EN 14956:2005 – Surfaces for sports areas – Determination of water content of unbound mineral surfaces for outdoor sports areas
1 Scope
This European Standard specifies a method for the determination of the water content of unbound mineral surfaces used for outdoor sports areas.
2 Principle
The mass of a specimen of an unbound mineral is determined under the prevailing conditions. After drying,the mass of the same specimen is determined again. The difference in mass is a measure of the water content.
3 Apparatus
3.1 Conventional oven, capable of being set at (105 ± 5) °C.
3.2 Balance, capable of measuring to within 0,1 g.
3.3 Desiccator.
4 Test specimen
Prepare a specimen having a mass of at least 1 000 g.
5 Test conditions
The test shall be carried out at a temperature of (23 ± 2) °C and a relative humidity of (50± 10) %.
6 Procedure
6.1 Determine the mass of the test specimen (M A ).
6.2 Dry the specimen for at least 24 h in the oven (3.1) at (105 ± 5) °C. Remove the specimen from the oven and allow the specimen to cool down in the desiccator (3.3) for at least 4 h. Re-weigh the specimen (M B ).
6.3 Place the specimen in the oven for at least 4 h. After a second cooling down period in the desiccator for at least 4 h, weigh the specimen again (M C ).
6.4 Repeat 6.3 until two successive masses are within ± 0,05 g. Record this mass, M D , as the mass of the dry specimen.
7 Expression of results
Calculate the water content of the specimen, expressed as a percentage, using the following formula:
where
M A is the mass of the specimen, expressed in grams;
M D is the mass of the dry specimen, expressed in grams.
8 Test report
The test report shall include the following information:
a) reference to this European Standard, i.e. EN 14956:2005;
b) description of the nature of the specimen (M A , M B , M C , M D );
c) water content of the specimen, expressed as a percentage by mass to the nearest whole number.
EN 14956:2005 – Surfaces for sports areas – Determination of water content of unbound mineral surfaces for outdoor sports areas