Effect of reinforcement the mortar on adobe walls performance

Document Type : Research Article


Department of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran


Present study investigates an experimental performance of mud brick wall under static lateral
load. The size of bricks was about 22×22×7 cm3 (face × bed × end). For wall specimens, two types mortar
was used: a) non-reinforced mortar, b) reinforcement mortar. For reinforcement mortar many types such as:
metal mesh (mesh size: 0.5 and 0.75 inches), polymeric mesh (mesh size: 10 and 25 mm) and palm fiber
considered was used. First mechanical properties of each types of mortar have been determined. Then the 12
wall with dimensions of 120 × 120 × 22 cm3 are made with six different kinds of mortar. Walls are loaded
under static lateral load in order to evaluate their cracks pattern, load capacities, deformability and energy
absorption characteristics. Cracks in the specimens occurred between the first and the second row that caused
the failure. The mortar was vulnerable part of conventional walls (unreinforced mortar). Ultimate strength
of walls with mortar reinforced by polymer mesh (mesh size was 25 × 25 mm) increased the load and
energy capacity to 83.04% and 158% respectively. The palm fibers increased the load carrying capacity about
82.14% and energy absorption capacity about 247%. Test result was shown that using palm fiber and polymer
mesh with diameter of 25 mm in mortar can increase adobe wall performance.


Main Subjects

[1] A.U. Pope, Introducing Persian Architecture, Soroush press, 1976.
[2] F. Tootoonchy, B. Asgarian, F. Danesh, Experimental in-plane behavior and retrofitting method of mud-brick walls, International Journal of Civil Engineering, 13(2)(2015) 191-201.
[3] A. Garg, H. Yadav, Study of Red Mud as an Alternative Building Material for Interlocking Block Manufacturing in Construction Industry, (2015).
[4] A.A. El-Derby, A. Elyamani, The adobe barrel vaulted structures in ancient Egypt: a study of two case studies for conservation purposes, Mediterranean Archaeology and Archaeometry, 16(1) (2016) 295-315.
[5] M.I. Gomes, M. Lopes, J. De Brito, Seismic resistance of earth construction in Portugal, Engineering Structures,33(3) (2011) 932-941.
[6] J. Revuelta-Acosta, A. Garcia-Diaz, G. Soto-Zarazua, E.Rico-Garcia, Adobe as a sustainable material: A thermal performance, Journal of Applied Sciences(Faisalabad),10(19) (2010) 2211-2216.
[7] H. Binici, O. Aksogan, D. Bakbak, H. Kaplan, B. Isik, Sound insulation of fibre reinforced mud brick walls, Construction and Building Materials, 23(2) (2009) 1035-1041.
[8] Zomarshidi H., “Iranian architecture of traditional materials science” Tehran, Zomorod Publishing, 1390,(In Persian.)
[9] Shpoor, T.; Neeri, A.; “Design masonry buildings” Tehran,science and literature Publishing, 1383, In Persian.
[10] Mirgoozar langerody, M.M., Mirgoozar langerody,S.S. and Rajabi, A. Retrofitting adobe buildings against earthquake, Retrofit National Conference on Iran, Yazd, Yazd University; (1387) , In Persian.
[11] E.L. Tolles III, H. Krawinkler, Seismic studies on smallscale models of adobe houses, (1990).
[12] M. Blondet, G.V. Garcia, S. Brzev, A. Rubiños,Earthquake-resistant construction of adobe buildings:A tutorial, EERI/IAEE world housing encyclopedia,(2003).
[13] L. Turanli, A. Saritas, Strengthening the structural behavior of adobe walls through the use of plaster reinforcement mesh, Construction and Building Materials, 25(4) (2011) 1747-1752.
[14] Oskouei, A.Vatani., M. Afzali. and M. Madadipour.,“Effect of lime and rice husk ash stabilization and compaction on mud brick reinforced with synthetic fibers”, Structural Analysis of Historical Constructions Jerzy Jasieńko (ed) DWE, Proland, 978-83-7125-216-7,2012.
[15] Oskouei, A.Vatani., M. Afzali. and M. Madadipour.,“Effect of some natural additives on the mechanical properties of mud brick”, Structural Analysis of Historical Constructions Jerzy Jasieńko (ed) DWE, Proland, 978-83-7125-216-7, 2012.
[16] Oskouei, A.Vatani., M. Afzali. and M. Madadipour.,“Effect of some synthetic fibers on the mechanical properties of mud brick”, Structural Analysis of Historical Constructions Jerzy Jasieńko (ed) DWE, Proland, 978-83-7125-216-7, 2012.
[17] Ş. Yetgin, Ö. Çavdar, A. Cavdar, The effects of the fiber contents on the mechanic properties of the adobes,Construction and Building Materials, 22(3) (2008) 222-227.
[18] Dowling Dominic., “Improved adobe mud brick”, in application –child-care center construction in El Salvador, 13thWorld Conference on Earthquake Engineering.
[19] ASTM, Volume 04.08, Soil and Rock (I:D420-D5779),March 2003.
[20] V. Maniatidis, P. Walker, A review of rammed earth construction, Innovation Project “Developing Rammed Earth for UK Housing”, Natural Building Technology Group, Department of Architecture & Civil Engineering, University of Bath, (2003).
[21] ASTM, “Stadard test method for total evaporable moisture content of aggregate by drying”, ASTM C566-97, West Conshohocken, PA, USA, 1997.
[22] M. O'dogherty, A review of research on forage chopping, Journal of Agricultural Engineering Research, 27(4)(1982) 267-289.
[23] M. O'Dogherty, J. Huber, J. Dyson, C. Marshall, A study of the physical and mechanical properties of wheat straw,Journal of Agricultural Engineering Research, 62(2)(1995) 133-142.
[24] Nazari, M., Jafari, A., Tabatabaifar, A., Sharifi;Malvajerd, A., Tavakoli, H.; “The effect of moisture content, fast loading and high areas on the tensile strength of alfalfa”, Fifth National Conference on Agricultural Machinery Engineering, Mechanisation Ferdowsi University of Mashhad, 2008.
[25] Islamic Republic of Iran, Iranian National Standardization Organization, Clay brick- Specifications and Test Methods, INSO 7 5th .Revision, 2016,ICS:91.100.15, In Persian.
[26] L. Mbumbia, A.M. de Wilmars, Behaviour of lowtemperature fired laterite bricks under uniaxial compressive loading, onstruction and Building Materials, 16(2) (2002) 101-112.
[27] ASTM C.496-96 : Standard test method for splitting tensile strength of cylindrical concrete speciments.
[28] A.W. Hendry, Structural masonry, Scholium International, 1990.
[29] C. Kouakou, J. Morel, Strength and elasto-plastic properties of non-industrial building materials manufactured with clay as a natural binder, Applied Clay Science, 44(1) (2009) 27-34.
[30] NZ 4297; “Earth Building Association of New Zealand’,Engineering design of earth buildings, New Zealand:EBA, 1998.
[31] Q. Piattoni, E. Quagliarini, S. Lenci, Experimental analysis and modelling of the mechanical behaviour of earthen bricks, Construction and Building Materials,25(4) (2011) 2067-2075.
[32] R. Illampas, D.C. Charmpis, I. Ioannou, Laboratory testing and finite element simulation of the structural response of an adobe masonry building under horizontal loading, Engineering Structures, 80 (2014) 362-376.