Title: Structural Concrete Incorporating High Volumes of ASTM Class Fly Ash

Author(s): W. S. Langley, G. G. Carette, and V. M. Malhotra

Publication: Materials Journal

Volume: 86

Issue: 5

Appears on pages(s): 507-514

Keywords: cement content; concrete durability; concretes; creep properties; drying shrinkage; elastic properties; fly ash; freeze-thaw durability; mechanical properties; permeability; plasticizers; strength; temperature rise (in concrete); Materials Research

DOI: 10.14359/2130

Date: 9/1/1989

Abstract:
Gives results of investigations dealing with concrete incorporating high volumes of ASTM Class F fly ash. Concrete mixtures containing 56 percent of fly ash by weight of total cementitious materials have been evaluated in the laboratory at several water-to-cementitious materials ratios. The concretes investigated were air entrained, had cement contents of 100, 150, and 180 kg/m3 of concrete, and water contents ranging from 100 to 120 kg/m3. Because of the very low water contents used, high-range water-reducing admixtures were employed to achieve high slumps. In spite of the relatively low cement factors used, the concretes investigated had excellent mechanical and elastic properties and performed satisfactorily in freezing and thawing tests done in accordance with ASTM C 666, Procedure A. Two projects in the Halifax area are described where this type of concrete has been used successfully in structural applications.