GB/T 27972—2011 National standards for hanging hollow ceramic plates

Foreword:

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

Please note that some of the content of this standard may involve patents. The issuing authorities of this standard do not assume responsibility for identifying these patents.

This standard is proposed by China Federation of Building Materials.

This standard is under the jurisdiction of the National Building Sanitary Ceramic Standardization Technical Committee (SAC/TC249).

This standard was drafted by: Fujian Huatai Group Co., Ltd., Xianyang Ceramic Research and Design Institute, Huayuan Fengjisha Development Co., Ltd., Ningxia Black Gold New Building Material Co., Ltd., Foshan Modena Machinery Co., Ltd., and Xiangtan Weida Electromechanical Manufacturing Co., Ltd.

The main drafters of this standard: Wu Guoliang, Liu Ximin, Lu Yawen, Chen Yibo, Xiong Liang.

This standard is the first release.

Dry hanging hollow ceramic plate 1 range:

This standard specifies the terms and definitions, classification, technical requirements, test methods, inspection rules, markings and operating instructions for dry-hanged hollow ceramic plates.

This standard applies to dry hanging hollow ceramic plates used in architectural decoration.

2 Normative references:

The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest edition (including all amendments) applies to this document.

Test methods for GB/T3810.1 ceramic tiles Part 1: Sampling and receiving conditions GB/T3810.2 Test methods for ceramic tiles Part 2: Inspection of dimensions and surface quality GB/T3810.3 ceramic tile test methods Part 3: Water absorption Determination of apparent porosity, apparent relative density and bulk density GB/T 3810.4 Test methods for ceramic tiles Part 4: Determination of modulus of rupture and breaking strength GB/T 3810.5 Test methods for ceramic tiles Part 5: Recovery Determination of impact resistance of bricks GB/T3810.8 ceramic tile test methods Part 8: Determination of linear thermal expansion GB/T3810.9 Ceramic tile test methods Part 9: Determination of thermal shock resistance GB/T 3810.12 ceramic tiles Test methods - Part 12: Determination of frost resistance - Test methods for ceramic tiles GB/T 3810.13 - Part 13: Determination of chemical corrosion resistance - Test methods for ceramic tiles GB/T 3810.14 - Part 14: Determination of resistance to soil contamination GB / T9195 ceramic tile and sanitary ceramics classification and terminology GB/T13475 determination of adiabatic steady state heat transfer properties calibration and protection hot box method 3 Terms and Definitions:

The following terms and definitions as defined in GB/T 9195 apply to this document.

3.1 Dry hanging dry-hanging

An abbreviation for a construction method in which a metal plate is used to hang a plate firmly on a structure to form a veneer.

3.2 Hollow ceramic plate hollow ceramic slab

It is made of clay and other inorganic non-metallic raw materials through processes such as kneading, extrusion molding and firing. It is used as a decorative hollow slab ceramic product.

3.3 positive frontside

Visible decorative surface installed on the building.

3.4 effective width validwidth

Single product front width (w), see Figure 1.

3.5 Carrying capacity Thickness of loadparts

The partial wall thickness (h) of the single product bearing capacity is shown in Figure 1.

Fig.1 Schematic diagram of the wall thickness of the effective width and bearing capacity a)H=18mm The effective width of the board and the wall thickness of the bearing capacity b)H=30mm The effective width of the board and the wall thickness of the bearing capacity

4.1 According to the surface characteristics of dry hanging hollow ceramic plate:

a) unglazed dry hanging hollow ceramic plates;

b) There is a dry glazed hollow ceramic plate.

4.2 Dry-hanging hollow ceramic plate water absorption (E) Classification:

a)E≤0.5% Porcelain dry hanging hollow ceramic plate;

b) 0.5%

5 requirements:

5.1 The effective width (W) of dry hanging hollow ceramic plates should not be greater than 620mm. The length is negotiated by the supply and demand sides. Dry hanging hollow ceramic plates of special shape or size are agreed upon by the supply and demand sides.

H≤18mm dry hanging hollow ceramic plate, h≥5.5mm.

18mm

5.2 Dimensional Permissible Deviation The average size of each plate of dry-hanging hollow ceramic plates relative to the working size shall be in accordance with Table 1.

5.3 Main surfaces of dry-hanged hollow ceramic plates with a surface quality of at least 95% have no obvious defects.

5.4 Physical properties The physical properties of dry-hanged hollow ceramic plates are to comply with the requirements of Table 2.

5.5 Chemical properties The chemical properties of dry-hanged hollow ceramic plates are to comply with the requirements of Table 3.

6 Test methods 6.1 Allowable size deviation According to GB/T3810.2 regulations.

6.2 surface quality according to GB/T3810.2 regulations. Diagonal length difference is measured using a steel tape measure with a graduation of no more than 1 mm.

6.3 Physical properties 6.3.1 water absorption According to GB/T3810.3 regulations.

6.3.2 Destruction strength According to GB/T3810.4 regulations. Dry hanging hollow ceramic plates are cut into lengths of 600mm for inspection; dry hanging hollow ceramic plates with length less than 600mm are tested according to the actual size. When testing, the direction of the support bars is perpendicular to the direction of the holes in the hollow ceramic plate .

6.3.3 Impact resistance According to GB/T3810.5 regulations.

6.3.4 linear thermal expansion coefficient According to GB/T3810.8 regulations.

6.3.5 Thermal shock resistance According to GB/T3810.9 regulations.

6.3.6 frost resistance According to GB/T3810.12 regulations. The dry hanging hollow ceramic plate is tested to be placed in water and the plate is perpendicular to the ground and the hole is parallel to the ground.

6.3.7 heat transfer coefficient According to GB/T13475 regulations.

6.4 Chemical properties 6.4.1 Chemical resistance according to GB/T 3810.13 regulations.

6.4.2 surface contamination resistance According to GB/T 3810.14 regulations.

7 Inspection Rules 7.1 Inspection Classification Inspection is divided into factory inspection and type inspection.

7.1.1 Factory Inspection Factory inspection includes surface quality, dimensional tolerances, water absorption, and failure strength.

7.1.2 Type inspections Type inspections include all the technical requirements of Chapter 5 of this standard. Under normal production conditions, it shall be conducted at least once a year; if one of the following circumstances occurs, a type inspection shall be conducted.

a) Test-type identification of new or old products transferred to the factory;

b) After the formal production, if the product structure, materials, and processes are greatly changed, the product performance may be affected;

c) The product is discontinued for more than half a year and resumed production;

d) When the factory inspection result is significantly different from the last formal inspection.

7.2 Batch approval rules and sampling plans 7.2.1 Batch approval rules The same product varieties, same specifications, and same quality product batches produced by the same manufacturer shall be approved for each batch of 2000m2. Less than 2000m2 is still counted in batches.

7.2.2 Sampling plan According to GB/T3810.1 regulations.

7.3 Judgment rules All items are inspected. If all the items in the inspection are qualified, the batch of products is judged as qualified. If there is one or more unqualified items, re-sampling will be carried out for testing. If one or more items are still unqualified, the batch of products is judged to be unqualified.

8 Marks, User Manual 8.1 Marking Products should be clearly marked. The packing box should have the company's name and address, product name, trademark, specifications, quantity, production date, and execution standard number.

When the product leaves the factory, it should provide product quality certification.

The product quality certificate mainly includes the certificate number, the production date, and the inspection department and the inspector's signature.

8.2 Operating Instructions For ease of use, the supplier shall provide instructions for dry hanging hollow ceramic plates, describing on-site construction methods and requirements.

Dry-hanging hollow ceramic slab (approved draft)

December 31, 2011 Released October 2012 1 Implementation of the People's Republic of China State Administration of Quality Supervision, Inspection and Quarantine, China National Standardization Administration