Salt Attack Effects on the Shear Behavior of Masonry: Preliminary Results of an Experimental Campaign

Abstract:

Article Preview

In this paper, preliminary results of an experimental campaign carried out on masonry triplets subjected to weathering cycles in salt solution are presented. Weathering cycles are constituted of a wetting phase by capillary rise of a sodium chloride solution and a drying phase in oven. At the end of the last conditioning cycle, triplets are shear tested in order to quantitatively assess the effects of salts on their mechanical behaviour, in particular on the Mohr-Coulomb relationship. To this aim, three levels of pre-compression are applied during the shear tests. For comparison purposes, unconditioned triplets are also tested under the same loading conditions.

Info:

Periodical:

Edited by:

Angelo Di Tommaso, Prof. Cristina Gentilini and Giovanni Castellazzi

Pages:

512-517

Citation:

C. Gentilini et al., "Salt Attack Effects on the Shear Behavior of Masonry: Preliminary Results of an Experimental Campaign", Key Engineering Materials, Vol. 747, pp. 512-517, 2017

Online since:

July 2017

Export:

Price:

$41.00

* - Corresponding Author

[1] Castellazzi G, Gentilini C, Nobile L. Seismic vulnerability assessment of a historical church: Limit analysis and nonlinear finite element analysis. Adv Civ Eng 2013, art. no. 517454.

DOI: https://doi.org/10.1155/2013/517454

[2] Franzoni E, Sandrolini F, Bandini S. An experimental fixture for continuous monitoring of electrical effects in moist masonry walls. Constr Build Mater 2011; 25: 2023-9.

DOI: https://doi.org/10.1016/j.conbuildmat.2010.11.047

[3] Witzany J, Cejka T, Zigler R. The effect of moisture on significant mechanical characteristics of masonry. Eng Struct Tech 2010; 2: 79-85.

DOI: https://doi.org/10.3846/skt.2010.11

[4] Franzoni E. Rising damp removal from historical masonries: A still open challenge. Constr Build Mater 2014; 54: 123-36.

DOI: https://doi.org/10.1016/j.conbuildmat.2013.12.054

[5] Charola AE. Salts in the deterioration of porous materials: an overview. J Am Inst Conservat 2000; 39: 327-43.

[6] Desarnaud J, Bonn D, Shahidzadeh N. The Pressure induced by salt crystallization in confinement. Scientific Reports; 2016; 6(1).

DOI: https://doi.org/10.1038/srep30856

[7] Lubelli B, de Rooij MR, NaCl crystallization in restoration plasters. Constr Build Mater 2009; 23: 1736–42.

DOI: https://doi.org/10.1016/j.conbuildmat.2008.09.010

[8] Desarnaud J, Derluyn H, Molari L, de Miranda S, Cnudde V, Shahidzadeh N. Drying of salt contaminated porous media: Effect of primary and secondary nucleation. Journal of Applied Physics; 2015; 118(11): 114901.

DOI: https://doi.org/10.1063/1.4930292

[9] Lubelli B, Nijland TG, van Hees RPJ, Hacquebord A. Effect of mixed in crystallization inhibitor on resistance of lime–cement mortar against NaCl crystallization. Constr Build Mater 2010; 24: 2466-72.

DOI: https://doi.org/10.1016/j.conbuildmat.2010.06.010

[10] Castellazzi G, de Miranda S, Grementieri L, Molari L, Ubertini F. Multiphase model for hygrothermal analysis of porous media with salt crystallization and hydration. Materials and Structures; 2016; 49(3): 1039-63.

DOI: https://doi.org/10.1617/s11527-015-0557-y

[11] Wijffels T, Lubelli B. Development of a new accelerated salt crystallization test. Heron 2006; 51: 63-79.

[12] Derluyn H, Janssen H, Carmeliet J. Influence of the nature of interfaces on the capillary transport in layered materials. Constr Build Mater 2011; 25: 3685-93.

DOI: https://doi.org/10.1016/j.conbuildmat.2011.03.063

[13] Yu S, Oguchi CT. Role of pore size distribution in salt uptake, damage, and predicting salt susceptibility of eight types of Japanese building stones. Eng Geo 2010; 115: 226-36.

DOI: https://doi.org/10.1016/j.enggeo.2009.05.007

[14] Andriani GF, Walsh N. The effects of wetting and drying, and marine salt crystallization on calcarenite rocks used as building material in historic monuments. Geological Society, London, Special Publications, 2007; 271: 179-88.

DOI: https://doi.org/10.1144/gsl.sp.2007.271.01.18

[15] Amoroso G, Fassina V. Stone decay and conservation, Atmospheric Pollution, Cleaning. Consolidation and Protection, New York: Elsevier; (1983).

[16] Gentilini C, Franzoni E, Bandini S, Nobile L, Effect of salt crystallisation on the shear behaviour of masonry walls: An experimental study. Constr Build Mater 2012; 37: 181-9.

DOI: https://doi.org/10.1016/j.conbuildmat.2012.07.086

[17] Franzoni, E., Gentilini, C., Graziani, G., Bandini, S. Towards the assessment of the shear behaviour of masonry in on-site conditions: A study on dry and salt/water conditioned brick masonry triplets. Constr Build Mater 2014; 65: 405-416.

DOI: https://doi.org/10.1016/j.conbuildmat.2014.05.002

[18] Jukes P, Riddington JR. The failure of brick triplet test specimens. Masonry International 2001; 15: 30-3.

[19] EN 1052-3. Methods of test for masonry. Part 3: Determination of initial shear strength. (2007).