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Effect of production and curing conditions on the performance of stabilized compressed earth blocks: Kaolinite vs quartz-rich earthen material

Published online by Cambridge University Press:  05 March 2020

Philbert Nshimiyimana ,
Hassan Seini Moussa ,
Adamah Messan  and
Luc Courard
Philbert Nshimiyimana*
Affiliation:
Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD), Institut International d’Ingénierie de l’Eau et de l’Environnement (Institut 2iE), Rue de la Science, 01, BP 594 Ouagadougou 01, Burkina Faso. Urban and Environmental Engineering (UEE), Université de Liège (ULiege), Allée de la Découverte, 9, 4000 Liège, Belgium.
Hassan Seini Moussa
Affiliation:
Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD), Institut International d’Ingénierie de l’Eau et de l’Environnement (Institut 2iE), Rue de la Science, 01, BP 594 Ouagadougou 01, Burkina Faso.
Adamah Messan
Affiliation:
Laboratoire Eco-Matériaux et Habitats Durables (LEMHaD), Institut International d’Ingénierie de l’Eau et de l’Environnement (Institut 2iE), Rue de la Science, 01, BP 594 Ouagadougou 01, Burkina Faso.
Luc Courard
Affiliation:
Urban and Environmental Engineering (UEE), Université de Liège (ULiege), Allée de la Découverte, 9, 4000 Liège, Belgium.
*
*Corresponding author: Philbert Nshimiyimana; pnshimiyimana@doct.uliege.be.
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Abstract

This study investigated the effect of production and curing parameters on the mechanical performance of compressed earth blocks (CEBs) stabilized with 0-20 wt % CCR (calcium carbide residue). Kaolinite (K) and quartz (Q)-rich earthen materials were mixed with the CCR and used to mould CEBs at optimum moisture content (OMC) and OMC+2 % of the dry mixtures, cured at 20 °C, ambient temperature in the lab (30±5 °C) and 40 °C for 0-90 days. After curing, the reactivity of the materials and compressive strength of dry CEBs were tested. Increasing the moulding moisture from OMC to OMC+2 decreased the compressive strength 0.3 times (4.4 to 3.3 MPa) for the CEBs stabilized with 20 % CCR cured at 30±5 °C for 45 days. Similarly, the compressive strength (4.4 MPa) was reached by CEBs stabilized with 10 and 20 % CCR after 28 and 45 days of curing, respectively. At 40 °C, the compressive strength increased 3.3 times (1.1 to 4.7 MPa with 0 to 20 % CCR) for K-rich and 2.5 times (2 to 7.1 MPa) for Q˗rich materials. At 20 °C, the compressive strength increased only 1.3 times (1.1 to 2.5 MPa) for K˗rich and barely 0.7 times (2 to 3.4 MPa) for Q-rich materials. These suggest that CCR is useful for stabilization and improving the performances of CEBs in hot regions.

Keywords

chemical reactionelectrical propertiesmaterial availabilitymixturestrength
Type
Articles
Information
MRS Advances , Volume 5 , Issue 25: African Materials Research Society 2019 , 2020 , pp. 1277 - 1283
Copyright
Copyright © Materials Research Society 2020

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