Test specimens with artificial grass sports Sampling intercept method

Test specimens with artificial grass sports Sampling intercept method

A range
Different samples taken when the foot is fully representative of the population, artificial grass sampling method will be parties agreed upon.
2, the principle
For the selected sample and select from these samples as representative of this group of products and provision Metaplexis stauntoni sample program.
3, the program
I select the sample width should be selected along the entire product sample, but the production process does not include any portion of the normal to be cut.
2, the interception of the sample
1, the sample may be square or rectangular, cross section should be parallel and perpendicular to the longitudinal and transverse edges of the sample, have been laid on site, should be parallel or perpendicular to the field edge.
2, the sample taken at least from the edge 100.
3, if the sample to be taken more than one piece of the sample, these samples should be uniformly dispersed arrangement of, and the available sampling K domain as distant from the sampling, and that (in the structure allows case) distribute in each sample of the longitudinal and lateral position of nj.
4, the sample test specimens should be widely distributed throughout the available sampling K region; when the majority of the sample taken, they should be evenly distributed in the sample.
5, if the sample needs to be done several tests, the sample taken on the sample may be distant Square distribution, for example, on a table of random numbers marked on the web K at position practice.
6, in the laying of venue has been sampled, we must fully consider the different [X: field sampling, determined through consultation by the parties concerned.
Annex B (normative)
Wire grass with artificial grass sports pull-out test methods
1, the principle
Use clamps grip the single cluster of wire grass, Nukiyama up from fabric and pull Nukiyama recorded during the most vigorous values.
2, equipment
1, the tensile testing machine accuracy is not less than 1N.
2, the clamping fixture test device holding portion holding the minimum sample size of 50
3, the sample preparation
Cut in different regions to take five samples, each sample size is not Ding 60X60, corrected to 50X50, so gripping. 4, the test procedure
1, the specimen from the middle of the fold, so that a grass clusters in the highest position in the middle of the sample selected tuft of grass with a higher clamping fixture so that the grass and stretching direction parallel to the cluster.
2, the test speed (250 ± 50) / in, the whole fabric pulled from wire grass, record the maximum force values.