BS EN 934 is the Harmonised European Standard – ‘Admixtures for concrete, mortar and grout’. It replaces BS 5075 and BS 4887, both of which are now withdrawn.
BS EN 934 is split into 6 parts:
- Part 1. Common requirements. Published 2008
- Part 2. Concrete admixtures. Published 2001, revised 2009, with amendment A1 2012.
- Part 3. Admixtures for mortar Published 2004, revised 2009, with amendment A1 2012.
- Part 4. Admixtures for grout Published 2001, revised 2009.
- Part 5. Admixtures for sprayed concrete Published 2005, revised 2007
- Part 6. Sampling, conformity control, evaluation of conformity, marking and labelling. Published 2001
Parts 1 and 6 are not a product standards but gives complementary information that is essential to the implementation of parts 2 to 5, to CE marking and to the provision of information to the customer.
New regulatory requirements for admixtures in concrete in contact with drinking water and on release of dangerous substances currently being drafted by the European Commission will eventually appear in EN 934 part 1.
BS EN 934 parts 2 to 5 are harmonised European standards and products conforming to all the requirements and to the requirements of BS EN934 parts 1 and 6 have to be CE marked in order to be placed on the market in most EU countries.
The CAA code of practice requires members to show conformity with EN 934 and includes a requirement for Initial Type Testing Certificates showing compliance with the Requirements of the relevant part of EN 934
Some admixtures are not covered by EN934 and further compliance information can be found on the next web page; Special purpose admixtures.
The test methods called up in EN 934 can be found in the EN 480 series of standards.