芳纶纤维砂浆的抗折强度与抗塑性收缩开裂.doc

第 12卷第 1期
2009年 2月

建筑材料学报
J OU RNAL O F BU ILDIN G MA TERIAL S



Vol. 12 , No . 1
Feb. ,2009
文章编号:1007 - 9629 (2009) 01 - 0093 - 04
芳纶纤维砂浆的抗折强度与抗塑性收缩开裂
李国忠, 田颖, 赵帅
(济南大学材料科学与工程学院,山东济南 250022)
摘要::随着芳纶纤维掺量
增加,其水泥砂浆抗折强度、塑性收缩开裂性能均有所提高,掺量为 1. 5 % (体积分数)时,抗折强
度提高了 26. 49 % ,塑性收缩裂缝可减少到 24. 95 %.另外,探讨了芳纶纤维增强水泥砂浆的作用机
理.
关键词:水泥砂浆;芳纶纤维;抗折强度;抗塑性收缩开裂
中图分类号: TU528. 572 文献标识码:A
Flexural Strength and Plastic Shrinkage Cracking
Resistance of Aramid Fiber Cement Mortar
( School of Materials Science and Engineering , University of Jinan , Jinan 250022 , China)
Abstract : The flexural st rengt h and plastic shrinkage cracking resistance of aramid fiber cement mo rtar
were st udied. The test result s show t hat wit h t he increasing volume co ntent of aramid fiber , t he flexural
st rengt h and t he effect of plastic shrinkage cracking resistance can be st rengt hened. When t he fiber volume
co ntent is 1. 5 % , t he flexural st rengt h can be increased to 26. 49 % and t he plastic shrinkage crack can be
reduced to 24. 95 %. The mechanism of aramid fiber s in imp roving mortar’s mechanical performances is
discussed.
Key words : cement mortar ; aramid fiber ; flexural st rengt h ; plastic shrinkage cracking resistance
水泥砂浆具有抗压强度高、本低廉等优点,是泥砂浆性能的作用机理,以期为芳纶纤维在水泥砂
应用最广泛的建筑材料之一,但它同时也存在着抗浆中的应用提供参考.
折强度低、抗冲击性和抗渗性差、易开裂等缺
点[ 1 - 2 ] .纤维