水泥刨花板快速固化工艺的研究  

Study on Fast Setting Technology for Cement Bonded Particleboard

作　　者：刘义海[1] 陈士英[1] 

机构地区：[1]中国林科院木材工业研究所

出　　处：《木材工业》1997年第4期3-7,20,共6页China Wood Industry

摘　　要：以毛白杨、兴安落叶松和普通硅酸盐水泥为主要原料，采用二氧化碳气体喷射法研究水泥刨花板的快速固化工艺，探讨了水灰比、二氧化碳气体压力、养护条件等对水泥反应特征和水泥刨花板性能的影响。结果表明：最佳制板工艺参数为：ＣＯ２气体压力０．７ＭＰａ，通气时间３ｍｉｎ，木灰比０．２（毛白杨）或０．５（落叶松），水灰比０．３５（毛白杨）或０．４（落叶松）；水灰比不但影响成板的可能性，而且对反应特征和水泥刨花板的力学性能影响显著；ＣＯ２压力在０．５～０．８ＭＰａ之间对刨花板力学性能影响不显著，但对水泥的反应特征具有强烈影响；养护条件与板的最终性能关系密切，充足的水分和碱性环境可以改善刨花板性能；通过二氧化碳气体喷射可以减少或消除木材内含物对水泥固化的阻碍作用；In this study, poplar, larch and Portland cement was used as main raw materials for making cement bonded particleboard(CBP), and a series of experiments was conducted to investigate the curing process of CBP by carbon dioxide injection. In addition, effects of density, particle/cement ratio, water/cement ratio, gas pressure, injection time, etc. on properties of the board were examined, respectively. The results showed as follows: (1) The optimum technological parameters of manufacturing CBP were CO 2 gas pressure of 0.7 MPa; injection time of 3 minutes; particle/cement ratio of 0.2(poplar) or 0.5(larch); water/ cement ratio of 0.35(poplar) or 0.4(larch). (2) Water/cement ratio not only determined the possibility of board formation but also greatly influenced the reaction characteristics and the mechanical properties of CBP. (3) Carbon dioxide pressures between 0.5￣0.8 MPa slightly affected the mechanical properties of CBP, but intensely influenced the reaction characteristics of cement and carbon dioxide. (4) Curing conditions were closely related to the ultimate strength of the board. The curing conditions with sufficient water and alkaline contents could improve the properties of the board. (5) Carbon dioxide injection could reduce or eliminate the detrimental cement curing inhibition of wood extractives. (6) Properties of the CBP showed a great difference from that of conventional CBP.

关 键 词：水泥刨花板 固化工艺 刨花板 

分 类 号：TS653.5[轻工技术与工程]