Preliminary evaluation of the freeze-thaw resistance of hydraulic lime mortars

Title: Preliminary evaluation of the freeze-thaw resistance of hydraulic lime mortars
Author(s): A.H.P. Maurenbrecher, K. Trischuk, M.I. Subercaseaux, G.T. Suter
Paper category : conference
Book title: Workshop Repair Mortars for Historic Masonry
Editor(s): C. Groot
Print-ISBN: None
e-ISBN: 978-2-35158-083-7
Publisher: RILEM Publications SARL
Publication year: 2009
Pages: 266 - 277
Total Pages: 12
Nb references: 8
Language: English

Abstract: This paper describes the results obtained from an initial assessment of mortar used for repointing made with hydraulic limes available in Canada. The emphasis was on resistance to frost damage, a major consideration in Canada’s cold winters. The mortars, all air-entrained to improve frost resistance, were tested as part of small stone masonry specimens to more realistically simulate performance in practice (as opposed to mortar samples on their own). The frost durability was assessed by subjecting the specimens to a uni-directional freeze-thaw test.
The results show hydraulic lime mortars with air entrainment have the potential for good performance in terms of freeze-thaw resistance. Factors which influenced freeze-thaw resistance were the type and source of hydraulic lime, length of initial damp curing, mortar compaction, stone wetting before mortar application, and sand grading.

Online publication: 2009-06-08
Publication type : full_text
Public price (Euros): 0.00