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Assessment of phase formation in lime-based mortars with added metakaolin, Portland cement and sepiolite, for grouting of historic masonry
Sepulcre Aguilar, Alberto y Hernández Olivares, Francisco
Assessment of phase formation in lime-based mortars with added metakaolin, Portland cement and sepiolite, for grouting of historic masonry.
"Cement and Concrete Research", v. 40
Lime-based mortars containing pozzolanic additions of metakaolin, sepiolite and white Portland cement are
studied in order to determine their performance as historic masonry conservation mortars. Hydration
products on metakaolin
lime blended mortars include stable and metastable phases. The presence of such
products has been studied by means of DTA and XRD analysis, concluding that the selection between them is
mainly related with the water
lime ratio. Sepiolite addition to metakaolin
lime mortars has shown to inhibit
13 formation. Therefore, the in
fluence of phase distribution on the mechanical resistance is considered.
Finally, compounds production on blended lime–white Portland cement was compared to natural hydraulic
lime ones, and as a result, no remarkable differences appeared, apart from traces of possible cement Portland
addition to the latter, usually not mentioned in the nominal composition supplied by the manufacturers of
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