Modeling of Deformations of Fine Clayey Soils Stabilized Using Sugar Cane Molasses: Extension of the Ferber Model

Nice Ngouallat Mfoutou¹, Narcisse Malanda^1, , Jarlon Brunel Makela¹ and Paul Louzolo-Kimbembe¹

¹Polytechnic National Superior School, Marien Ngouabi University, Brazzaville, Congo

Cite this paper:
Nice Ngouallat Mfoutou, Narcisse Malanda, Jarlon Brunel Makela and Paul Louzolo-Kimbembe. Modeling of Deformations of Fine Clayey Soils Stabilized Using Sugar Cane Molasses: Extension of the Ferber Model. American Journal of Materials Science and Engineering. 2021; 9(1):6-14. doi: 10.12691/ajmse-9-1-2

Abstract

This work presents a theoretical study based on the instability of fine soils stabilized with sugar cane molasses. Indeed, this stabilization is only effective during the dry season in the town of Nkayi due to the scarcity or non-existence of rainfall. This being the case, let us suppose that humidification influences the intrinsic parameters of the earth materials (suction, porosity) and even the stabilization capacity of the molasses, we can try to understand the instability phenomenon that occurs within the structural matrix of the material when it is solicited during periods of heavy rainfall. The current models which study the deformation of the proposed fine soils, relate the inter-aggregate voids, the intra-aggregate voids, the stability index, the suction of the soil material and the relative humidity of the environment. Also, the theoretical study of these models shows that the inter-aggregate voids increase with relative humidity, the intra-aggregate voids decrease with increasing relative humidity and the stability index decreases with increasing relative humidity.Similarly, inter-aggregate voids decrease with increasing suction, intra-aggregate voids increase with suction and the stability index increases with suction.However, with the extension of Ferber's model, the breaking point of the earth material is obtained using these same models, i.e. this minimum point beyond which the adhesion forces in the aggregate and between the aggregates become low to ensure cohesion between the aggregates in the material for a long time. All in all, this point is significant for Pr (=35.768%, =0.5262, =0.078, = 0.0005 262), and S=146 MPa (suction value) and is defined as the breaking point below which the cohesion of the aggregates is not evident. This proposed model mathematically translates both the effects of relative humidity and suction on voids in earth materials. It also explains the deformations that take place in earth materials at the microstructure level (intra-aggregate voids and inter-aggregate voids) under the effect of moisture or suction.

Keywords:
fine clay soils sugar cane molasses modelling aggregate void deformation

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References:

[1]	Narcisse Malanda, Paul Louzolo-Kimbembe, Yannick Destin Tamba-Nsemi (2017), Etude des caractéristiques mécaniques d’une brique en terre stabilisée a l’aide de la mélasse de canne à sucre. Revue du CAMES - Sciences Appliquées et de l’ingénieur Cames 2017 - Published Online 2017 http://publication.lecames.org/Vol. 2(2), pp. 19, Online January 2018 ISSN 2312-8712 December 2017.
[2]	Malanda N, Nguono Ngakali G, Ganga G, Elenga R G, Nzingoula V and Louzolo-Kimbembe P (2019). Experimental study and effects of the drying kinetics of stabilized earth bricks based on sugar cane molasses. Asia journal of sciences and technoloy ISSN : 0976-3376, vol. 10, ISSUE, 10, pp. 10380-10391, Available online at http:// 2019
[3]	Samba, G and Nganga, D. « Raind fall variability in Congo-Brazzaville 1932-2007 » (2011). Int. J. Climatol. Published online in Ziley
[4]	IPCC Fourth assessment report : climate change 2007 (AR4). IPCC, Geneva, Switzerland, 2007
[5]	Thanh Danh Tran (2014), Rôle de la microstructure des sols argileux dans les processus de retrait-gonflement: de l’échelle d’éprouvette à l’échelle de la chambre environnementale. Thèse de l’école nationale supérieure des mines de paris, spécialité: géologie de l’ingénieur. Online at https:// core.ac.uk/downlord/pdf/51225233.pdf
[6]	Ghanem Fadhila (2011), Etude de la corrélation´ entre la perméabilité et la succion. Online at https:// dl.ummto.dz/bitstream/handle/ummto/799/Ghanem
[7]	Roland PLASSART (2011), Modélisation hydromécanique du comportement des ouvrages souterrains avec un modèle elastoviscoplastique. Thèse de l’institut national polytechnique de Lorraine. Spécialité: Mécanique - Génie Civil. Online at NPL050N
[8]	Hossein Nowamooz (2007), Retrait/gonflement des sols argileux compacts et naturels. Thèse de doctorat de l’Institut national polytechnique de Lorraine spécialité: génie civil - hydrosystemes - géotechnique.
[9]	Marwen Bouasker (2007), Etude numérique et´ expérimentale du retrait endogène au très jeune âge des pâtes de ciment avec et sans inclusions. Thèse de doctorat de l’Université de Nantes, spécialité: génie civil.
[10]	Jad Wakim (2005), Influence des solutions aqueuses sur le comportement mécanique des roches argileuses. Thèse de doctorat de l’école nationale supérieure des mines de paris spécialité: technique et économie de l’exploitation du sous-sol.
[11]	Tatiana Maison (2011), Analyse à l’échelle microscopique des phénomènes d’humectation et de dessiccation des argiles. Thèse de l’école centrale des arts et manufactures, école centrale Paris.
[12]	Faycal EL Fgaier (2013), conception, production et qualification des briques en terre cuite et en terre crue. Thèse de doctorat délivrée par l’école centrale de Lille. (Source https://tel.archivesouvertes.fr).