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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/57782
Title: Effect of ternary cements containing thermally activated paper sludge and fly ash on the texture of C–S–H gel
Authors: Goñi Elizalde, Sara; Frías, M.; Vegas, Iñigo; García, R.; Vigil de la Villa, R.
Keywords: Blended cement
Calcium–silicate–hydrate (C–S–H)
Surface area
Compressive strength
Issue Date: 2012
Publisher: Elsevier
Citation: Construction and Building Materials; 30 : 381-388 (2012)
Abstract: The texture of the C–S–H gels formed in ternary cement blends containing thermally activated paper sludge (APS), fly ash (FA) from coal combustion and Ordinary Portland Cement (OPC) was studied by means of the specific surface area (SSA) and pore-size distribution (PSD), which were measured by the sorption isotherms of nitrogen gas and the BET method. Two differentiated zones in the PSD of the C–S–H gel at ∼10–20 nm and ∼5 nm were observed. The proportion of such zones depends on the age of hydration and amount of OPC replacement. The incorporation of the additions (APS and FA) clearly revealed an increase in both porosity and SSA. This effect decreased with the progress of hydration together with a refinement of the nano-porous structure of C–S–H. High correlations were found among these nanostructure characteristics of the C–S–H gel and mechanical strengths.
Publisher version (URL): http://dx.doi.org/10.1016/j.conbuildmat.2011.12.002
URI: http://hdl.handle.net/10261/57782
DOI: 10.1016/j.conbuildmat.2011.12.002
ISSN: 0950-0618
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