Title:
Air-Entrained Roller Compacted Concrete
Author(s):
Robert W. Cannon
Publication:
Concrete International
Volume:
15
Issue:
5
Appears on pages(s):
49-54
Keywords:
air-entraining agents; air entrainment; bond; workability; compressive strength; consistency tests; roller compacted concrete; water-reducing agents; fly ash; splitting tensile strength; tension tests; Construction
DOI:
Date:
5/1/1993
Abstract:
Describes the Tennessee Valley Authority's involvement in the development of Roller Compacted Concrete (RCC) and the utilization of air-entrained RCC in the construction of a RCC safety dam at their Nickajack Hydroelectric Project. 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 and its construction, the forming of upstream and downstream faces, the utilization of face concrete, control of air contents during construction, the extraction and evaluation of cores drilled from the structure, the loss of air in placement, and the limited thermal cracking of the structure.