Title:
Durability of Concrete Incorporating High Volumes of Fly Ash From Sources in the U.S.A.
Author(s):
A. Bilodeau, V. Sivasundaram, K. E. Painter, and V. M. Malhotra
Publication:
Materials Journal
Volume:
91
Issue:
1
Appears on pages(s):
3-12
Keywords:
air entrainment; chlorides; compressive strength; concretes; deicing; durability; flexural strength; fly ash; freeze-thaw durability; permeability; slump tests; Materials Research
DOI:
10.14359/4411
Date:
1/1/1994
Abstract:
Presents the results of investigations to determine the various durability aspects of high-volume fly ash concrete using eight fly ashes and two portland cements from U.S. sources. Briefly, in high-volume fly ash concrete, the water and cement content are kept low, at about 115 and 115 kg/m 3 of concrete, respectively, and the proportion of fly ash in the total cementitious materials content ranges from 55 to 60 percent. The durability aspects investigated included resistance to repeated cycles of freezing and thawing (ASTM C 666 Procedure A), deicing salt scaling resistance (ASTM C 672), resistance to chloride-ion penetration (AASHTO T 277-83), determination of water permeability coefficient, and resistance to sulfate attack. Based upon the test results, it is concluded that regardless of the type of fly ash and the cements used, air-entrained high-volume fly ash concrete exhibited excellent durability characteristics in the test investigated. The only exception was the deicing salt scaling test, in which the performance of the concretes investigated was less than satisfactory.