挤出成型制备木纤维增强水泥板  

Wood fiber reinforced cement board by extrusion

作　　者：赵金平 俞建华[2] 齐龙浩[2] 李启宏[2] 

机构地区：[1]北新集团建材股份有限公司,北京100096 [2]清华大学,北京100084

出　　处：《新型建筑材料》2009年第8期34-37,共4页New Building Materials

基　　金：国家"十一五"科技支撑计划课题(2006BAJ02B03)

摘　　要：采用机械破碎的木纤维经挤出成型制备纤维增强水泥板材。研究了木纤维掺量对板材抗弯强度及断裂韧性的影响。试验中发现,纤维沿挤出方向并不存在明显的定向分布。采用干湿循环的方法考察了木纤维增强水泥板材的耐久性,发现经过干湿循环后板材的断裂韧性明显降低;同时在经过一定循环次数后,板材强度也开始降低。板材耐久性成为制备机械破碎木纤维增强水泥板必须解决的问题。Fiber-cement board was prepared by extrusion with mechanically pulped wood fibers. The influence on flexure stress and fracture toughness of fiber content was investigated. It is found from the experiment that there is no obvious orientation of fiber along the extrusion direction. Durability of fiber-cement board Was also investigated by wet/dry cycling. Fracture toughness fell rapidly as well as flexure stress after several cycles. Durability became the primary problem to be solved.

关 键 词：木纤维 增强水泥板 挤出成型 耐久性 抗弯强度 断裂韧性 

分 类 号：TU525[建筑科学—建筑技术科学]