Sep 30, 2025 · Fly ash is a by-product from the combustion of pulverized coal, and is widely used as an ingredient in hydraulic-cement concrete. Because it improves many desirable properties …

Fly ash is used in concrete and other portland cement-based systems primarily because of its pozzolanic and cementitious prop-erties. These properties contribute to strength gain and are …

Nov 1, 2004 · 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 …

Fly ash usually decreases water demand. Most of the other pozzolans increase the water demand. Pozzolans reduce bleeding because of fineness; reduce the maximum rise in …

What is fly ash? Q. What is fly ash? A. Fly ash is the finely divided residue that results from the combustion of ground or powdered coal and that is transported by flue gasses from the …

The use of fly ash typically results in more economical concrete construction. This report gives an overview of the origin and properties of fly ash, its effect on the properties of hydraulic cement …

Apr 1, 1993 · Some of the most promising substitutes or supplementary cementing materials are high- and low-calcium fly ashes, ferrous and nonferrous slags, condensed silica fume, and rice …

Jan 1, 2000 · Title: High-Volume Fly Ash System: Concrete Solution for Sustainable Development Author (s): Alain Bilodeau and V. Mohan Malhotra Publication: Materials Journal Volume: 97 …

May 1, 1999 · Title: Making Concrete "Greener" with Fly Ash Author (s): V. M. Malhotra Publication: Concrete International Volume: 21 Issue: 5 Appears on pages (s): 61-66 …

Date: 3/1/1980 Abstract: Fly ash used as a pozzolan to replace some of the portland cement in concrete often achieves energy and cost savings and imparts specific engineering properties …