ČSN EN 1426

This document specifies a method for the determination of the needle penetration of bitumens and bituminous binders. The standard procedure for the determination of the needle penetration (consistency) is described for penetrations up to (330 x 0,1) mm at a temperature of 25 °C. The method also allows for penetrations up to (500 x 0,1) mm using a longer needle. WARNING - The use of this document can involve hazardous materials, operations and equipment. This document does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.