Chromated copper arsenate (CCA) and copper, chromium and boron (CCB) have been widely used in pressure treated wood as a heavy duty preservative to protect wood against insects and fungi for more than 60 years. Although many attempts have been done to solve the problems related to out-service treated wood, the problem still remains. Only a few studies were done to utilize the out-of service treated wood materials to produce WPCs. The objective of this study was to determine the mechanical, physical and thermal properties of WPCs produced from remediated CCA/CCB and CCA/CCB wood flour without remediation. The results showed that The water absorption values for the WPCs produced from remediated CCA or CCB wood flour were higher than that of CCA or CCB wood sawdust; however, lower than the WPCs produced from virgin pine flour. The mechanical properties of WPCs produced from either CCA or CCB wood flour were higher than that of produced from virgin pine wood floor. Thermal properties of WPCs were also determined.

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