Admixtures are formulated products that are added in small amounts to concrete, mortar or grout during the mixing process in order to modify the concrete properties in the plastic and / or hardened state.

The CAA is a Trade Association founded in 1963 and representing all the main UK admixture manufactures. CAA members are committed to offering the highest standards of product quality and support to their customers.

About Admixtures

CAA Full and Associate Members

The CAA has two types of membership: Full and Associate. We have a full list of members of both types available to view.

Find Out More
CAA Publications

Admixture EPDs to EN 15804

The CAA has cooperated with EFCA to produce 6 Generic or Model EPD conforming to the requirements of EN 15804 covering the main admixture types supplied in the UK

Find Out More
CAA Members

Admixture Environmental and Sustainability Information

CAA members are committed to meeting the highest standards of environmental and sustainable responsibility and to the responsible sourcing of the constituents used in admixture manufacture.

Find Out More

Admixture Standards

BS EN 934 is the Harmonised European Standard – ‘Admixtures for concrete, mortar and grout’. BS EN 934 is split into 6 parts.

Find Out More

CAA Publications

The CAA publishes an extensive range of documents to support the use of admixtures in concrete. All publications are freely available to download.

Go to Downloads

The CPR, Admixture CE Marking and DOP

Construction Products Regulation, CE Marking and Declaration of Performance

Find Out More

Our Members: