جستجوی مقالات مرتبط با کلیدواژه « Sawdust » در نشریات گروه « منابع طبیعی »

This study was conducted with the objective of investigating the feasibility of making wood-cement using Poplar sawdust and Portland cement. A total of 48bricks were made in the laboratories of Technical Teacher Training Faculty of Somesara based on ratios of sawdust to cement (3:2 and 2:1) and 100×100×100 and 50×50×50mm dimensions. Mass and volume of samples were measured and then density of bricks was calculated. The composites were tested for compressive strength using testing machine. The mean compressive strength values were 1.17 N/mm2 and 1.25 N/mm2 for 100×100×100mm composites with sawdust to cement ratios of 2:1 and 3:2 respectively, and 0.85 N/mm2 and 0.99 N/mm2 for 50×50×50mm composites with sawdust to cement ratios of 2:1 and 3:2 respectively. Soaked composites swelled irrespective of the sawdust to cement ratio. The compressive strength for the soaked bricks was approximately 45% of the dry weight strength. The composite bricks were found to be unfit for paving and medium heavy load wall construction. Due to their light weight, by imparting decorative mosaics they can be used for interior wall paneling and decoration, where minimal wetting is experienced.

In order to study some properties of Wood Plastic Composites made from Lignocellulosic filler and HDPE, panels with rice husk flour and sawdust of wood (as fillers) and raw and waste powder of HDPE( as plastic) with the fiber weight ratio of 60 to 40 were manufactured, using a dry blend/hot press method at constant pressure and temperature. The physical properties such as water absorption and swelling thickness and mechanical properties such as the static bending according to standards of ASTM D-7031-04 and ASTM D-1037 were measured and compared with MDF and particleboard. The results showed that the water absorption and swelling thickness of Wood Plastic Composites in question were less than the MDF and particleboard. The WPCs made from rice husk flour and HDPE waste had the lowest water absorption and swelling thickness in general. The flexural modulus and the bending strength of MDF and particleboard were less than the Wood Plastic Composites.