The binder-aggregate interface in NHL mortar with non-calcitic aggregate: Physical properties

•Mortars made with a siliceous and a felsic (granitic) aggregate from Scotland.•A wide range of aggregate content by volume with NHL5.•Parallel trends in strength, sorptivity, porosity and carbonation resistance observed.•The results confirm the importance of the binder-aggregate interface. In the a...

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Bibliographic Details
Published in:Construction & building materials 2023-09, Vol.398, p.132349, Article 132349
Main Authors: Forster, Alan M., Masson, Lee P., Suryanto, Benny, Banfill, Phil F.G., Torney, Clare, Valek, Jan
Format: Article
Language:English
Subjects:
Binder-aggregate interface
Felsic aggregate
Mortar
Natural hydraulic lime
Siliceous aggregate
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Summary:•Mortars made with a siliceous and a felsic (granitic) aggregate from Scotland.•A wide range of aggregate content by volume with NHL5.•Parallel trends in strength, sorptivity, porosity and carbonation resistance observed.•The results confirm the importance of the binder-aggregate interface. In the absence of resources of calcitic aggregates this work aimed to confirm the suitability of Scottish aggregates in NHL mortar. Strength, sorptivity, porosity and carbonation of mortars made with one siliceous and one felsic (granitic) aggregate have been studied. The results suggest that there are no technical barriers to their use and that environmental and philosophical considerations reveal positive benefits. The measured properties all depend on the relative volume proportions of binder and aggregate, even at constant water/binder ratio and the trends can be explained by considering the behaviour at the binder-aggregate interface.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2023.132349