete GB/T 2015 White portland cement GB 6566 Limit for radionuclides in building materials GB 8076 Concrete admixtures GB 12958 Composite portland cement GB/T 14684 Sand for construction JC/T 539 Pigments used in concrete and mortar and their test method JC/T 870 Colored portland cement JGJ 63 Standard of water for concrete YBJ 205-1984 Technical requirements for blast furnace heavy crushed slag for concrete use 3 Definitions, structures, symbols and abbreviations The following terms and definitions apply to this standard. 3.1 Definition 3.1.1 Concrete tiles It is a general term of roofage tiles and fitting tiles made of concrete. 3.2.2 Concrete roofage tiles It refers to the building product made of concrete AND paved on the sloping roof to function as tiled roof together with the fitting tiles (shortly referred to as the roofage tiles). 3.1.2.1 Concrete roofage wavy tiles It refers to the tiles paved on the sloping roof, for which the cross section is in wave shape (shortly referred to as wavy tiles). 3.2.2.2 Concrete roofage flat tiles It refers to the tiles paved on the sloping roof, for which the cross section edge is in straight line shape (shortly referred to as flat tiles). 3.1.3 Concrete fittings tiles It refers to the building products made of concrete AND paved on the specific location of the sloping roof to satisfy the special functional Bx - Lower base width of the roofage tile for which the front projection is right angle trapezoidal, in millimeters (mm); b1 - Covering width of the roofage tile, in millimeters (mm); b2 - Overlap width of the roofage tile, in millimeters (mm); d - Ridge height of the roofage tile, in millimeters (mm); F - Bearing capacity, in Newton (N); F1, F2, F3, ... Fn - Measured bearing capacity value of single sample, in Newton (N); Fav - Measured average of the carrying capacity, in Newton (N); Favf - Measured average of the bearing capacity after freezing, in Newton (N); Fe - Standard value of bearing capacity, in Newton (N); Ff - Bearing capacity after freezing, in Newton (N); F1f, F2f, F3f - Measured value of bearing capacity of single roofage tile after freezing, in Newton (N); Fi - Measured value of bearing capacity of the ith tile, in Newton (N); L - Length of the roofage tile, in millimeters (mm); Lx - Length of the oblique side of the roofage tile for which the front projection is a right angle trapezoid, in millimeters (mm); Lz - Length of the right-angle side of the roofage tile for which the front projection is a right-angle trapezoid, in millimeters (mm); l - Hanging length of the roofage tile, in millimeters (mm), l = [(l1 x l2)/2]; l1 - Left hanging length of roofage tile at normal use, in millimeters (mm); l2 - Right hanging length of roofage tile at normal use, in millimeters (mm); mav - Measured average of mass, in grams (g); m1, m2, m3 ... mn - Measured mass of single sample, in grams (g); mb - The saturated mass of the sample, in grams (g); m0 - The dry mass of the sample, in grams (g); n - Number of samples, in pieces; W - Water absorption, %; σ - Standard deviation of bearing capacity, in Newton (N); σm - Standard deviation of mass, in grams (g). 3.4 Abbreviations English abbreviations of different kinds of concrete tiles are as follows. CT - Concrete tiles; CRT - Concrete roofage tiles; CRWT - Concrete roofage wavy tiles; CRFT - Concrete roofage flat tiles; CFT - Concrete fitting tiles; CST - Concrete ridge tiles; CUFT - Concrete unidirectional ridge tiles; CTST - Concrete three-way ridge tiles; CFDT - Concrete four-way ridge tiles; CFRT - Concrete flat ridge tiles; CSRT - Concrete slanting ridge head tiles; CDFT - Concrete patterned ridge tiles; CCT - Concrete cornice tiles; CCST - Concrete cornice sealing tiles; CCTT - Concrete cornice top tiles; CVT - Concrete ventilation tiles; CVPT - Concrete ventilation pipe tiles; CDT - Concrete drain tiles. 4 Classification, specification and identification 4.1 Classification Concrete tiles are divided into. concrete roofage tiles and concrete fitting tiles. AND the concrete roofage tiles are further divided into. roofage wavy tiles and roofage flat tiles. 4.2 Specifications The specifications of the concrete tiles are expressed ... ......

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