Thermal conductivities of expanded shale and clay lightweight aggregates

This report presents the results of a field evaluation of the thermal conductivity of lightweight clay and shale-based aggregates from stockpiles exposed to outdoor climate conditions. The data indicated that conductivities as low as 0.1 W/m.K may be expected for coarse aggregate. Suggestions for potential applications of the material are included along with possible ways of improving the material.Ce rapport pr\ue9sente les r\ue9sultats d?une \ue9valuation in situ de la conductibilit\ue9 thermique des granulats \ue0 base d?argiles et de schistes argileux l\ue9gers des piles de stockage expos\ue9es aux conditions climatiques ext\ue9rieures. Les donn\ue9es recueillies ont indiqu\ue9 que des valeurs de conductivit\ue9 aussi faibles que 0,1 W/mK peuvent \ueatre pr\ue9vues dans le cas des gros granulats. Des suggestions d?applications potentielles du mat\ue9riau sont incluses, ainsi que la description de diff\ue9rentes fa\ue7ons possibles d?am\ue9liorer le mat\ue9riau.Peer reviewed: NoNRC publication: Ye