On the Development of Fly Ash-Based Geopolymer Concrete

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Title: On the Development of Fly Ash-Based Geopolymer Concrete

Author(s): Djwantoro Hardjito, Steenie E. Wallah, Dody M. J. Sumajouw, and B.Vijaya Rangan

Publication: Materials Journal

Volume: 101

Issue: 6

Appears on pages(s): 467-472

Keywords: compressive strength; creep; fly ash; shrinkage; sulfate resistance

Date: 11/1/2004

Abstract:
To reduce greenhouse gas emissions, efforts are needed to develop environmentally friendly construction materials. This paper presents the development of fly ash-based geopolymer concrete. In geopolymer concrete, a by-product material rich in silicon and aluminum, such as low-calcium (ASTM C 618 Class F) fly ash, is chemically activated by a high-alkaline solution to form a paste that binds the loose coarse and fine aggregates, and other unreacted materials in the mixture. The test results presented in this paper show the effects of various parameters on the properties of geopolymer concrete. The application of geopolymer concrete and future research needs are also identified.