纤维自密实水泥基补强材料黏结强度研究  

Research on Shear-bonding Strength of the Fiber Reinforced Self-compacting Cement Material

作　　者：蔡怀森[1] 张凯[1] 郑光和[1] 

机构地区：[1]黄河水利科学研究院,郑州450003

出　　处：《中国农村水利水电》2011年第10期125-128,共4页China Rural Water and Hydropower

基　　金：黄河水利科学研究院中央级公益性科研院所基本科研业务费专项资金(HKY-JBYW-2009-21)

摘　　要：研究了纤维长度、纤维掺量、纤维类型及硅粉对自密实水泥基补强材料黏结抗剪强度的影响。试验用纤维为:PP纤维和PVA纤维。PP纤维长度分别为:3、6、10、12mm。PVA纤维长度为6mm。纤维掺量为0.3、0.5、0.7kg/m3。试验结果表明:掺入3mm和6mm的PP纤维后,与基体材料相比黏结抗剪强度呈降低趋势。掺入10mm和12mm PP纤维后,与基体材料相比黏结抗剪强度呈增强趋势,掺入0.7kg/m3的长度为3mm和6mm的PP纤维后,28d黏结抗剪强度与基体材料相比,分别提高了8.2%和10.8%。相同长度、相同掺量时,掺入PVA纤维后,材料的黏结抗剪强度高于PP纤维。掺入硅粉可以提高补强材料的黏结抗剪强度,1、3、28d提高幅度分别为:28%、35%、27%。The influence of the length of fiber,the fiber content,the type of fiber and Silica fume on shear-bonding strength of the self-compacting cement material are discussed.PP fiber and PVA fiber are used.The lengths of PP fiber are 3,6,10,12 mm respectively,and that of PVA fiber is 6 mm.The fiber contents are 0.3,0.5,0.7 kg/m3,respectively.The results show that after joining PP fiber,the lengths of which are 3,6 mm,shear-bonding strength is lower than that of the base material;The shear-bonding strength of the self-compacting material is reinforced with PP fiber.The shear-bonding strength of the material joining PVA fiber is higher than that of the material joining PP fiber,on the same length of fiber and the same fiber content.The shear-bonding strength increases by joining silica fume.

关 键 词：PP纤维 PVA纤维 硅粉 自密实 黏结抗剪强度 

分 类 号：TU528.572[建筑科学—建筑技术科学]