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Cement-bonded particleboard with a mixture of wheat straw and poplar wood

Cement-bonded particleboard with a mixture of wheat straw and poplar wood

作     者:Morteza Nazerian Vajiihe Sadeghiipanah 

作者机构:Department of Wood and Paper Science and Technology University of Zabol 

出 版 物:《Journal of Forestry Research》 (林业研究(英文版))

年 卷 期:2013年第24卷第2期

页      面:381-390页

核心收录:

学科分类:0830[工学-环境科学与工程(可授工学、理学、农学学位)] 082902[工学-木材科学与技术] 0907[农学-林学] 08[工学] 0829[工学-林业工程] 0901[农学-作物学] 

基  金:supported by Department of Wood and Paper Science and Technology University of Zabol 

主  题:cement-bonded particleboard wheat straw poplar additives setting time physical and mechanical properties 

摘      要:We investigated the hydration behavior and some physical/mechanical properties of cement-bonded particleboard (CBPB) containing particles of wheat straw and poplar wood at various usage ratios and bonded with Portland cement mixed with different levels of inorganic additives. We determined the setting time and compression strength of cement pastes containing different additives and particles, and studied the effects of these additives and particles on thickness swelling, internal bond strength and modulus of rupture of CBPB by using RSM (Response Surface Methodology). The mathematical model equations (second-order response functions) were derived to optimize properties of CBPB by computer simulation programming. Predicted values were in agreement with experimental values (R2 values of 0.93, 0.96 and 0.96 for TS, IB and MOR, respectively). RSM can be efficiently applied to model panel properties. The variables can affect the properties of panels. The cement composites with bending strength 〉 12.5 MPa and internal bond strength 〉 0.28 MPa can be made by using wheat straw as a reinforcing material. Straw particle usage up to 11.5% in the mixture satisfies the minimum requirements of International Standard, EN 312 (2003) for IB and MOR. The dose of 4.95% calcium chloride, by weight of cement, can improve mechanical properties of the panels at the minimum requirement of EN 312. By increasing straw content from 0 to 30%, TS was reduced by increasing straw particle usage up to 1.5% and with 5.54% calcium chloride in the mixture, TS satisfied the EN 312 standard.

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