Title :
Utilization of High Carbon Fly Ash and Coal Gangue in Blended Cement: A Case Study
Author :
Zhao Feng-qing ; Guo Bin ; Liu Hong-jie ; Liu Jun-qin
Author_Institution :
Chem. Technol. Dept., Hebei Univ. of Sci. & Technol., Shijiazhuang, China
Abstract :
The purpose of this work is to present an effective alternative to combined use of high carbon fly ash (HCFA) and coal gangue. HCFA, coal gangue, together with some additives and water, were mixed, dried, and clacinated at 700degC~900degC to produce a cement admixture (FGA),which is used to produce environment friendly cementing material by mixing and co- grinding with granulated blast-furnace slag (GBFS) and alkali activator. The optimized formulation of the cementing material for Strength Grade 42.5 (GB12958-1999) was obtained with the aid of orthogonal array technique: FGA-47%, GBFS-47%, activator-6%. The hydration products, studied by SEM and XRD, are mainly ettringite and C-S-H (I).
Keywords :
X-ray diffraction; calcination; cement industry; cements (building materials); coal; fly ash; grinding; industrial waste; mixing; scanning electron microscopy; slag; waste handling; SEM; XRD; alkali activator; blended cement; calcination; cement admixture; coal gangue; cogrinding; environment friendly cementing material; granulated blast-furnace slag; high carbon fly ash; hydration products; mixing; orthogonal array technique; temperature 700 degC to 900 degC; Additives; Building materials; Chemical technology; Fly ash; Helium; Partial response channels; Scanning electron microscopy; Slag; Testing; X-ray scattering;
Conference_Titel :
Bioinformatics and Biomedical Engineering , 2009. ICBBE 2009. 3rd International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-2901-1
Electronic_ISBN :
978-1-4244-2902-8
DOI :
10.1109/ICBBE.2009.5163741
