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Management and Economics wood
Water repelling Populus Alba by emulsion of paraffin, Quaternary ammonium and hydrated starch

Eiraj Mansoryar; Alinaghi Karimi; Ghanbar Ebrahimi; Ahmad Mirshokraei; Sohrab Rahimi

Volume 25, Issue 2 , September 2018, , Pages 211-222

https://doi.org/10.22092/ijwpr.2010.117290

Abstract
  The water repellency and dimensional stabilization of wood species are important for outdoor uses. In this study, the water absorption and water repelling of poplar wood (Populus Alba) by emulsion of paraffin, Quaternary ammonium and starch, were investigated. Paraffin in three levels of 0%, 3%, 5%, ...  Read More

Evaluation of the properties of wood sawdust-cement perforated blocks

Ali akbar Enayati; Hossein Nazerani hoshmand; Kazem Dost hosseini; Ahmad Jahan latibari; Sohrab Rahimi

Volume 27, Issue 2 , June 2012, , Pages 294-305

https://doi.org/10.22092/ijwpr.2012.117068

Abstract
   In order to study the optimum manufacturing conditions of wood sawdust-cement perforated blocks, sawdust of headrige saw was mixed with portland cement type II, and then perforated blocks were molded from this mixture. The mixture ratios of sawdust to cement were selected as 28:72, 35:65 and 42:58, ...  Read More

Management and Economics wood
Comparison of the quality of poplar lumber in the upper, middle and lower rows of wood drying kiln

Sohrab Rahimi; Mohammad mehdi Faezipoor; Saeid Eshaghi; Asghar Taremian

Volume 26, Issue 2 , June 2011, , Pages 326-338

https://doi.org/10.22092/ijwpr.2011.117190

Abstract
  Poplar lumbers with nominal thickness of 5 cm from Taleghan region, located in west of Karaj were dried under three different schedules including T8-F4 (recommended schedule by F.P.L for poplar), T8-F5 and T9-F4. The purpose of this research was to study the effects of the kiln’s rows (upper, middle, ...  Read More