Combining Brazilian tests on masonry cores and double punch tests for the mechanical characterization of historical mortars

•Novel MDT for mechanical characterization of mortar in existing masonry structures.•Core-drilling of brick and lime mortar masonry walls using dry (no water) procedure.•Brazilian tests on cores varying the inclination of the diametral mortar joint.•Novel micromechanical model for joint interpretati...

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Bibliographic Details
Published in:Construction & building materials 2016-06, Vol.112, p.112-127
Main Authors: Marastoni, Diego, Pelà, Luca, Benedetti, Andrea, Roca, Pere
Format: Article
Language:English
Subjects:
Analysis
Brazilian test
Coring
Double punch test (DPT)
Enginyeria civil
Estructures de murs
Failure envelope
Historical masonry
In-situ sampling
Lime mortar
Masonry
Materials i estructures
Mechanical properties
Minor Destructive Testing (MDT)
Mohr-Coulomb theory
Mortar
Shear strength
Testing
Àrees temàtiques de la UPC
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Summary:•Novel MDT for mechanical characterization of mortar in existing masonry structures.•Core-drilling of brick and lime mortar masonry walls using dry (no water) procedure.•Brazilian tests on cores varying the inclination of the diametral mortar joint.•Novel micromechanical model for joint interpretation of DPT and Brazilian tests.•The model provides reliable estimation of mortar’s mechanical parameters. This research presents a novel integrated methodology for the experimental characterization of historical mortars, including different types of laboratory tests. Different experimental tests on lime mortar brickwork were carried out, including Brazilian tests on core drilled masonry samples with one diametral mortar joint and double punch tests on extracted mortar joints. By representing the mortar’s state of failure on the Mohr’s plane for the different tests, it is possible to estimate the material’s strength envelope through a least square minimization method. The proposed approach can be useful to evaluate the compressive, tensile and shear behaviour of mortar in existing structures.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2016.02.168