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GB/T 9263-2020 PDF in English


GB/T 9263-2020 (GB/T9263-2020, GBT 9263-2020, GBT9263-2020)
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GB/T 9263-2020: PDF in English (GBT 9263-2020)

GB/T 9263-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 87.040
G 50
Replacing GB/T 9263-1988
Determination of Slip Resistance of Anti-skid Coatings
ISSUED ON: NOVEMBER 19, 2020
IMPLEMENTED ON: OCTOBER 1, 2021
Issued by: State Administration for Market Regulation;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative References ... 5 
3 Terms and Definitions ... 5 
4 Principle ... 6 
5 Sample ... 6 
6 Preparation of Test Panel ... 6 
7 Materials and Instruments ... 7 
8 Test Procedures ... 8 
9 Calculation of Static Friction Coefficient of Anti-skid Coating Surface ... 10 
10 Expression of Results ... 11 
11 Test Report ... 11 
Determination of Slip Resistance of Anti-skid Coatings
1 Scope
This Standard specifies the test method of testing the slip resistance of anti-skid
coatings by using friction coefficient test device.
This Standard is applicable to the slip resistance test of a single coating or composite
coating system of anti-skid coatings in the laboratory. Field test may also take this
Standard as a reference.
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 3186 Paints, Varnishes and Raw Materials for Paints and Varnishes - Sampling
GB/T 6682-2008 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 9271 Paints and Varnishes - Standard Panels for Testing
GB/T 9278 Temperatures and Humidities for Conditioning and Testing of Paint
Specimens
GB/T 13452.2 Paints and Varnishes - Determination of Film Thickness
GB/T 20777 Paints and Varnishes - Examination and Preparation of Samples for
Testing
3 Terms and Definitions
The following terms and definitions are applicable to this document.
3.1 Slip Resistance
Slip resistance refers to the capability of reducing the risk of sliding between personnel
or equipment and the surface of the anti-skid coatings.
3.2 Static Friction Force
Static friction force refers to the force that an object receives from the horizontal plane
panels that are not cured under the conditions specified in GB/T 9278, before the test,
the test panels shall be conditioned for at least 16 h under the conditions specified in
GB/T 9278.
6.4 Thickness of Coating
The thickness of coating shall be specified or determined through negotiation. In
accordance with one of the methods specified in GB/T 13452.2, determine the
thickness of coating, which shall be expressed in (μm) or (mm).
7 Materials and Instruments
7.1 Materials
7.1.1 Aqueous medium: Grade-3 water that complies with the stipulations of GB/T
6682-2008.
7.1.2 Oil medium: varieties and specifications are determined through negotiation.
7.1.3 Silicon carbide sandpaper: No. 400.
7.1.4 Soft brush.
7.2 Instruments
The friction coefficient test device is used to test the force required to pull a sliding
block on the coated surface under test, as it is shown in Figure 1. The test device
includes:
---Spirit level.
---Tensile force meter: with a division value of 0.01 N; the maximum test load is
not less than 50 N.
---Vulcanized neoprene rubber pad: Shore A hardness is (57 ± 2) HA; the nominal
thickness is 3 mm.
---Sliding block: with a size of 145 mm  100 mm  22 mm. There is a screw hole
in the center of the arc edge of the steel block; a screw ring is fixed in the hole
for connection with the tensile force meter. The block body is glued with a layer
of vulcanized neoprene rubber pad to cover the two sides connected with the
arc edge and the arc edge. The total weight of the sliding block (including the
rubber pad and the screw ring) is (2.7 ± 0.2) kg, as it is shown in Figure 2.
---Fixing frame: located below the surface of the test panel to prevent the test panel
from sliding.
8.2 Processing of Sliding Block
Place No. 400 silicon carbide sandpaper (7.1.3) flatwise on a horizontal table. Along
the horizontal direction, pull the sliding block, so that the vulcanized neoprene rubber
pad on its surface moves about 100 mm on the sandpaper. Rotate the sliding block by
90° in the horizontal plane, then, repeat the above-mentioned polishing process for 4
times in total. The above steps constitute a complete process. Use the soft brush (7.1.4)
to remove the debris. If necessary, repeat the above-mentioned process, until the gloss
on the surface of the vulcanized neoprene rubber pad is completely removed.
8.3 Test of Static Friction Coefficient of Anti-skid Coating Surface
8.3.1 Test of static friction coefficient of dry-state surface
8.3.1.1 Conduct parallel test for 3 times.
8.3.1.2 Place the test panel on the test bench and fix it. Use the spirit level to test and
adjust the test bench to the level of the coating surface.
8.3.1.3 Place the vulcanized neoprene rubber pad of the sliding block downward on
the test surface of the test panel. Hang the hook of the horizontal tensile force meter
on the screw ring of the sliding block. Fix the test panel; maintain the pull rod of the
tensile force meter and the screw ring on the same horizontal line. Provide a horizontal
pulling force; record the first peak value of the sliding block after the sliding starts,
which is the static friction force. In addition, at a speed of 5 mm/s, maintain a uniform
linear motion; the displacement distance of the sliding block shall be not less than 25
mm.
8.3.1.4 On the test surface of each test panel, pull the sliding block for 5 times. After
horizontally rotating the test panel by 90°, conduct the test for 5 more times; record 10
readings of static friction force.
8.3.1.5 After the testing of a sample (3 test panels) is completed, replace a new
vulcanized neoprene rubber pad. In accordance with the requirements of 8.2, handle
the surface of the vulcanized neoprene rubber pad.
8.3.2 Test of static friction coefficient of wet-state surface
Before the test, use the aqueous medium (7.1.1) to wet the test surface of the test
panel and the surface of the vulcanized neoprene rubber pad of the sliding block;
repeat the steps of 8.3.1.1 ~ 8.3.1.5. Each test shall ensure that the surface of the test
panel is always wet.
8.3.3 Test of static friction coefficient of oil-lubricated surface
Before the test, use the oil medium (7.1.2) to wet the test surface of the test panel and
the surface of the vulcanized neoprene rubber pad of the sliding block; repeat the steps
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.