بررسي خواص فيزيكي و مكانيكي تخته خرده چوب سيمان ساخته شده از تراورس بازيافتي راه آهن

Investigation on physical and mechanical properties of cement bonded particleboard manufactured from recycled railroad sleepers

In order to investigate physical and mechanical properties of cement bonded particleboard manufactured from recycled rail road sleepers, this study has been conducted. In this study six treatments including effect of temperature (at two levels: 25 °C and 60 °C) and calcium chloride as additive (at 3 levels: 3%, 5% and 7%) on cement boards properties were studied. One-layer boards with density of 1 gr/cm3 and 15 mm thick were manufactured. Three boards were also manufactured as control boards using normal particles, cement and 7 percent chloride (based on dry weight of cement). Physical and mechanical properties of manufactured boards including modulus of rupture, modulus of elasticity, internal bond, water absorption, and thickness swelling were measured and compared with control boards. Collected data were analyzed. There were significant differences (with 95 percent confidence) among manufactured boards. Since manufactured boards at 25 °C and using 7 percent calcium chloride had high mechanical properties and less water absorption and thickness swelling compared with those manufactured at 60 °C using 3 percent calcium chloride, therefore their manufacturing conditions are recommendable for industrial application.