Admixtures for concrete, mortar and grout - Admixtures for masonry mortar. Definitions, requirements, conformity and marking and labelling Ingestion-build-83346 a) the transmissions of audio

a) the transmissions of audio frequency vibrations to a structure that can

this part of BS ISO/IEC 29794:

Communications engineers

EN 60728-101

the intended use

Admixtures for concrete, mortar and grout - Admixtures for masonry mortar. Definitions, requirements, conformity and marking and labelling Ingestion-build-83346 a) the transmissions of audio1 Scope This European Standard defines and specifies the requirements and conformity criteria for admixtures for use in cement based masonry mortar. It covers two types of admixtures, long term retarding and air entraining plasticising which are used in ready mixed and site made masonry mortars. Provisions for the use of admixtures for masonry mortar are not part of this European Standard but are covered by EN 9981 and EN 9982.