Abstract
There is an increasing demand for earth construction in the world today but there is no consensus on the procedure to be used to measure the compressive strength of earth bricks. The study presented in this paper aims to propose a test procedure specific to earth bricks that would give the most realistic value of compressive strength while remaining as simple as possible. This study focused on four different bricks and consisted of measuring the compressive strength of these specimens by varying several parameters: specimen size, orientation, use of Teflon capping or not, and tests on dry sawn specimens, on half-bricks or on entire bricks. The results of the study show that the best compromise to achieve a simple and representative compressive strength test for earth bricks is to transform the bricks as little as possible before the test and thus to test entire bricks.
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References
Aubert JE, Fabbri A, Morel JC, Maillard P (2013) An earth block with a compressive strength higher than 45 MPa! Constr Build Mater 47:366–369
Australian Standard (2002) Standards Australia handbook 194. The Australian earth building handbook. Standards Australia, Sydney
Bourret J (2012) Elaboration de céramiques alvéolaires à base de kaolin: propriétés thermiques et mécaniques, PhD thesis, GEMH-ENSCI, Limoges
Standard British (1992) BS 5628-1: code of practice for use of masonry—part 1: structural use of unreinforced masonry. British Standard Institution, London
Bui QB, Morel JC, Hans S, Walker P (2014) Effect of moisture content on the mechanical characteristics of rammed earth. Constr Build Mater 54:163–169
European Standard (2000) EN 772-1: methods of test for masonry units—part 1: determination of compressive strength. European Committee for Standardization, Brussels
European Standard (2004) EN 206-1: concrete: specification, performance, production and conformity. European Committee for Standardization, Brussels
French Standard (2001) XP P13901: Blocs de terre comprimée pour murs et cloisons: definitions, specifications, méthodes d’essai et conditions de réception. Association Française de Normalisation (Afnor)
Standard German (2013) DIN 18945: Lehmsteine—Begriffe, Anforderungen, Prüfverfahren. Deutsches Institut für Normung, Berlin
Hakimi A, Yamani A, Ouissi H (1996) Rapport: Résultats d’essais de résistance mécaniques sur échantillons de terre comprimée. Mater Struct 29:600–608
Heathcote K, Jankulovski E (1992) Aspect ratio correction factors for soilcrete blocks. Trans Inst Eng Aust Civil Eng 34:309–312
Jacqus G, Berger S, Gibiat V, Jean P, Villot M, Ciukaj S (2011) A homogenised vibratory model for predicting the acoustic properties of hollow brick wall. J Sound Vib 330:3400–3409
Jaquin PA, Augarde CE, Gallipoli D, Toll DG (2009) The strength of unstabilised rammed earth materials. Géotechnique 59:487–490
Kornmann M (2007) Clay bricks and rooftiles, manufacturing and properties. Editions Septima, Paris
Krefeld WJ (1938) Effect of shape of specimen on the apparent compressive strength of brick masonry. In: Proceedings of the American Society of Materials, Philadelphia p 363–369
Maillard P, Aubert JE (2014) Effects of the anisotropy of extruded earth bricks on their hygrothermal properties. Constr Build Mater 63:56–61
Maskell D, Heath A, Walker P (2013) Laboratory scale testing of extruded earth masonry units. Mater Design 45:359–364
Morel JC, Pkla A (2002) A model to measure compressive strength of compressed earth blocks with the three point bending test. Constr Build Mater 16:303–310
Morel JC, Pkla A, Walker P (2007) Compressive strength testing of compressed earth blocks. Constr Build Mater 21:303–309
Morel JC, Aubert JE, Millogo Y, Hamard E, Fabbri A (2013) Some observations about the paper ‘‘Earth construction: lessons from the past for future eco-efficient construction’’ by F. Pacheco-Torgal and S. Jalali. Constr Build Mater 44:419–421
New Zealand Standard (1998) New Zealand Standard 4298: materials and workmanship for earth buildings. Standards New Zealand, Wellington
Olivier M, Mesbah A, El Gharbi Z, Morel JC (1997) Mode opératoire pour la réalisation d’essais de résistance sur blocs de terre comprimée. Mater Struct 30:515–517
Pkla A (2002) Caractérisation en compression simple des blocs de terre comprimée (btc): application aux maçonneries btc-mortier de terre. PhD thesis, INSA, Lyon
Silveira D, Varum H, Costa A (2013) Influence of the testing procedures in the mechanical characterization of adobe bricks. Constr Build Mater 40:719–728
Spanish Standard (2008) UNE 41410: Bloques de tierra comprimada para muros y tabiques: definiciones, especificaciones y métodos de ensayo. Asociación Española de Normalización y Certificación
Venkatarama Reddy BV, Rao SM, Arun Kumar MK (2003) Characteristics of stabilised mud blocks using ash-modified soils. Indian Concr J 77:903–911
Vilane BRT (2010) Assessment of stabilisation of adobes by confined compression tests. Biosyst Eng 106:551–558
Walker P (1995) Strength, durability and shrinkage characteristics of cement stabilised soil blocks. Cem Concr Comp 17:301–310
Walker P (1996) Specification for stabilized pressed earth blocks. Mason Int 10:1–6
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Aubert, J.E., Maillard, P., Morel, J.C. et al. Towards a simple compressive strength test for earth bricks?. Mater Struct 49, 1641–1654 (2016). https://doi.org/10.1617/s11527-015-0601-y
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DOI: https://doi.org/10.1617/s11527-015-0601-y