Structural behavior of alkali activated fly ash concrete. Part .Mixture design, material properties and sample fabrication

Joseph Robert Yost, Aleksandra Radlińska, Stephen Ernst, Michael Salera

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


Alkali Activated Fly Ash Concrete (AAFAC) is an alternative form of concrete that uses fly ash as a 100 % replacement for ordinary portland cement. In producing AAFAC, fly ash is combined with alkali activators that chemically react to form a binder. When combined further with fine and coarse aggregates and often cured at elevated temperature, a concrete material is produced with strength and stiffness properties similar to ordinary portland cement concrete (OPCC). In this paper fabrication of full scale steel reinforced AAFAC beams is presented. The research scope include.development of an AAFAC mixture design, fabrication of nine AAFAC beam samples, development of an elevated temperature curing system, temperature measurement during curing, and investigation of hardened AAFAC material properties. Results show AAFAC can be manufactured in the same way as OPCC, and that it has a self consolidating consistency in the fresh state. Curing at 60 °C for 24 h produced very rapid strength gain. Compression strengths at 1 day ranged between 47 and 53 MPa, with 28 days compression strengths ranging from 48 to 55 MPa. Material test results show AAFAC is a brittle material with an approximately linear stress-strain response, and an elastic modulus slightly less than that predicted by ACI 318.

Original languageEnglish (US)
Pages (from-to)435-447
Number of pages13
JournalMaterials and Structures/Materiaux et Constructions
Issue number3
StatePublished - 2013

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • General Materials Science
  • Mechanics of Materials


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