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Effects of production and curing conditions on performances of stabilized compressed earth blocks: Kaolinite vs quartz-rich materials

Nshimiyimana, Philbert ; Moussa, Seini Hassan ; Messan, Adamah ; Courard, Luc

Cambridge University Press 2020

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  • Título:
    Effects of production and curing conditions on performances of stabilized compressed earth blocks: Kaolinite vs quartz-rich materials
  • Autor: Nshimiyimana, Philbert ; Moussa, Seini Hassan ; Messan, Adamah ; Courard, Luc
  • Assuntos: chemical reaction ; electrical properties ; Engineering, computing & technology ; Ingénierie, informatique & technologie ; materials availability ; Materials science & engineering ; mixtures ; Science des matériaux & ingénierie ; strenght
  • Notas: Amélioration de la qualité de l'habitat en terre crue au Brukina Faso
    scopus-id:2-s2.0-85091059087
  • Descrição: 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.
  • Editor: Cambridge University Press
  • Data de criação/publicação: 2020
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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