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Infrastructures 2018, 3(3), 34; https://doi.org/10.3390/infrastructures3030034

Durability and Compatibility of Lime-Based Mortars: The Effect of Aggregates

1
Buildings Department, National Laboratory for Civil Engineering, 1700-066 Lisbon, Portugal
2
Materials Department, National Laboratory for Civil Engineering, 1700-066 Lisbon, Portugal
3
Department of Civil Engineering, Architecture and Georresources, Instituto Superior Técnico, Universidade de Lisboa, 1049-001 Lisbon, Portugal
*
Author to whom correspondence should be addressed.
Received: 31 July 2018 / Revised: 21 August 2018 / Accepted: 28 August 2018 / Published: 31 August 2018
(This article belongs to the Special Issue Selected Papers from the REHABEND 2018 Congress)
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Abstract

In order to fully perform their functions and be durable, mortars for renders and plasters are requested to have a set of characteristics that can vary with the type of exposure to external environmental actions and the type of substrate. Generally, they need moderate strength, high deformability, some water protection capability, good adhesion to the substrate and compatibility with the pre-existent materials. The presence of water and its movement inside the pore structure of the mortars are among the most significant causes of degradation. Moreover, several authors consider that the main factors for durability and good performance of lime-based mortars are mostly related with the good quality of the binder and the use of adequate aggregates. This paper intends to study the effect of ageing on the properties and durability of air lime mortars, using aggregates of different mineralogy. For this purpose, different mortars compositions are exposed to an accelerated weathering test under defined conditions. The obtained characteristics are discussed and compared with the results obtained with the same mortars tested in laboratory conditions. The effects of the aggregate type on the durability of mortars seem to be linked to their effects on the mortars porous structure. View Full-Text
Keywords: mortar; aerial lime; aggregates; experimental testing; performance mortar; aerial lime; aggregates; experimental testing; performance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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MDPI and ACS Style

Santos, A.R.; Veiga, M.R.; Matias, L.; Santos Silva, A.; de Brito, J. Durability and Compatibility of Lime-Based Mortars: The Effect of Aggregates. Infrastructures 2018, 3, 34.

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