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This European Standard specifies a method for the determination of the efflux time (in seconds) of a bituminous emulsion at 85 °C using the Redwood No. II Viscometer. WARNING - The use of this European Standard can involve hazardous materials, operations and equipment. This European Standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this European Standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.