admixture for concrete Topic

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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: Slump Requirements per ACI 301 and Roughening of Existing Concrete to 1/4 in. Amplitude per ACI 318

Publication: Concrete International
Date: 5/1/2019

Polymeric Microspheres Provide Resistance to Harsh Winter Conditions

Publication: Concrete International
Date: 1/1/2019

Testing Self-Sealing Properties of Concrete

Publication: Concrete International
Date: 1/1/2019

Novel Clay-Mitigating Polymers for Robust Water-Reducing Admixtures

Publication: Concrete International
Date: 1/1/2019

Novel Admixtures to Reduce the Stickiness of Low W/C Concretes

Publication: Special Publication
Date: 9/26/2018

A New Type of Superplasticizer Possessing Dendrimeric Structure

Publication: Special Publication
Date: 9/26/2018

Study on Properties and Mechanism of Liquid Alkali Free Set Accelerating Admixture for Sprayed Concrete

Publication: Special Publication
Date: 9/26/2018

Overview of Defoaming Technologies for Polycarboxylate-Based Superplasticizers

Publication: Special Publication
Date: 9/26/2018

Alternative Setting Retarders for Portland Cement Clinker

Publication: Special Publication
Date: 9/26/2018

Definition of a PCE Family that Increases Performances when a Workability Retention Agent (WRA) is Added

Publication: Special Publication
Date: 9/26/2018

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