MICROWAVE DRYING OF WOOD-CEMENT COMPOSITES

摘要

In the paper the microwave drying of wood-cement composite boards of the densities 400 kg.m-3, 700 kg.m-3 and 1100 kg.m-3 was studied. The wood-cement boards were both without admixtures and with the admixture of carbon. High power density of the electromagnetic field was used. The drying speed varied between 1.7 and 14 (%.min-1). No damages such as cracks, shape changes, or decrease of mechanical strength at the bend were observed. It may be stated that by means of microwave drying, it is possible to reduce the time of finalizing wood-cement boards without any noticeable changes in their quality.