GB/T 21149-2019 in English

VALID

Fired roofing tiles

Issued on:2019-08-30
Implemented on:2020-07-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
$243.00

Standard No:	GB/T 21149-2019
Document status:	VALID
Title in English:	Fired roofing tiles
Title in Chinese:	烧结瓦
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2019-08-30
Implemented on:	2020-07-01
Superseding:	GB/T 21149-2007 Fired roofing tiles
ICS Classification:	91.100.25-Ceramic building products
Chinese Classification:	Q17-Roof and pavement waterproof and barrier material
Professional Classification:	GB-National Standard
Related Keywords:	fired roofing tiles introduction interpretation sintered tiles flat tiles three-curved tiles double-barreled tiles
Related Topics:	Pre-sintering temperature pi sintering Sintering parameters Sintered sheet structure GBT21149 GB/T 21149-2007 GB/T 21149-2019 Sintered Sintered tile gb21149 gb/t 21149 gbt21149-2019

《GB/T 21149-2019烧结瓦》由TC285（全国墙体屋面及道路用建筑材料标准化技术委员会）归口，主管部门为中国建筑材料联合会。

Introduction

Interpretation of GB/T 21149—2019, the National Standard of the People's Republic of China

Background and Significance of the Standard

As an important material for building roofs, the quality of sintered tiles directly affects the durability and aesthetics of buildings. GB/T 21149—2019 replaces the old version GB/T 21149—2007, and has made important updates mainly in classification, performance requirements and test methods.

This standard was proposed by the China Building Materials Federation and is applicable to sintered tile products used for building roof covering and decoration. The background of its formulation is to meet the demand of the construction industry for high-performance roofing materials and to optimize it in combination with the latest technological developments.

Comparison of main changes

Old version GB/T 21149—2007	New version GB/T 21149—2019
Unclear classification requirements	Added definition and requirements for flat tiles
Low bending resistance index	Increase the bending resistance index of three-curved tiles, double-barreled tiles to not less than 10.0 MPa
Lack of quick freezing method and salt resistance test	New quick freezing method, salt resistance and acid and alkali resistance test methods

Detailed interpretation of the standard

1. Classification and labeling

Based on the shape, surface state and water absorption rate, sintered tiles are divided into multiple categories and grades:

Flat tile: Common roof laying type, with high bending resistance.
Ridge tile: Used on the edge of the roof, requiring higher wind and frost resistance.
Triple curved tile: Due to its special curved shape, it is suitable for different architectural styles.

The marking method is: Variety-Grade-Specification-G Standard Number, for example: Green tile IA 180×180 GB/T 21149—2019

2. Dimensional tolerance and appearance quality

Dimensional tolerance is divided into multiple grades according to product specifications, with a maximum deviation range of ±6 mm (qualified products). Appearance quality requirements include no obvious defects such as glaze loss, cracks and color difference.

Product Category	Superior Product	Qualified Product
Flat Tile	±4 mm	±5 mm
Ridge Tile	±3 mm	±4 mm

3. Physical Performance Requirements

Physical properties include water absorption, bending resistance, frost resistance and salt resistance:

Water absorption: Class I tile ≤6.0%, Class II tile 6.0%~10.0%, Class III tile 10.0%~18.0%
Bending resistance: Flat tile ≥1200 N, three-curved tile ≥10.0 MPa
Frost resistance: No obvious damage after 15 cycles of slow freezing method and 100 cycles of fast freezing method
Salt resistance: After 40 cycles, the weight loss of the sample is ≤0.4g

4. Test methods and inspection rules

The test methods follow GB/T 3810.1 and GB/T 9195, including sampling, dimensional deviation test and physical performance test. The inspection rules are divided into factory inspection and type inspection to ensure that the product quality meets the standard requirements.

Suggestions for the implementation of the standard

Manufacturers should establish a sound quality management system and strictly follow the standard for production and inspection.
Architects should choose the appropriate type and grade of tiles according to the specific project requirements when selecting materials.
Construction parties should follow the installation requirements in the standard to ensure the quality and durability of roofing.

More samples: JGJ 94-2008 JJG 21-2008 NB/T 47013.2-2015

Sample only — not a preview of GB/T 21149-2019