Abstract

ESPITIA-MORALES, Andrés F.  and  TORRES-CASTELLANOS, Nancy. Assessment of the Compressive Strength of Lime Mortars with Admixtures Subjected to Two Curing Environments. Ing. Investig. [online]. 2022, vol.42, n.2, e208.  Epub June 13, 2022. ISSN 0120-5609.  https://doi.org/10.15446/ing.investig.91364.

This article presents the assessment of the compressive strength of three types of lime mortar, one without admixtures and the remaining two added with metakaolin and brick dust. The chemical composition of the lime and the pozzolans was evaluated using the X-ray fluorescence technique. The mortars were subjected to two curing conditions: a humidity and temperature-controlled chamber and an accelerated carbonation chamber. Then, they were tested at the ages of 7, 28, 60, and 90 days. The results showed that the samples cured in the carbonation chamber had higher compressive strength values than the ones cured in the humidity and temperature-controlled chamber because lime mortars increase their strength with the carbonation of the calcium hydroxide present in the lime. Likewise, when adding metakaolin to the lime mortars cured in the humidity and temperature-controlled chamber, the compressive strength values were close to those of the mortars with lime only, which were cured in the carbonation chamber. From the results of this research, it is worth noting that the use of pozzolans in lime mortars improves the short-term compressive strength, which is attractive for the rehabilitation of heritage buildings, given that, in short periods of time, it manages to match the strengths that lime mortars acquire over time.

Keywords : mortar; lime; metakaolin; brick dust; carbonation; compressive strength.

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