Effect of steam curing on class C high-volume fly ash concrete mixtures

YAZICI H., Aydin S., YİĞİTER H., Baradan B.

CEMENT AND CONCRETE RESEARCH, vol.35, no.6, pp.1122-1127, 2005 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 6
  • Publication Date: 2005
  • Doi Number: 10.1016/j.cemconres.2004.08.011
  • Journal Name: CEMENT AND CONCRETE RESEARCH
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1122-1127
  • Keywords: compressive strength, thermal treatment, fly ash, volume stability, CHLORIDE-ION PENETRATION, COMPRESSIVE STRENGTH, BLENDED CEMENTS, DURABILITY, RESISTANCE
  • Dokuz Eylül University Affiliated: Yes

Abstract

The effect of steam curing on concrete incorporating ASTM Class C fly ash (FA), which is widely available in Turkey, was investigated. Cement was replaced with up to 70% fly ash, and concrete mixtures with 360 kg/m(3) cementitious content and a constant water/binder ratio of 0.4 were made. Compressive strength of concrete, volume stability of mortar bar specimens, and setting times of pastes were investigated. Test results indicate that, under standard curing conditions, only 1-day strength of fly ash concrete was low. At later ages, the strength values of even 50% and 60% fly ash concretes were satisfactory. Steam curing accelerated the 1-day strength but the long-term strength was greatly reduced. Setting time of fly ash-cement pastes and volume stability of mortars with 50% or less fly ash content were found to be satisfactory for standard specimens. In addition, for steam curing, this properties were acceptable for all replacement ratios. (c) 2004 Elsevier Ltd. All rights reserved.