BS/EN 15306-2014 pdf download.Surfaces for outdoor sports areas – Exposure of synthetic turf to simulated wear.
This BS/EN 15306 specifies a method for conditioning synthetic turf and needle-punch surfaces by simulating interaction between a sports shoe and sports surface, to allow changes in appearance and to allow sports functional characteristics to be measured.
NOTE The method specified is commonly known as the Lisport method.
2 Principle
A test piece is laid on a metal support,
Two cylinders equipped with studs move linearly along the surface of the test piece. The two cylinders roll on the surface and a mechanical system between the cylinders causes a sliding movement of one of the cylinders. Depending on the configuration of the machine, the support might have a movement transverse to the linear movement of the cylinders.
3 Apparatus
3.1 Wear simulator
Comprised of two cylinders, each having a length of at least 300 mm and a diameter without any test profile of (118±5) mm (see Figure 1).
One roller shall rotate at a circumferential speed as close as possible to the speed of the carriage (allowing for frictional losses). The second roller shall rotate 40 ± 3 % slower than the first. The rollers shall be mounted so the roller rotating more slowly is the leading roller (the first to contact the sample).
NOTE I The ratio of rollers speeds can be obtained using gear ratios of 1:1 15.
The linear speed for each cycle of movement, to and fro, shall be (0,25 ± 0,05) m/s. A mechanical system to count the number of cycles shall be provided. The wear simulator shall be arranged so that interrupted movement. i.e. the cylinders stop rotating, slip and then start rotating again (slip stick), is avoided. To avoid studs continually impacting the same spots. free movement of the cylinders shall occur at the end of a cycle. or the slip shall change from time to time within the tolerances of the ratio of rotation andlor transverse movement of the sample tray shall occur. When transverse movement occurs the distance travelled during each cycle of transverse movement shall be (20 ± 1) mm at a speed of (0,015 ± 0.005) rn/s.
Mounted to the rollers shall be a test sole as specified in the product specification.
The standard studded test sole shall be comprised of (145 ± 5) studs1). The studs shall be as shown in Figure 3, be manufactured from plastic and have a Shore A hardness of (96 ± 2). The mass of the roller all the gears and chains that contribute to the load on the sample (28 500 ± 500) g for a 300 mm wide roller. If wider rollers are used the mass shall be increased proportionally.
The studs shall not be mounted linearly on the cylinders but shall be mounted so that the studs and their movement form a low frequency sine wave, to ensure that the wear area of the sample is uniform. Their pattern of the studs shall be as shown in Figure 2. The location of the mounting positions of each stud shall be as detailed in Table 1.
NOTE 2 A manufacturing tolerance of ± 1 mm for the stud positions has been found satisfactory.
3.2 Stud inspection and replacement
After every 20 tests, the length of the 15 studs removed at random from the rollers shall be determined. The mean length and the standard deviation of the 15 studs shall be calculated, and if the mean length is less than 11,0 mm, the standard deviation is more than 0,5 or any one stud has a length of less than 10mm, all of the studs on both rollers shall be replaced.
4 Test pieces
The dimension of the test piece shall be a minimum of 800 mm x 400 mm The uniform abraded surface shall be at least 500 mm x 300 mm.
5 Procedure
5.1 Conditioning
Condition the test piece for 24 h at a temperature of (23 ± 2) °C.
5.2 Test
Mount the test piece into the sample tray and fill it (if applicable) in accordance with the manufacturer’s instructions,
Place the prepared test piece in the wear simulator (3.1) and adjust the height of the rollers to ensure full stud contact with the infill layer or carpet pile. The height of the rollers shall ensure the rollers remain fully in contact with the infill layer throughout the test.
On vertically free moving rollers a clearance gap of approximately 2 mm from the base of the roller carnage slot should be used.
Undertake the number of cycles given in the relevant specification.BS/EN 15306-2014 pdf download.