Determination of Mohr–Coulomb failure envelope, mechanical properties and UPV of commercial cement-lime mortar

Amrit Ghimire; Sarkar Noor-E-Khuda; Shah Neyamat Ullah; Thuraichamy Suntharavadivel

doi:10.1617/s11527-022-01959-z

Determination of Mohr–Coulomb failure envelope, mechanical properties and UPV of commercial cement-lime mortar

Amrit Ghimire, Sarkar Noor-E-Khuda, Shah Neyamat Ullah, Thuraichamy Suntharavadivel

Research output: Contribution to journal › Article › peer-review

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Abstract

Mortar in masonry structures can be subjected to both uniaxial and triaxial loading. Determining the mechanical properties and/or failure criteria of the commonly used mortar is necessary for the structural performance assessment of new and existing masonry buildings using non-destructive testing and/or finite element modelling methods. In this paper, the stress–strain behaviour of a commercially available cement-lime mortar is investigated under uniaxial and triaxial loading. The axial compressive strength, modulus of elasticity, Mohr–Coulomb failure envelopes of the mortar are determined over a range of conditions. Mortar specimens were prepared with a water to cementitious material ratio (w/cm) of 0.6–0.7 and were tested at curing ages of 3, 7, 14, and 28 days, under confining pressures of 0, 100, 250, 500 and 750 kPa. Ultrasonic pulse velocity (UPV) of the specimens were measured before the destructive testing. The results indicate that the influence of curing age and confining pressure on the axial compressive strength of the mortar can be predicted using proposed linear correlations between (i) The confining pressure and the axial compressive strength and (ii) The UPV and the axial compressive strength. From the test results, the strength parameters of the Mohr–Coulomb failure criterion were also determined. It is observed that cohesion is more sensitive to changes in curing age and w/cm than the friction angle, which varied between 32 and 33 degrees.

Original language	English
Article number	111
Number of pages	19
Journal	Materials and Structures/Materiaux et Constructions
Volume	55
Issue number	4
DOIs	https://doi.org/10.1617/s11527-022-01959-z
Publication status	Published - 16 Apr 2022
Externally published	Yes

Bibliographical note

This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

Funder

Funding Information:
The authors acknowledge the experimental support provided by Dr Andrei Costache and CQUniversity.

Keywords

Mohr–Coulomb criteria
Mortar
Stress–strain
Triaxial loading
Uniaxial loading
UPV

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
Materials Science(all)
Mechanics of Materials

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10.1617/s11527-022-01959-z

PublishedFinal published version, 3.06 MBLicence: CC BY

Cite this

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abstract = "Mortar in masonry structures can be subjected to both uniaxial and triaxial loading. Determining the mechanical properties and/or failure criteria of the commonly used mortar is necessary for the structural performance assessment of new and existing masonry buildings using non-destructive testing and/or finite element modelling methods. In this paper, the stress–strain behaviour of a commercially available cement-lime mortar is investigated under uniaxial and triaxial loading. The axial compressive strength, modulus of elasticity, Mohr–Coulomb failure envelopes of the mortar are determined over a range of conditions. Mortar specimens were prepared with a water to cementitious material ratio (w/cm) of 0.6–0.7 and were tested at curing ages of 3, 7, 14, and 28 days, under confining pressures of 0, 100, 250, 500 and 750 kPa. Ultrasonic pulse velocity (UPV) of the specimens were measured before the destructive testing. The results indicate that the influence of curing age and confining pressure on the axial compressive strength of the mortar can be predicted using proposed linear correlations between (i) The confining pressure and the axial compressive strength and (ii) The UPV and the axial compressive strength. From the test results, the strength parameters of the Mohr–Coulomb failure criterion were also determined. It is observed that cohesion is more sensitive to changes in curing age and w/cm than the friction angle, which varied between 32 and 33 degrees.",

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Determination of Mohr–Coulomb failure envelope, mechanical properties and UPV of commercial cement-lime mortar

Abstract

Bibliographical note

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Keywords

ASJC Scopus subject areas

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