Utilization of CFB Fly Ash in Eco-Cement: Mechanical Properties and Microstructural Analysis

Abstract:

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The disposal of circulating fluidized bed (CFB) fly ash has been a serious environmental problem in the development of our society. In this work, the feasibility of recycling CFB fly ash as a blended material incorporating blast furnace slag (BFS), clinker and gypsum for the preparation of Eco-cement has been investigated. The mechanical properties of CFB fly ash based Eco-cements, including CFB fly ash–clinker system, CFB fly ash–ground BFS system, and CFB fly ash–ground BFS–clinker system, were evaluated in this paper. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques were used to analyze the microstructural changes and the hydration products of the CFB fly ash based Eco-cement pastes. The results indicated that it is feasible to use CFB fly ash along with BFS and clinker to produce Eco-cement. The hydration products of CFB fly ash based Eco-cement are mostly ettringite and amorphous C-S-H gel, which are principally responsible for the strength and structure development of CFB fly ash based Eco-cement in the hydration process.

Info:

Periodical:

Advanced Materials Research (Volumes 150-151)

Edited by:

Jinglong Bu, Zhengyi Jiang and Sihai Jiao

Pages:

885-889

DOI:

10.4028/www.scientific.net/AMR.150-151.885

Citation:

X. M. Liu et al., "Utilization of CFB Fly Ash in Eco-Cement: Mechanical Properties and Microstructural Analysis", Advanced Materials Research, Vols. 150-151, pp. 885-889, 2011

Online since:

October 2010

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Price:

$35.00

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