文档介绍：Cement and Concrete Research, Vol. 28, No. 8, pp. 1179–1190, 1998
Copyright © 1998 Elsevier Science Ltd
Printed in the USA. All rights reserved
0008-8846/98 $
PII S0008-8846(98)00075-1
EFFECT OF MICROSTRUCTURE ON THE MECHANICAL AND THERMAL
PROPERTIES OF LIGHTWEIGHT CONCRETE PREPARED FROM CLAY,
CEMENT, AND WOOD AGGREGATES
A. Bouguerra,* A. Ledhem,* F. de Barquin,† . Dheilly,‡ and M. Que´neudec‡
*Universite´ de Rennes 1, IUT de Rennes 1, . 1144, 3, rue du Clos Courtel,
35014 Rennes Ce´dex, France
†Centre Scientifique et Technique de la Construction, Division Mate´riaux, Av. Pierre
Holoffe 21, 1342 Limelette, Belgique
‡Laboratoire Baˆtiment:Universite´ de Picardie Jules Verne, IUT, De´partement Ge´nie Civil,
Avenue des Faculte´s, Le Bailly, 80025 Amiens Ce´dex 01, France
(Received December 2, 1997; in final form May 11, 1998)
ABSTRACT
Wood concretes of a clayey matrix are considered herein from the standpoint
of developing insulation materials through reliance on local resources and
reusing industrial mineral wastes. Both the mechanical and thermal properties
of these materials depend heavily on their microstructure and, in particular, on
their porous structure which the authors have identified initially. An experi-
mental study of pression resistance as well as of the thermal conduc-
tivity in the dry state and at ambient temperature shows the changes in these
characteristics as a function of porosity. parison with theoretical models
previously tested for other types of cellular materials has served to validate its
application in the case of wood concretes of a clayey matrix. © 1998 Elsevier
Science Ltd
Introduction
The term wood concrete indicates posite material posed of a mineral
matrix, possibly an admixture, and vegetable aggregates. These plant-based aggregates
exhibit a parable to that of conventional aggregates, yet with lower aggregate
limits in the case of coarser aggregates. The standard