Many changes in testing requirements
Site thickness measurement
At least 12 points should be taken from the test site
After selecting test points as required
Place the three needle thickness gauge on the test point
Hand held professional thickness gauge vertically downward
Press to the moving ground until the surface of the foundation layer stops
The value displayed on the professional thickness gauge is the thickness
Breaking force test of straw
Choose 5 tufts of grass from the same line
Choose one from each cluster
The test was carried out on a tensile machine with an accuracy of 1n
The test speed was (250 ± 50）mm/min
Select 5 samples for test and take arithmetic mean value
If the error between a certain test and the arithmetic mean exceeds 30%
The sample test is invalid
Aging resistance
Here is the change item
Compared with the old national standard
Test duration of new national standard
Increase to 500h
type inspection
The type inspection items are
5.2 thickness
5.3 physical and mechanical properties
5.4 synthetic material surface
Aging resistance of artificial climate
5.5 in synthetic surface course
Inorganic filler and polymer content
5.6 finished products and raw materials of synthetic material surface
Limit of harmful substances and odor
The inspection regulations are shown in the figure above
One of them needs to be paid great attention to:
Once a year during normal production or construction
Sampling requirements
The type inspection items are
5.2 thickness
5.3 physical and mechanical properties
5.4 synthetic material surface
Aging resistance of artificial climate
5.5 in synthetic surface course
Inorganic filler and polymer content
5.6 finished products and raw materials of synthetic material surface
Limit of harmful substances and odor
The inspection regulations are shown in the figure above
One of them needs to be paid great attention to:
Once a year during normal production or construction
Sampling requirements
Increased
Deal with the raw materials for each entry
Raw material selection of the same batch with unified specifications
Each group of non solid raw materials shall not be less than 250ml
Multi component non solid raw materials are sampled according to the proportion
The minimum component of proportioning should not be less than 50ml
The sample block of artificial grass surface course shall not be less than
300mmx400mmx actual thickness
——To be continued——
In this issue, we share the chemical requirements
So, combined with the physical properties described before
Detection of physical and chemical properties in new national standard
What has changed
What kind of requirements do you have
New national standard testing requirements
Coming soon, please look forward to it