Nanolime for the consolidation of lime mortars: A comparison of three available products

•The consolidation effectiveness of Calosil® and Nanorestore Plus® is reduced with time.•L’Aquila nanoparticles are more reactive which tend to grow better developed calcites.•L’Aquila nanolime provides higher durability to dissolution.•All treatments reduce the porosity in the surface that reduces...

Full description

Saved in:
Bibliographic Details
Published in:Construction & building materials 2018-08, Vol.181, p.394-407
Main Authors: Otero, J., Starinieri, V., Charola, A.E.
Format: Article
Language:English
Subjects:
Analysis
Calcium hydroxide
Calosil
Consolidation
Lime mortar
Limestone
Mechanical properties
Mortar
Nanolime
Nanoparticles
Nanorestore
Porosity
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:•The consolidation effectiveness of Calosil® and Nanorestore Plus® is reduced with time.•L’Aquila nanoparticles are more reactive which tend to grow better developed calcites.•L’Aquila nanolime provides higher durability to dissolution.•All treatments reduce the porosity in the surface that reduces evaporation rate.•The whitening effect caused by nanolime treatment is reduced after accelerated weathering. Nanolime products are one of the most promising consolidation methods for historic calcareous substrates. Whilst the popularity of nanolime has been growing, its consolidation mechanism still needs to be fully understood when applied to highly porous substrates. The aim of this paper is to compare the three available nanolime products in terms of consolidation efficacy on lime mortar specimens. It is shown that repeated applications of a low concentrated nanolime can increase the superficial cohesion and the mechanical strength of the mortar within 1 cm from the surface, while also reducing porosity, number of micro-pores and capillary water absorption coefficient. Nanorestore Plus® yielded the highest short-term consolidation effect. However, L’Aquila nanolime showed a higher durability which was attributed to a better developed crystalline structure.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2018.06.055