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1. General
1.1 Definition
An admixture is a product added in very small quantities to concrete, mortar or grout, before or during mixing. The dose is less than 5% of the cement weight.
The aim is to improve certain properties of concrete, whether in the fresh state during setting and hardening, or in the hardened state.
Additives are covered by the standard NF EN 934 Part 2 (Admixtures for concrete, mortar and grout. Definition – requirements – compliance – marking and labeling).
Each admixture, even if it has several secondary actions, is defined by its main function: the major modification(s) made to concrete, such as the fresh and/or hardened...
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General
Actions of concrete admixtures
Bibliography
Standards and norms
- Produits chimiques liquides à usage industriel. Détermination de la masse volumique à 20 °C - ISO 758:1976 - Novembre 1976
- Agents de surface. Détermination du pH des solutions aqueuses. Méthode potentiométrique - ISO 4316:1977 - Août 1977
- Plastics – Vinyl chloride homopolymers and copolymers – Chlorine dosing - NF EN ISO 1158 - Juillet 1998
- Utilisation du chlorure de calcium et des adjuvants contenant...
Directory
Organizations – Federations – Associations (non-exhaustive list)
SYNAD (Additives Producers' Association)
CERIB (Research center for the concrete industry)
CIMbéton (information...
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