Properties of Two- and Three-Component Blended Cements with Different Types of Fly Ashes

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Title: Properties of Two- and Three-Component Blended Cements with Different Types of Fly Ashes

Author(s): J. Matolepszy, M. Gawlicki, and R. Mroz

Publication: Special Publication

Volume: 242

Issue:

Appears on pages(s): 525-536

Keywords: blended cement; cement; fluidized bed-combustion; fly ash

Date: 4/1/2007

Abstract:
The changes in the procedures of solid fuel combustion and application of different methods of sulfur removal from combustion gas in electric and thermal-electric power stations have resulted in fly ashes from fluidised-bed combustion. There are available in the market for addition cement beside fly ashes. In Poland, there are frequent cases of combustion of hard coal in conventional and fluidised-bed combustion installations, which have been derived from the same mine. It allows comparing the properties of different types of ashes obtained from the same coal. This paper presents chemical composition (basic and traces components) and phase composition, and properties of both kinds of fly ashes from combustion of Silesian coals. Also presented are comparison between properties of hydration products of cements and mortars made from two and three-component blended cements with different type and quantity of ashes. Fly ash from fluidised-bed combustion installations was incorporated in blended cements as the pozzolana component and sulfate ions carrier (modulus of gypsum). Beside standard methods of testing of functional quality of ashes and cements, different types of analysis have been used.