Home > Topics in Concrete > topicdetail

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.

ACI Web Pages


Advanced Tips
Type Example Notes
Fuzzy kettle~ Contain terms that are close to the word kettle, such as cattle
Wild cat* Contain terms that begin with cat, such as category and the extact term cat itself
Exact-Single orange Contain the term orange
Exact-Phrase "dnn is awesome" Contain the exact phase dnn is awesome
OR orange bike Contain the term orange or bike, or both. OR, if used, must be in uppercase
orange OR bike
AND orange AND bike Contain both orange and bike. AND must be in uppercase
Combo (agile OR extreme) AND methodology Contain methodology and must also contain agile and/or extreme
Results Per Page:
select
Limit the search results with the specified tags
Limit the search results modified within the specified time
select
Limit the search results from the specified source
select
Search results must exactly contain the keywords

Please enter this 5 digit unlock code on the web page.