Mécanique des sols; Compressive strength; Effective stress; Failure criterion; Suction; Tensile strength; Unstabilized rammed earth material
Abstract :
[en] Abstract Uniaxial compression tests and indirect tensile tests are performed on compacted clayey silt samples upon varying suctions in order to assess the influence of changes in the relative humidity conditions on the strength of unstabilized rammed earthen building materials. The results show that suction plays an important role on the strength of the material. Also the ability of the Belgian clayey silt to develop sufficient mechanical strength to be used as an unstabilized earthen construction material is demonstrated whatever the relative humidity conditions, excepted the fully water saturated state. The experimental data are interpreted in the context of unsaturated soil mechanics using the generalized effective stress concept. This constitutive framework allows defining a unified failure criterion predicting the strength of the earthen building material as a function of the environmental hygroscopic conditions.
Disciplines :
Civil engineering
Author, co-author :
Gerard, Pierre ; Université de Liège - ULiège > Département ArGEnCo > Géomécanique et géologie de l'ingénieur
Mahdad, Mohamed
Robert McCormack, Alexandre
François, Bertrand ; Université de Liège - ULiège > Urban and Environmental Engineering
Language :
French
Title :
A unified failure criterion for unstabilized rammed earth materials upon varying relative humidity conditions
P.J. Alley Rammed Earth construction New Zealand Eng. 3 6 1948 582
D. Allinson, and M. Hall Hygrothermal analysis of a stabilised rammed earth test building in the UK Energy Build. 42 2010 845 852
E.E. Alonso, N.M. Pinyol, and A. Gens Compacted soil behaviour: initial state, structure and constitutive modelling Géotechnique 63 6 2013 463 478
ASTM D 1557-02. Standard test methods for laboratory compaction characteristics of coil using modified effort.
ASTM D 4767-95. Standard test method for consolidated undrained triaxial compression test for cohesive soils.
J.E. Aubert, A. Fabbri, J.C. Morel, and P. Maillard An earth block with a compressive strength higher than 45 MPa! Constr. Build. Mater. 47 2013 366 369
C. Beckett, D. Ciancio, A review of the contribution of thermal mass to thermal comfort in rammed earth structures, in: 2nd International Conference on Sustainable Built Environment, Sri Lanka, 2012, pp. 12.
A.W. Bishop The principle of effective stress Tecnisk Ukeblad 39 1959 859 863
A.W. Bishop, I. Alpan, G.E. Blight, I.B. Donald, Factors controlling the strength of partly saturated cohesive soils, in: Conference Shear Strength Cohesive Soils, ASCE, 1960, pp. 503-532.
Q.B. Bui, J.C. Morel, S. Hans, and N. Meunier Compression behaviour of nonindustrial materials in civil engineering by three scale experiments: the case of rammed earth Mater. Struct. 42 8 2009 1101 1116
Q.B. Bui, J.C. Morel, B.V. Venkatarama Reddy, and W. Ghayad Durability of rammed earth walls exposed for 20 years to natural weathering Build. Environ. 44 2009 912 919
Q.B. Bui, J.C. Morel, S. Hans, and P. Walker Effect of moisture content on the mechanical characteristics of rammed earth Constr. Build. Mater. 54 2014 163 169
J.H. Bungey, and S.G. Millard Testing of Concrete in Structures 1996 Taylor & Francis
R.J. Chandler, and C.I. Gutierrez The filter paper method of suction measurement Géotechnique 36 1986 265 268
D. Ciancio, and J. Gibbings Experimental investigation on the compressive strength of cored and molded cement-stabilized rammed earth samples Constr. Build. Mater. 28 2012 294 304
P. Delage, M.D. Howat, and Y.J. Cui The relationship between suction and swelling properties in a heavily compacted unsaturated clay Eng. Geol. 50 1998 31 48
D.G. Fredlund, and H. Rahardjo Soil Mechanics for Unsaturated Soils 1993 Wiley New-York
M.R. Hall, and Y. Djerbib Rammed earth sample production: context, recommendations and consistency Constr. Build. Mater. 18 2004 281 286
M.R. Hall Assessing the environmental performance of stabilised rammed earth walls using a climatic simulation chamber Build. Environ. 42 2007 139 145
M.A. Hashemi, T.J. Massart, J.C. Verbrugge, B. François, Influence of the clay content of a lime-treated soil on its compression strength, in: Proceeding of the International Symposium - Ground Improvement Works, vol II, 2012, pp. 365-372.
H. Houben, and H. Guillaud Earth Construction - A Comprehensive Guide second ed. 1996 Intermediate Technology Publications London, UK
R.J. Jardine, A. Gens, D.W. Hight, M.R. Coop, Developments in understanding soil behaviour, in: Advances in Geotechnical Engineering. The Skempton Conference, Thomas Telford, 2004, pp. 103-206.
P.A. Jaquin, C.E. Augarde, D. Gallipoli, and D.G. Toll The strength of unstabilised rammed earth materials Géotechnique 59 5 2009 487 490
J.E. Jennings A revised effective stress law for use in the prediction of the behaviour of unsaturated soils Pore Pressure and Suction in Soils 1960 Butterworths London 26 30
J.E.B. Jennings, and J.B. Burland Limitations to the use of effective stresses in partly saturated soils Géotechnique 12 1962 125 144
C. Jommi, Remarks on the constitutive modelling of unsaturated soils, in: Experimental Evidence and Theoretical Approaches in Unsaturated Soils, Trento, 2000, pp. 139-153.
N. Khalili, F. Geiser, and G.E. Blight Effective stress in unsaturated soils: review with new evidence Int. J. Geomech. 4 2 2004 115 126
L. Laloui, M. Nuth, and B. François Mechanics of unsaturated soils L. Laloui, Mechanics of Unsaturated Materials 2010 Wiley & Sons Inc 29 54
L. Laloui, and M. Nuth On the use of the generalised effective stress in the constitutive modelling of unsaturated soils Comput. Geotech. 36 1-2 2009 20 23
D. Li, and L.N.Y. Wong The Brazilian disc test for rock mechanics applications: review and new insights Rock Mech. Rock Eng. 46 2 2013 269 287
B. Little, and T. Morton Building with Earth in Scotland: Innovative Design and Sustainability 2001 Scottish Executive Central Research Unit Publication
J.C. Morel, A. Mesbah, M. Oggero, and P. Walker Building houses with local materials: means to drastically reduce the environmental impact of construction Build. Environ. 36 2001 1119 1126
M. Nuth, and L. Laloui Effective stress concept in unsaturated soils: clarification and validation of a unified framework Int. J. Numer. Anal. Methods Geomech. 32 7 2008 771 801
J.C. Smith, and C.E. Augarde Optimum water content tests for earthen construction materials Construct. Mater. 167 2 2014 114 123
K. Terzaghi Theoretical Soil Mechanics 1943 Chapman and Hall London
S.K. Vanapalli, D.G. Fredlund, Comparison of empirical procedures to predict the shear strength of unsaturated soils using the soil-water characteristic curve, in: Advances in Unsaturated Geotechnics, GSP 99, ASCE, Reston, 2000, pp. 195-209.
J.C. Verbrugge, R. De Bel, A. Gomes Correia, P.H. Duvigneaud, G. Herrier (2011) Strength and micro observations on a lime treated silty soil, in: Road Materials and New Innovations in Pavement Engineering, pp. 89-96.
P. Walker, R. Keable, J. Martin, and V. Maniatidis Rammed Earth: Design and Construction Guidelines 2005 BRE Bookshop Watford, UK
M.I. Zerhouni, Rôle de la pression interstitielle négative dans le comportement des sols - application au calcul des routes (Ph.D. thesis), Ecole Centrale Paris, 1991.