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Simulation of self-healing of dolomitic lime mortar

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Author: Lubelli, B.A. · Nijland, T.G. · Hees, R.P.J. van
Type:article
Date:2011
Source:13th Euroseminar on Microscopy Applied to Building Materials, 14-18 June 2011, Ljubljana, Slovenia, 1-6
Identifier: 430048
Keywords: Materials · Building Engineering & Civil Engineering · BM - Building Materials · TS - Technical Sciences

Abstract

In the present research a test procedure was set up to reproduce self-healing on lime-based (both pure calcium and magnesium-calcium) mortar specimens in laboratory. After few months testing, during which the specimens were subjected to wet-dry cycles, thin sections of the specimens were prepared and observed by Polarization and Fluorescence Microscopy (PFM) and by Scanning Electron Microscope (SEM) equipped with Energy-dispersive X-ray spectroscopy (EDX). The specimens prepared with dolomitic lime showed the occurrence of self-healing: a magnesium compound is observed filling cracks and voids. These results suggest new possibilities for the development of dolomitic lime mortars with an increased self-healing capacity.