Article (Scientific journals)
Experimental thermophysical dependent mechanical analysis of earth bricks with Canarium schweinfurthii and Cocos nucifera bio-aggregates - A case study in Cameroon
Koungang B.M., Ganou; Mbouendeu J. O., Tchamdjou; Ndapeu D. et al.
2023In Cogent Engineering, 10 (1)
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Keywords :
General Engineering; General Chemical Engineering; earth; brick; stabilisation; bio-aggregates; Cameroon
Abstract :
[en] In order to meet sustainable development goals, global policies are strongly oriented towards the recovery of local materials such as agricultural waste. In this context, a new biosourced compressed earth brick (CEB) has been produced with bio-shell aggregates of Cocos nucifera (CN) and Canarium schweinfurthii (CS), added in equal proportions for various mixtures. The main objective is to study, on one hand, the effect of CN and CS aggregates on the mechanical behaviour and the thermo-physical properties of the CEB. On the other hand, durability of CEB was investigated in terms of hydric stability, abrasion resistance and hygro-thermo-mechanical behaviour. Mixtures were prepared using earthen material and 0, 5, 10 and 15 wt% CNCS, with 8 wt% cement CEM II-B-LL 42.5, respectively. Wet and dry compressive strengths are evaluated versus compaction pressure (2.5, 5, 7 and 10 MPa). The increase of CNCS aggregate content induced a reduction of the compressive strength in both wet a\nd dry situations whatever the compaction pressure. The samples with 5 wt % CNCS and 8 wt % cement, however, offered performances close to reference samples without CNCS aggregates. The reverse trend was found for thermal conductivity: thermal conductivity of the bio-sourced CEB is below 1 W·m−2·K−1 which means good insulating performances. It is noted that the modified CEB have relatively low water absorption, which contribute to a good durability. Hygro- and thermo-mechanical tests showed however a quasi-linear decrease of compressive strength when the humidity of the environment increases but also when the temperature rises. At the end, to obtain more accurate properties by prediction, some machine learning models were used.
Disciplines :
Civil engineering
Author, co-author :
Koungang B.M., Ganou ;  Department of Mechanical Engineering, Enset of Douala, LAboratoire de Mécanique et Matériaux Adaptés (LAMMA), University of Douala, Douala, Cameroon ; GeMMe Building Materials, Urban and Environmental Engineering, University of Liège (Uliège), Liège, Belgium
Mbouendeu J. O., Tchamdjou;  Department of Mechanical Engineering, Enset of Douala, LAboratoire de Mécanique et Matériaux Adaptés (LAMMA), University of Douala, Douala, Cameroon ; Research Unit of Mechanics and Physical Systems Modelling (UR2MSP), Department of Physics, University of Dschang, Dschang, Cameroon
Ndapeu D. ;  Department of Mechanical Engineering, Enset of Douala, LAboratoire de Mécanique et Matériaux Adaptés (LAMMA), University of Douala, Douala, Cameroon ; Research Unit of Mechanics and Physical Systems Modelling (UR2MSP), Department of Physics, University of Dschang, Dschang, Cameroon
Z, Zhao ;  Department of Structural Engineering, College of Civil Engineering, Tongji University, Shanghai, China
G., Tchemou ;  Department of Mechanical Engineering, Enset of Douala, LAboratoire de Mécanique et Matériaux Adaptés (LAMMA), University of Douala, Douala, Cameroon
F., Michel ;  GeMMe Building Materials, Urban and Environmental Engineering, University of Liège (Uliège), Liège, Belgium
Njeugna E. ;  Department of Mechanical Engineering, Enset of Douala, LAboratoire de Mécanique et Matériaux Adaptés (LAMMA), University of Douala, Douala, Cameroon
A., Messan ;  Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD), Institut International d’Ingénierie de l’Eau et de l’Environnement (Institut 2iE), Rue de la Science, Ouagadougou, Burkina Faso
Courard, Luc  ;  Université de Liège - ULiège > Département ArGEnCo > Matériaux de construction non métalliques du génie civil
Language :
English
Title :
Experimental thermophysical dependent mechanical analysis of earth bricks with Canarium schweinfurthii and Cocos nucifera bio-aggregates - A case study in Cameroon
Publication date :
13 February 2023
Journal title :
Cogent Engineering
ISSN :
2331-1916
Publisher :
Informa UK Limited
Volume :
10
Issue :
1
Peer reviewed :
Peer Reviewed verified by ORBi
Development Goals :
11. Sustainable cities and communities
Funders :
ARES CCD - Academy for Research and Higher Education. Development Cooperation Committee [BE]
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