Materiales de Construcción, Vol 56, No 283 (2006)

Hydraulic activity of belite cement from class C coal fly ash. Effect of curing and admixtures

S. Goñi
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain

A. Guerrero
Instituto de Ciencias de la Construcción Eduardo Torroja (CSIC), Spain


The effect of curing method and a water-reducing additive on the hydraulic activity of high lime content (ASTM type C) fly ash belite cement (FABC-2-W) is reported. A class C fly ash was subjected to hydrothermal treatment and subsequent calcination to synthesize FABC. Hydraulic activity was evaluated in the cement paste over 180 days from the physically bound water content as determined by thermogravimetric analysis and the degree of hydration, in turn found with X-ray diffraction (XRD) analysis. Mechanical strength, porosity and pore size distribution were also studied in equivalent mortar samples.


belite cement; fly ash; hydrothermal calcination treatment; hydraulic activity; admixture

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