TS EN 934-2/A2

TS EN 934-2/A2 is an amendment to EN 934-2, the standard covering concrete admixtures within the broader family of admixtures for concrete, mortar and grout. This document is concerned with the definitions, requirements, conformity aspects, marking and labelling associated with concrete admixtures, so it supports how these products are identified and described in a technical and standardised way.

In general technical terms, chemical admixtures are ingredients added in small quantities to concrete to influence fresh or hardened properties such as workability, setting behaviour, water demand, strength development or durability-related performance. Different functional groups are commonly recognised in practice, including plasticisers, superplasticisers, retarders, accelerators and air-entraining admixtures. Standards in this area help keep terminology and product descriptions consistent across manufacturers, projects and test reports.

Definitions and conformity framework

The focus here is on how concrete admixtures are defined and what general requirements are associated with them. Conformity refers to assessing whether a product matches the declared class or stated characteristics, while marking and labelling support clear identification and correct use. As an amendment document, this listing relates to the parent standard’s subject matter, but it does not by itself replace or restate every clause of the base standard.

• Supports terminology and classification for concrete admixtures.
• Relates to the general requirements and conformity framework for these products.
• Promotes consistent marking and labelling of admixture products.
• Provides technical context for understanding how admixtures affect concrete performance.