Title: Recommended Practice for Consolidation of Concrete (ACI 309-72)

Author(s): ACI Committee 309

Publication: Journal Proceedings

Volume: 69

Issue: 10

Appears on pages(s): 613

Keywords: air; air entrainment; amplitude; centrifugal force; compacting; concrete blocks; concrete construction; concrete pavements; concrete pipes; concrete products; concrete slabs; concretes; consistency; consolidation; floors; formwork (construction)

DOI: 10.14359/15230

Date: 10/1/1972

Abstract:

Note: This is a one page synopsis only. The full paper was published in the December 1971 Journal, pg. 893-932 (JL68-76).

Consolidation is the process of removing entrapped air from fresh concrete in the form. Several methods and techniques are available - the choice depending mainly on the workability of the mix, placing conditions, and degree of deaeration desired. Some form of vibration is usually employed. This recommended practice includes up-to-date information on the mechanism of consolidation, and gives recommendations on equipment characteristics and procedures for various classes of construction.