Microstructure and mechanical performance of belite cements from high calcium coal fly ash

Journal Article · Fri Jul 01 04:00:00 EDT 2005 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1551-2916.2005.00344.x· OSTI ID:20638592

Guerrero, A; Goni, S; Moragues, A; Dolado, J S ^[1]

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1. Instituto de Ciencias de la Construccion 'Eduardo Torroja' (CSIC), Madrid (Spain)

The microstructure and mechanical performance of two low energy fly ash belite cements (FABC-1-W and FABC-1-N) obtained from high calcium-coal fly ash as raw material is studied in this work. The FABC were obtained after a previous hydrothermal treatment of the fly ash in demineralized water and NaOH 1M solution. The hydration of both FABC-1-W and FABC-1-N during 180 days was followed by thermal analysis, X-ray diffraction, FT infrared spectroscopy, scanning electron microscopy and Brunauer-Emmett and Teller-N2 surface area measurements. The mechanical properties were studied under different curing conditions: normal (21 degrees C and {lt} 95% RH) and accelerated (40{sup o}C and {lt} 95% RH). Porosity and pore-size distribution were also studied. The results showed a better mechanical performance for FABC-1-N when the curing was normal and a better mechanical performance for FABC-1-W when the curing was accelerated.

• OSTI ID: 20638592
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 7 Vol. 88; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
CEMENTS
COAL
CURING
FLY ASH
HYDRATION
HYDROTHERMAL SYNTHESIS
MECHANICAL PROPERTIES
MICROSTRUCTURE
WASTE PRODUCT UTILIZATION