Research Article

Micromorphological description of vernacular cob process and comparison with rammed earth

  • Erwan Hamard , 1 ,
  • Cécilia Cammas 2 ,
  • Blandine Lemercier 3 ,
  • Bogdan Cazacliu 1 ,
  • Jean-Claude Morel 4
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  • 1. IFSTTAR, MAST, GPEM, F-44344, Bouguenais, France
  • 2. INRAP, UMR 5140, AgroParisTech, F-78850, Thiverval-Grignon, France
  • 3. UMR SAS, AGROCAMPUS OUEST, INRA, F-35042, Rennes, France
  • 4. Faculty of Engineering, Environment and Computing, Centre for the Built and Natural Environment, Coventry University, Coventry, CV1 5FB, UK

Received date: 01 Feb 2019

Revised date: 13 Jun 2019

Accepted date: 14 Jun 2019

Published date: 15 Mar 2020

Copyright

2019 2019 Higher Education Press Limited Company. Production and hosting by Elsevier B.V. on behalf of KeAi. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Abstract

Past builders have developed very low-embodied energy construction techniques optimizing the use of local building materials. These techniques are a source of inspiration for modern sustainable building. Unfortunately, this know-how was orally transmitted and was lost as earth construction fell into disuse during the 20th century in European countries. The absence of written documents makes necessary to use an archaeological approach in order to rediscover these construction strategies. Micromorphological analysis of thin sections collected in earth building walls was used for the first time to describe cob construction technique and highlighted several typical pedofeatures allowing to clearly identifying this process. Finally, a first comparison of the cob and rammed earth micromorphological features permitted to identify two key factors to distinguish these two techniques, the manufacturing state (solid or plastic) and the organization of the material in the wall.

Cite this article

Erwan Hamard , Cécilia Cammas , Blandine Lemercier , Bogdan Cazacliu , Jean-Claude Morel . Micromorphological description of vernacular cob process and comparison with rammed earth[J]. Frontiers of Architectural Research, 2020 , 9(1) : 203 -215 . DOI: 10.1016/j.foar.2019.06.007

Outlines

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