air-entrained concrete: meaning, definition, pronunciation and examples
C2 (Specialized)Formal, Technical
Quick answer
What does “air-entrained concrete” mean?
Concrete with microscopic, intentionally created air bubbles throughout its mixture, primarily to resist damage from freeze-thaw cycles.
Audio
Pronunciation
Definition
Meaning and Definition
Concrete with microscopic, intentionally created air bubbles throughout its mixture, primarily to resist damage from freeze-thaw cycles.
A specialized construction material where billions of tiny, stable, disconnected air bubbles are incorporated into the cement paste. These bubbles act as internal pressure relief valves that protect the concrete from cracking during freezing (as expanding ice has a place to expand into). It is also used to improve workability and reduce bleeding and segregation of the fresh concrete mix.
Dialectal Variation
British vs American Usage
Differences
No major lexical differences. Spelling of related terms follows regional conventions (e.g., 'behaviour' vs. 'behavior'). Technical specifications (e.g., ACI vs. European standards) differ in required air content percentages.
Connotations
Purely technical term in both varieties. Connotes durability, specification compliance, and resistance to harsh weather.
Frequency
Equally frequent and essential in construction terminology in both the US and UK/Commonwealth, wherever freeze-thaw conditions exist.
Grammar
How to Use “air-entrained concrete” in a Sentence
The [contractor/specification] requires [air-entrained concrete] for the [foundation/pavement].To achieve [durability/freeze-thaw resistance], one must use [air-entrained concrete].[Air-entrained concrete] contains [X%] of entrained air.Vocabulary
Collocations
Examples
Examples of “air-entrained concrete” in a Sentence
verb
British English
- The mix design was altered to air-entrain the concrete for the coastal project.
- It is standard practice to air-entrain concrete in this climate.
American English
- The contractor failed to properly air-entrain the concrete, leading to premature scaling.
- This admixture will air-entrain the mix to the specified level.
adverb
British English
- [Not a standard adverbial form for this compound.]
American English
- [Not a standard adverbial form for this compound.]
adjective
British English
- The air-entrained mix was delivered at 14:00.
- We require an air-entraining admixture.
American English
- Check the air-entrained status on the batch ticket.
- The spec calls for an air-entrained mix design.
Usage
Meaning in Context
Business
A project manager might say, 'The budget accounts for the premium of air-entrained concrete for all exterior slabs.'
Academic
In a materials science paper: 'The spacing factor of the entrained air void system is critical to the performance of air-entrained concrete.'
Everyday
Rarely used. A homeowner might hear: 'We used a special mix in your driveway so it won't crack as easily in winter.'
Technical
A site engineer's note: 'Verify air content of the delivered air-entrained concrete meets the specification of 6% ±1.5 before placement.'
Vocabulary
Synonyms of “air-entrained concrete”
Strong
Neutral
Weak
Vocabulary
Antonyms of “air-entrained concrete”
Watch out
Common Mistakes When Using “air-entrained concrete”
- Pronouncing it as 'air-entertained concrete'.
- Using it interchangeably with 'porous concrete' or 'pervious concrete' (which are for drainage).
- Assuming it is weaker; while it has slightly lower compressive strength, its durability benefit is paramount.
FAQ
Frequently Asked Questions
Yes, typically. The entrained air voids slightly reduce the compressive strength of the concrete. However, this is an acceptable trade-off because the air drastically increases durability against freeze-thaw damage, which is more critical for longevity in many applications.
It is achieved by adding specific chemical admixtures, called air-entraining agents (AEAs), during the mixing process. These agents, often based on natural wood resins or synthetic detergents, create stable, microscopic bubbles that survive the mixing, placing, and hardening stages.
No, not with the naked eye. The bubbles are microscopic, typically between 10 and 1000 micrometres in diameter, and are uniformly distributed throughout the cement paste. You need a microscope to view them properly.
No. Its use is dictated by climate and exposure conditions. It is crucial in regions subject to repeated freezing and thawing while the concrete is wet (e.g., pavements, bridge decks, kerbs). In warm, dry climates, or for interior structural elements, non-air-entrained concrete is standard.
Concrete with microscopic, intentionally created air bubbles throughout its mixture, primarily to resist damage from freeze-thaw cycles.
Air-entrained concrete is usually formal, technical in register.
Air-entrained concrete: in British English it is pronounced /ˈeə(r) ɪnˌtreɪnd ˈkɒŋkriːt/, and in American English it is pronounced /ˈɛr ɛnˌtreɪnd ˈkɑːnkriːt/. Tap the audio buttons above to hear it.
Phrases
Idioms & Phrases
- “[No common idioms for this specific technical term]”
Learning
Memory Aids
Mnemonic
Think of it as concrete wearing a 'bubble wrap' jacket on a microscopic level. These tiny air pockets provide cushioning against the 'push' of freezing water.
Conceptual Metaphor
CONCRETE IS A LIVING SYSTEM that needs to 'breathe' or have 'shock absorbers' (air bubbles) to survive harsh winters.
Practice
Quiz
What is the primary purpose of air-entrained concrete?