GB/T 14833-2020Synthetic materials sports field surfaces (English PDF)

1 Scope

GB/T 14833-2020 is the Chinese national standard on synthetic materials sports field surfaces, in the field of rubber and plastic industries. The /T suffix marks it as a recommended standard: it is not compulsory by itself, but it becomes binding as soon as a contract, a tender or a customer specification calls it up - which in practice is how most foreign buyers meet it. It was issued on 31 March 2020 by the State Administration for Market Regulation; Standardization Administration of China, and has been in force since 1 February 2021. Classification: ICS 83.140.99, CCS G47. This page is published from the official record of the standard held by the Chinese standards administration: the identification, the dates, the classification and the issuing body are taken from there. The clause text, the tables and the numeric limits are in the document itself, which is delivered complete in English translation.

This standard specifies the terms and definitions, product classification, requirements, test methods, inspection rules, site foundation requirements, surface construction conditions for the surfaces of synthetic material sports fields (hereinafter referred to as the surface). This standard is applicable to the surface of track and field, ball games and multi- purpose sports fields, which are laid with synthetic materials outdoors. This standard does not apply to occasions where climbing, sitting, lying are required.

2 Normative references

The following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard.

GB/T 529 Rubber, vulcanized - Determination of tear strength (trouser, angle and crescent test pieces)

GB/T 2941 Rubber - General procedures for preparing and conditioning test pieces for physical test methods

GB/T 10654 Flexible cellular polymeric materials - Determination of tensile strength and elongation at break

GB/T 16422.2-2014 Plastics - Methods of exposure to laboratory light sources - Part 2: Xenon-arc sources

GB/T 19995.2-2005 Technical requirements and test methods for natural material sport fields - Part 2: Wooden floor for multipurpose gymnasium

GB/T 20033.2 Technical requirements and test methods for artificial material sports fields - Part 2: Tennis court

GB/T 20033.3 Technical requirements and test methods for artificial material sport fields - Part 3: Artificial turf surface for football fields

GB/T 30314 Rubber or plastic-coated fabrics - Determination of abrasion resistance - Taber abrader

GB 36246-2018 Sports areas with synthetic surfaces for primary and middle schools

GB 50268 Code for construction and acceptance of water and sewerage pipeline works CJJ

1 Code for construction and quality acceptance of road works in city and town Athletics field facilities standard manual (IAAF)

3 Terms and definitions

The following terms and definitions apply to this document.

3.1 Surface layers of athletic fields A track-and-field surface layer, which is laid with synthetic material.

3.2 Surface layers of sports field for ball games Court floors, which are made of synthetic materials, for basketball, volleyball, badminton, tennis, football.

3.3 Synthetic surfaces intended for multi-sports facilities Surface layers for recreational fitness activities, which are made of synthetic materials.

3.4 Permeable surface A synthetic material sports surface layer, which has a pore structure, AND on which the water is in the form of both surface runoff and permeable surface flow.

3.5 Non-permeable surface A synthetic material sports surface, which has a dense structure AND on which the water on the surface is only in the form of surface runoff.

3.6 Prefabricated surface A synthetic material sports surface layer, which is made by using adhesives or other methods, to lay the surface layer material, on the foundation.

3.7 In-situ casting surface A synthetic sports surface, which is formed by casting in site and paving the factory- produced prepolymers and other raw materials.

4 Product categories

4.1 The surface layer is divided into the following three categories, according to its scope of application: - The surface layer of the athletic field; - The surface layer of sports field for ball games; - The synthetic surfaces intended for multi-sports facilities.

4.2 The surface layer is divided into the following two categories, according to its structure type: - Permeable surface layer; - Non-permeable surface layer.

4.3 The surface layer is divided into the following two categories, according to its paving method: - In-situ casting surface layer; - Prefabricated surface layer.

6 Test methods...

7 Inspection rules...

8 Site foundation requirements and surface construction

8.1 The technical requirements for the infrastructure and structures of the sports venues shall be implemented, in accordance with the relevant technical requirements of "Urban expressway and trunk road" in CJJ 1. The technical requirements, for the supporting water supply and drainage pipeline engineering, shall be implemented in accordance with GB 50268. Among them, for the indicators such as flatness, slope, site size, if they belong to track and field venues, it shall be implemented in accordance with the "Standard manual of track and field venue facilities"; if they belong to other sports venues, it shall be implemented in accordance with the corresponding professional sports technology requirements, AND clearly indicated in the contract.

8.2 Before the construction of the surface layer, the asphalt concrete site shall be naturally cured for more than 28 days. The cement concrete site shall be naturally cured, for more than 7 days, after the moisturizing curing period expires.

8.3 The construction of the surface layer shall be closed and enhanced bonding treatment, according to the conditions of the base layer, to ensure the quality of the surface layer of synthetic materials.

8.4 The construction shall avoid rainy days and weather which has a wind force above grade 5. The temperature should be within 10 °C ~ 35 °C. The ground shall be dry.

8.5 Surface construction should not be carried out, when large-scale decoration works are carried out nearby OR there is significant environmental pollution.

c) The diameter of the coil spring is (69 ± 1) mm, which has a hard quenched upper plate. In the range of

0.1 kN ~

7.5 kN, it has a linear stiffness of (2000 ± 60) N/mm. The spring shall consist of 3 or more coaxial coils, which are fixed together at the ends. This spring may also be milled from the same piece of steel.

d) Steel force measuring bench: its bottom surface is spherical curved surface; the radius is 500 mm; the edge chamfering radius is 1 mm; the diameter of the force measuring bench is (70.0 ± 0.1) mm; the thickness is not less than 10 mm.

e) Base sleeve: the inner diameter is (71.0 ± 0.1) mm.

f) Test feet: It consists of steel force measuring bench, force sensing device, spring, upper plate (minimum thickness 20 mm, based on the measurement value at the center of the plate); it is placed in the base sleeve; the total mass of the test feet is (3.5 ± 0.35) kg.

g) Weight lifting and releasing device: It can make it fall from the set height; the error is not more than ±

0.25 mm.

h) A device, which has means for regulating and recording the output signals of the force senser AND means for displaying these recordings.

Appendix E

(Normative) Testing method of flame retardancy E.1 Scope of application This method is suitable for judging the flame retardancy of the surface layer of the horizontal synthetic material sports field, under the action of moderate flame. E.2 Class-I flame retardancy Indicates that under the action of flame, when the combustion is extinguished, the diameter of the burning plaque, which is left on the surface of the synthetic material, is less than or equal to 50 mm. E.3 Preparation of specimen The specimens shall be cut from different positions of the test object. The specimen size is 100 mm × 100 mm. Generally, 5 specimens shall be measured for each test. Before the test, the specimen shall be standing for at least 48 h, under standard laboratory conditions. E.4 Instruments and reagents E.4.1 A fiber layer disc composed of overlapping cotton fiber fabrics, which have a diameter of 25 mm (e.g.: thin cotton cloth). E.4.2 Ethanol, which has a concentration of 96%. E.4.3 A graduated cylinder, which has a capacity of 10 mL or a

2.5 mL pipette. E.4.4 Air-dried wood planks, which have a thickness of 20 mm, at least same as the size of the specimen. E.4.5 Steel ruler, which has an accuracy of

0.5 mm. E.5 Determination steps The test shall be carried out in a non-ventilated place. In the middle of the specimen is placed a disc of overlapping fiber layers, which have a mass of

0.8 g. The fiber layer disc is soaked evenly, in