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

编号 zgly0000818208

文献类型 期刊论文

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

作者 Morteza  Nazerian  Vajiihe  Sadeghiipanah 

作者单位 Department  of  Wood  and  Paper  Science  and  Technology 

母体文献 林业研究: 英文版 

年卷期 2013(2)

页码 381-390

年份 2013 

分类号 S 

关键词 cement-bonded  particleboard  wheat  straw  poplar  additives  setting  time  physical  and  mechanical  properties 

文摘内容 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.