BS EN ISO 844:2014

1   Scope This International Standard specifies a method of determining:

       a)  the  compressive strength  and corresponding  relative deformation , 
   
 

or

       b)  the  compressive stress at 10 % relative deformation , 
   
 

and

       c)  when desired, the compressive modulus of rigid cellular plastics. 
   
 

There are two procedures:

       —  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. 
   
   
     
       —  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 s...