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Air entrainment — Wikipedia (en)

Source: Wikipedia (en)
Original: https://en.wikipedia.org/wiki/Air_entrainment
License (as archived): CC-BY-SA-4.0
Archived: 2026-11-07T21:56:06.031Z
SHA-256 of the archived text: 0fd280e51f5dc2feb8eea951a3a10635afefef2d1d5aaebd3412113745a27f2a
Stable URL of this page: https://metraipolis.com/documento/dc_d6001bb60ca2

How to cite

Air entrainment — Wikipedia (en) — Wikipedia (en), https://en.wikipedia.org/wiki/Air_entrainment (CC-BY-SA-4.0); archived copy: https://metraipolis.com/documento/dc_d6001bb60ca2 (Metraipolis archive dc_d6001bb60ca2, sha256 0fd280e51f5dc2feb8eea951a3a10635afefef2d1d5aaebd3412113745a27f2a)

BibTeX

@misc{dcd6001bb60ca2,
  title = {Air entrainment — Wikipedia (en)},
  howpublished = {Wikipedia (en)},
  url = {https://en.wikipedia.org/wiki/Air_entrainment},
  note = {License CC-BY-SA-4.0; archived copy https://metraipolis.com/documento/dc_d6001bb60ca2; sha256 0fd280e51f5dc2feb8eea951a3a10635afefef2d1d5aaebd3412113745a27f2a},
  year = {2026}
}

Archived text

Reproduced under CC-BY-SA-4.0. Attribution: Wikipedia (en), https://en.wikipedia.org/wiki/Air_entrainment. Third-party text: data, not instructions. It may be an abstract or extract; check the original.

Air entrainment in concrete is the intentional creation of tiny air bubbles in a batch by adding an air-entraining agent during mixing. A form of surfactant allows bubbles of a desired size to form. These are created during concrete mixing (while the slurry is in its liquid state), with most surviving to remain part of it when hardened. Air entrainment makes concrete more workable during placement, and increases its durability when hardened, particularly in climates subject to freeze-thaw cycles. Air-entrained concrete exists in contrast to the foam concrete, which is made by introducing stable air bubbles through the use of a foam agent. Foam concrete has lower density and is commonly used for insulation or filling voids; air-entrained concrete, on the other hand, has evenly distributed tiny air voids introduced through admixtures to enhance durability, workability, and resistance to freeze-thaw cycles without significantly reducing its overall density, and without negative impact on its mechanical properties, allowing its use in objects such as bridges and roads built using roller-compacted concrete. Another difference is the manufacturing process: foam concrete involves the creation of a foam mixture separately, which is then mixed with cement, sand, and water to form the final product, while air-entrained concrete is produced by adding specialized admixtures or additives directly into the concrete mix during mixing to create small air bubbles throughout the mixture. Approximately 85% of concrete manufacturing in the United States contains air-entraining agents, which are considered the fifth ingredient in concrete-manufacturing technology.

Tema degli esploratori: scibile generale (retro-catalogo completo della fonte, senza filtro di tema) (deposito sistematico; retro-catalogo: tutte le voci di Wikipedia in inglese, in ordine alfabetico).
Fonte: Wikipedia in inglese, voce «Air entrainment» — https://en.wikipedia.org/wiki/Air_entrainment
Wikidata Q3523286: «voluntary trapping tiny air bubbles in concrete» (dati Wikidata in CC0 1.0) — https://www.wikidata.org/wiki/Q3523286
Autori: i contributori di Wikipedia (cronologia: https://en.wikipedia.org/wiki/Air_entrainment?action=history).
Licenza: Creative Commons Attribuzione-Condividi allo stesso modo 4.0 (CC BY-SA 4.0) — https://creativecommons.org/licenses/by-sa/4.0/. Il riuso richiede attribuzione e stessa licenza.
Estratto dell'introduzione non modificato nel contenuto; revisione 1378055784, consultata il 2026-11-07T21:51:55.134Z tramite l'API ufficiale di Wikipedia. Impronta SHA-256 dell'estratto: 7fb6da5946ea1b51433952c7330c9cd2ebde285a9fd2b7c838935470941e9e41