Research

Environmental (wet and dry) cycling of hydraulic lime mortars


Reference:

Morgan, R. C. and Ball, R. J., 2013. Environmental (wet and dry) cycling of hydraulic lime mortars. Journal of the Building Limes Forum, 20, pp. 21-31.

Related documents:

[img]
Preview
PDF (2013 Morgan JBLF - black&white) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (3140kB) | Preview
    [img]
    Preview
    PDF (2013 Morgan JBLF - colour) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
    Download (14MB) | Preview

      Official URL:

      http://www.buildinglimesforum.org.uk/blf-publications

      Abstract

      This study investigates the impact moisture control has on the aftercare of freshly manufactured hydraulic lime mortars by wet and dry cycling. Mechanical properties were monitored by periodic compressive testing and the extent of carbonation by phenolphthalein staining of cross sections. Hydration products after 28 days of cycling were identified by microstructural analysis using scanning electron microscopy. The cycling procedure caused a dramatic increase in compressive strength development. This was attributed to an increased rate of carbonation and hydration in three different mix designs containing aggregates with different particle size distributions. The cycling process also increased the depth of carbonation significantly. It was found that finer aggregates had greater depths of carbonation, in all exposure conditions. The strength development, as a result of 28 days of cycling, was similar in the fine and mixed-particle aggregate mix designs since they were both fully carbonated, whereas the equivalent strength increase was lower for the coarse aggregate mix as the specimens weren't fully carbonated. This illustrates the importance of carbonation on strength development within hydraulic lime mortars, with a finer aggregate causing a faster strength increase.

      Details

      Item Type Articles
      CreatorsMorgan, R. C.and Ball, R. J.
      DepartmentsFaculty of Engineering & Design > Architecture & Civil Engineering
      Research Centres & Institutes > BRE Centre in Innovative Construction Materials
      Research CentresMaterials Research Centre
      RefereedYes
      StatusPublished
      ID Code37236

      Export

      Actions (login required)

      View Item

      Document Downloads

      More statistics for this item...