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Admixture for Concrete

Definition: a material other than water, aggregates, cementitious materials, and fiber reinforcement, used as an ingredient of a cementitious mixture to modify its freshly mixed, setting, or hardened properties and that is added to the batch before or during its mixing.- ACI Concrete Terminology


Admixtures are materials added to concrete before or during mixing. Most admixtures are chemicals that change some property of the fresh or hardened concrete. Water, aggregates, cementitious materials (pozzolans and hydraulic cements [fly ash, silica fume, slag cement]), and fiber reinforcement are not considered admixtures.

Types of chemical admixtures include: air-entraining admixtures; accelerating admixtures; retarding admixtures; water-reducing admixtures (normal and mid-range); high-range water-reducing admixtures; and special-purpose admixtures such as pigments, corrosion inhibitors, shrinkage reducers, admixtures for producing flowing concrete, cold-weather admixtures, and pumping aids.

Practice oriented papers and articles ON ADMIXTURE FOR CONCRETE

Modeling the Service Life Performance of Bridge Deck Overlays

Publication: Special Publication
Date: 4/1/2022

Concrete Q&A: Synthetic Air-Entraining Admixtures and Air Content Requirements/Recommendations

Publication: Concrete International
Date: 12/1/2021

ACI Officers and Board Nominations for 2022-2023

Publication: Concrete International
Date: 11/1/2021

State of the Art on Self-Healing Capacity of Cementitious Materials Based on Data Mining Strategies

Publication: Special Publication
Date: 11/1/2021

Products & Practice Spotlight: Concrete Team Forges Ahead Amid Phoenix Heat

Publication: Concrete International
Date: 5/1/2021

Carbonation of 100-Year Bridges as a Guide to Preventing Modern Concrete from Degrading

Publication: Special Publication
Date: 4/22/2021

Preliminary Studies on the Influence of Nano-cellulose and Nano-alumina Fibers on UHPFRC

Publication: Special Publication
Date: 4/22/2021

Effect of Morphological Characteristics on the Viscosity of Cementitious Materials: Optimization of the Rheological Behavior of Ternary Cements

Publication: Special Publication
Date: 4/22/2021

Improving Performance and Reducing The CO2 Footprint of Concrete using Multiple Approaches

Publication: Special Publication
Date: 4/22/2021

Performance of NO2 Sequestered Recycled Concrete Aggregates (NRCA) Incorporated Concrete: Influence of Parent Concrete Properties

Publication: Special Publication
Date: 4/22/2021

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