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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

Concrete Q&A: Mitigating Concrete Shrinkage

Publication: Concrete International
Date: 5/1/2023

Concrete Q&A: Vapor Is the Trojan Horse of Moisture in Concrete Slabs

Publication: Concrete International
Date: 7/1/2022

Low-Carbon Durable Concrete for the New Genoa’s San Giorgio Bridge

Publication: Special Publication
Date: 7/1/2022

A Review of Current Superplasticizers Highlighting their Specific Properties and Advantages

Publication: Special Publication
Date: 7/1/2022

Nonionic Surfactants as Bubble Stabilizer in Concrete

Publication: Special Publication
Date: 7/1/2022

Innovative Admixtures to Address Operational and Sustainability Issues with Returned Concrete

Publication: Special Publication
Date: 7/1/2022

Novel Perspective to Explain the Retarding Effect of Organic Admixtures in Silicate-Activated Slag

Publication: Special Publication
Date: 7/1/2022

Effect of Calcium Ions on Bio-Based Polymers for Rheology Control

Publication: Special Publication
Date: 7/1/2022

Effect of Different Retarders and their Combination with Superplasticizer on the Properties of CSA

Publication: Special Publication
Date: 7/1/2022

Impact of a Novel Slow Absorption Superabsorbent Polymer on Compressive Strength and Autogenous Shrinkage of Concrete

Publication: Special Publication
Date: 7/1/2022

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