Plant fibres have been added to stabilize the adobes bricks in order to maximize the use of local resources and save construction costs as well as the energy needed for heating and air conditioning. The primary objective of this work is to produce earthen bricks with high mechanical resistance, great water durability and lower thermal conductivity, in order to improve the increase the housing quality and comfort. In order to do this, raw earth bricks were made from moderately plastic clay soil from Kofila (Burkina Faso) which is made up of quartz (61 wt.%), kaolinite (22 wt.%), illite (7 wt.%), and goethite (6 wt.%). 1.5 cm long kenaf fibres were used to reinforce the raw earth bricks at percentages of 0, 0.2, 0.4, 0.8, and 1.2 wt.%. Kenaf fibres physiochemical and mineralogical properties were assessed, along with the earthen bricks mechanical (flexural and compressive resistance), durability (capillary water absorption and spray test), and physical (apparent density, closed porosity, and thermal conductivity) qualities. The results indicated that the primary constituents of kenaf fibres are cellulose (71 wt.%), hemicelluloses (20 wt.%), lignin (4 wt.%), and ash (2 wt.%). The incorporation of kenaf fibres into adobe bricks effectively reduced crack propagation and enhanced fiber adhesion within the clay matrix. This improvement led to better physical, mechanical, and durability properties in the reinforced adobe bricks. In view of their good water resistance, low thermal conductivity and good mechanical strength, the raw earth bricks produced are suitable for housing construction, particularly in arid regions.
References
[1]
Millogo, Y. and Morel, J.C. (2012) Microstructural Characterization and Mechanical Properties of Cement Stabilised Adobes. Materials and Structures, 45, 1311-1318. https://doi.org/10.1617/s11527-012-9833-2
[2]
Millogo, Y., Hajjaji, M. and Ouedraogo, R. (2008) Microstructure and Physical Properties of Lime-Clayey Adobe Bricks. Construction and Building Materials, 22, 2386-2392. https://doi.org/10.1016/j.conbuildmat.2007.09.002
[3]
Sorgho, B., Bressollier, P., Guel, B., Zerbo, L., Ouedraogo, R., Gomina, M., et al. (2016) étude des propriétés mécaniques des géomateriaux argileux associant la décoction de Parkia Biglobosa (néré). Comptes Rendus. Chimie, 19, 895-901. https://doi.org/10.1016/j.crci.2016.01.016
[4]
Millogo, Y., Aubert, J.E., Séré, A.D., Fabbri, A. and Morel, J.C. (2016) Earth Blocks Stabilized by Cow-Dung. Materials and Structures, 49, 4583-4594. https://doi.org/10.1617/s11527-016-0808-6
[5]
Ouédraogo, M., Bamogo, H., Ouedraogo, R., Sanou, I., Aubert, J.E. and Millogo. Y. (2025) Review: Influence of the Size of Plant Aggregates on the Microstructure, Physical and Mechanical Properties of Stabilised Adobe Blocks. Advances in Materials, 14, 8-23.
[6]
Laborel-Préneron, A., Aubert, J.E., Magniont, C., Tribout, C. and Bertron, A. (2016) Plant Aggregates and Fibers in Earth Construction Materials: A Review. Construction and Building Materials, 111, 719-734. https://doi.org/10.1016/j.conbuildmat.2016.02.119
[7]
Danso, H., Martinson, D.B., Ali, M. and Williams, J.B. (2015) Physical, Mechanical and Durability Properties of Soil Building Blocks Reinforced with Natural Fibres. Construction and Building Materials, 101, 797-809. https://doi.org/10.1016/j.conbuildmat.2015.10.069
[8]
Millogo, Y., Aubert, J.E., Hamard, E. and Morel, J.C. (2015) How Properties of Kenaf Fibers from Burkina Faso Contribute to the Reinforcement of Earth Blocks. Materials, 8, 2332-2345. https://doi.org/10.3390/ma8052332
[9]
Ochi, S. (2008) Mechanical Properties of Kenaf Fibers and Kenaf/PLA Composites. Mechanics of Materials, 40, 446-452. https://doi.org/10.1016/j.mechmat.2007.10.006
[10]
Ouedraogo, M., Dao, K., Millogo, Y., Seynou, M., Aubert, J.E. and Gomina, M. (2017) Influence des fibres de kenaf (Hibiscus altissima) sur les propriétés physiques et mécaniques des adobes. Journal de la Société Ouest-Africaine de Chimie, 43, 48-63. https://www.soachim.info/document/journal-soachim/article/Vol-043Num-1-87da39bfe829a3b97ec28dba205d5154.pdf
[11]
Sanou, I., Bamogo, H., Gnoumou, L.V.L., Dao, K., Ouedraogo, M., Saadi, L., et al. (2024) Kenaf Fibres from Burkina Faso Valorization in the Improvement of Durability, Thermal Properties and Fracture Behavior of Adobes Amended with Cement. Industrial Crops and Products, 219, Article ID: 119077. https://doi.org/10.1016/j.indcrop.2024.119077
[12]
Juárez, C., Guevara, B., Valdez, P. and Durán-Herrera, A. (2010) Mechanical Properties of Natural Fibers Reinforced Sustainable Masonry. Construction and Building Materials, 24, 1536-1541. https://doi.org/10.1016/j.conbuildmat.2010.02.007
[13]
Bouhicha, M., Aouissi, F. and Kenai, S. (2005) Performance of Composite Soil Reinforced with Barley Straw. Cement and Concrete Composites, 27, 617-621. https://doi.org/10.1016/j.cemconcomp.2004.09.013
[14]
Ismail, S. and Yaacob, Z. (2011) Properties of Laterite Bricks Reinforced with Oil Palm Empty Fruit Bunch Fibres. Pertanika Journal of Science and Technology, 19, 33-43. https://fr.scribd.com/document/966945951/JST-PERTANIKA-JST-19
[15]
Tolêdo Filho, R.D., Ghavami, K., England, G.L. and Scrivener, K. (2003) Development of Vegetable Fibre-Mortar Composites of Improved Durability. Cement and Concrete Composites, 25, 185-196. https://doi.org/10.1016/s0958-9465(02)00018-5
[16]
Akil, H.M., Omar, M.F., Mazuki, A.A.M., Safiee, S., Ishak, Z.A.M. and Abu Bakar, A. (2011) Kenaf Fiber Reinforced Composites: A Review. Materials & Design, 32, 4107-4121. https://doi.org/10.1016/j.matdes.2011.04.008
[17]
Jonoobi, M., Harun, J., Tahir, P.M., Shakeri, A., SaifulAzry, S. and Makinejad, M.D. (2011) Physicochemical Characterization of Pulp and Nanofibers from Kenaf Stem. Materials Letters, 65, 1098-1100. https://doi.org/10.1016/j.matlet.2010.08.054
[18]
Godin, B., Ghysel, F., Agneessens, R., Schmit, T., Gofflot, S., Lamaudière, S., Sin-naeve, G., Goffart, J.P., Gerin, P.A., Stilmant, D. and Delcarte, J. (2010) Détermination de la cellulose, des hemicelluloses, de la lignine et des cendres dans diverses cultures lignocellulosiques dédiées à la production de bioéthanol de deuxième génération. Biotechnologie, Agronomie, Société et Environnement, 14, 549-560.
[19]
AFNOR (1996) NF P94-056. Analyse granulométrique par tamisage. 14 p. https://fr.scribd.com/document/591679037/
[20]
AFNOR (1992) NF P94-057. Analyse granulométrique des sols, Méthode par sédimentation. 17 p. https://fr.scribd.com/document/367850660/52230602
[21]
AFNOR (1993) NF P94-051. Détermination des limites d’Atterberg. AFNOR. 15 p. https://fr.scribd.com/document/591678969
[22]
AFNOR (1998) NF P94-068. Mesure de la quantité et de l’activité de la fraction argileuse. Détermination de la valeur de bleu de méthylène d’un sol par l’essai à la tache. 8 p. https://fr.scribd.com/document/639617499
[23]
Yvon, J., Liétard, O., Cases, J.M. and Delon, J.F. (1982) Minéralogie des argiles kaoliniques des Charentes. Bulletin de Minéralogie, 105, 431-437. https://doi.org/10.3406/bulmi.1982.7565
[24]
Bamogo, H., Ouedraogo, M., Sanou, I., Ouedraogo, K.A.J., Dao, K., Aubert, J., et al. (2020) Improvement of Water Resistance and Thermal Comfort of Earth Renders by Cow Dung: An Ancestral Practice of Burkina Faso. Journal of Cultural Heritage, 46, 42-51. https://doi.org/10.1016/j.culher.2020.04.009
[25]
EN 1015-10. (2007) Methods of Test for Mortar for Masonry. Part 10: Determination of Apparent Density of Hardened Mortar. https://fr.scribd.com/document/848257340/4
[26]
Dao, K., Ouedraogo, M., Millogo, Y., Aubert, J.E. and Gomina, M. (2018) Thermal, Hydric and Mechanical Behaviours of Adobes Stabilized with Cement. Construction and Building Materials, 158, 84-96. https://doi.org/10.1016/j.conbuildmat.2017.10.001
[27]
Sanou, I., Seynou, M., Zerbo, L. and Ouedraogo, R. (2019) Mineralogy, Physical and Mechanical Properties of Adobes Stabilized with Cement and Rice Husk Ash. Science Journal of Chemistry, 7, 1-10. https://doi.org/10.11648/j.sjc.20190701.11
[28]
EN 1015-11. (2000) Méthodes d’essai des mortiers pour ma？onnerie-Partie 11: Dé-termination de la résistance en flexion et compression du mortier durci, Septembre. https://fr.scribd.com/document/649622810
[29]
CEN (2009) EN 15801:2009. Conservation of Cultural Property-Test Methods-Determination of Water Absorption by Capillarity. European Standard. Brussels, Belgium. https://www.normsplash.com/BSI/142358621
[30]
Bamogo, H., Gnoumou, L.V.L., Aubert, J. and Millogo, Y. (2023) Influence of Shea Butter Residues on the Physico-Mechanical Properties of Earth Renders. Chemistry Africa, 7, 1337-1352. https://doi.org/10.1007/s42250-023-00847-5
[31]
Ouedraogo, M., Dao, K., Millogo, Y., Aubert, J., Messan, A., Seynou, M., et al. (2019) Physical, Thermal and Mechanical Properties of Adobes Stabilized with Fonio (Digitaria exilis) Straw. Journal of Building Engineering, 23, 250-258. https://doi.org/10.1016/j.jobe.2019.02.005
[32]
AFNOR (2001) NF XP P 13-901. Association fran？aise de normalisation. Ed Blocs de terre comprimée pour murs et cloison. https://fr.scribd.com/document/473581740
[33]
Joussein, E., Petit, S. and Decarreau, A. (2001) Une nouvelle méthode de dosage des minéraux argileux en mélange par spectroscopie IR. Comptes Rendus de l’Académie des Sciences—Series IIA—Earth and Planetary Science, 332, 83-89. https://doi.org/10.1016/s1251-8050(01)01511-7
[34]
Kloprogge, J.T., Frost, R.L. and Hickey, L. (2000) Infrared Emission Spectroscopic Study of the Dehydroxylation of Some Hectorites. Thermochimica Acta, 345, 145-156. https://doi.org/10.1016/s0040-6031(99)00359-7
[35]
Andji, J.Y.Y., Seil, J., Toure, A.A., Kra, G. and Njopwouo, D. (2001) Caractérisation minéralogique de quelques échantillons d’argiles du site de Gounioube (C？te d’Ivoire). Journal de la Société Ouest Africaine de Chimie, 11, 143-166.
[36]
Chakchouk, A., Trifi, L., Samet, B. and Bouaziz, S. (2009) Formulation of Blended Cement: Effect of Process Variables on Clay Pozzolanic Activity. Construction and Building Materials, 23, 1365-1373. https://doi.org/10.1016/j.conbuildmat.2008.07.015
[37]
Omar Sore, S., Messan, A., Prud’homme, E., Escadeillas, G. and Tsobnang, F. (2018) Stabilization of Compressed Earth Blocks (CEBs) by Geopolymer Binder Based on Local Materials from Burkina Faso. Construction and Building Materials, 165, 333-345. https://doi.org/10.1016/j.conbuildmat.2018.01.051
[38]
Hamard, E., Morel, J.C., Salgado, F., Marcom, A. and Meunier, N. (2013) A Procedure to Assess the Suitability of Plaster to Protect Vernacular Earthen Architecture. Journal of Cultural Heritage, 14, 109-115. https://doi.org/10.1016/j.culher.2012.04.005
[39]
Bal, H., Jannot, Y., Quenette, N., Chenu, A. and Gaye, S. (2012) Water Content Dependence of the Porosity, Density and Thermal Capacity of Laterite Based Bricks with Millet Waste Additive. Construction and Building Materials, 31, 144-150. https://doi.org/10.1016/j.conbuildmat.2011.12.063
[40]
Lawane, A., Minane, J.R., Vinai, R. and Pantet, A. (2019) Mechanical and Physical Properties of Stabilised Compressed Coal Bottom Ash Blocks with Inclusion of Lateritic Soils in Niger. Scientific African, 6, e00198. https://doi.org/10.1016/j.sciaf.2019.e00198
[41]
Millogo, Y., Morel, J.C., Aubert, J.E. and Ghavami, K. (2014) Experimental Analysis of Pressed Adobe Blocks Reinforced with Hibiscus Cannabinus Fibers. Construction and Building Materials, 52, 71-78. https://doi.org/10.1016/j.conbuildmat.2013.10.094
[42]
Khedari, J., Watsanasathaporn, P. and Hirunlabh, J. (2005) Development of Fibre-Based Soil-Cement Block with Low Thermal Conductivity. Cement and Concrete Composites, 27, 111-116. https://doi.org/10.1016/j.cemconcomp.2004.02.042
[43]
Laibi, A.B., Poullain, P., Leklou, N., Gomina, M. and Sohounhloué, D.K.C. (2018) Influence of the Kenaf Fiber Length on the Mechanical and Thermal Properties of Compressed Earth Blocks (CEB). KSCE Journal of Civil Engineering, 22, 785-793. https://doi.org/10.1007/s12205-017-1968-9
[44]
Bobet, O., Seynou, M., Zerbo, L., Bamogo, H., Sanou, I. and Sawadogo, M. (2020) Propriétés mécanique, hydrique et thermique de briques en terre crue amendées aux coques d’arachide. Journal de la Société Ouest-Africaine de Chimie, 49, 54-64. https://www.soachim.info/document/journal-soachim/article/Vol-049Num-1-c6e727370ca5ba606011b5a0a7a7ee12.pdf
[45]
Mbumbia, L., Mertens, W.A., Tirlocq, J. and Vandeneede, V. (2000) Influence du processus de fabrication sur les propriétés des briques à base de latérite. Silicates In-dustriels, 65, 101-109. http://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=944738
[46]
Mesbah, A., Morel, J.C., Walker, P. and Ghavami, K. (2004) Development of a Direct Tensile Test for Compacted Earth Blocks Reinforced with Natural Fibers. Journal of Materials in Civil Engineering, 16, 95-98. https://doi.org/10.1061/(asce)0899-1561(2004)16:1(95)
[47]
Ouedraogo, M., Bamogo, H., Sanou, I. and Mazars, V. (2023) Microstructural, Physical and Mechanical Characteristics of Adobes Reinforced with Sugarcane Bagasse. Buildings, 13, Article 117. https://doi.org/10.3390/buildings13010117
[48]
Wade, M., Ba, M. and Ndiaye, M. (2023) Mechanical Characterization of a Block of Compressed Earth, Stabilized with Cement and Reinforced with Typha Fibers. American Journal of Civil Engineering and Architecture, 11, 89-93. https://doi.org/10.12691/ajcea-11-3-4
[49]
Ghavami, K., Toledo Filho, R.D. and Barbosa, N.P. (1999) Behaviour of Composite Soil Reinforced with Natural Fibres. Cement and Concrete Composites, 21, 39-48. https://doi.org/10.1016/s0958-9465(98)00033-x
[50]
Ouedraogo, M., Bamogo, H., Sanou, I., Dao, K., Ouedraogo, K.A.J., Aubert, J., et al. (2022) Microstructure, Physical and Mechanical Properties of Adobes Stabilized with Rice Husks. International Journal of Architectural Heritage, 17, 1348-1363. https://doi.org/10.1080/15583058.2022.2034072
[51]
Huat, B.B.K. and Kazemian, S. (2010) Study of Root Theories in Green Tropical Slope Stability. Electronic Journal of Geotechnical Engineering, 15, 1825-1834. https://www.researchgate.net/publication/245586672_Study_of_root_theories_in_green_tropical_slope_stability
