1 Scope
This International Standard specifies a method of determining:
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a) the compressive strength and corresponding relative deformation,
or
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b) the compressive stress at 10 % relative deformation,
and
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c) when desired, the compressive modulus of rigid cellular plastics.
There are two procedures:
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— Procedure A employs crosshead motion for determination of compressive properties. Procedure A is intended to be used when compressive stress at 10 % relative deformation has to be determined.
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— Procedure B employs strain measuring devices mounted on the specimen (contact extensometer) or similar device which measures directly sample deformation. Procedure B is intended to be used when compressive modulus has to be determined.
NOTE Compressive strength (at maximum load) can be determined either with Procedure A and B.