In most air-entrained concrete, values between these limits (based on total concrete volume) have been the aim. (ACI 211.1 considers different exposure conditions and makes some allowance …

Chapter 3—Air-entraining admixtures 3.1—History 3.2—Mechanism 3.3—Use of air-entraining admixtures 3.4—Properties of entrained air 3.5—Handling and testing of air-entrained …

Air voids, however, also improve the workability of concrete. Therefore, air-entrained concrete at a lower w/cm can be prepared to provide similar workability to non-airentrained concrete, thus …

Mar 24, 2025 · The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical …

typical to get between 1.8 and 2.2% entrapped air in non-air-entrained concrete, but 3% is the industry standard maximum “total air” recommended to be troweled. While 3% is not a magical …

Therefore, it could be concluded that unless otherwise required by the construction documents, non-air-entrained concrete not exposed to freezing and thawing does not have to be tested for …

May 1, 1993 · Discusses the entrainment of air in RCC, the effective use of admixtures, the initial laboratory investigations of entraining air, the trial mixes for Nickajack, the Nickajack Project …

ACI 301-10 continues to require that the concrete be air-entrained as the default requirement. Using air- entrained concrete for hard-troweled concrete floors increases the chances of …

What is an air-entraining admixture? Q. What is an air-entraining admixture? A. It is an admixture that causes the development of a system of microscopic air bubbles in cement paste during …

Jul 1, 2023 · Title: Concrete Q&A: A Hard Look at “Hard Troweling” of Air-Entrained Concrete. Author(s): Publication: Concrete International. Volume: 45. Issue: 7. Appears on pages(s): 71 …