磷酸镁胶凝材料基体与玻璃纤维筋的粘结性能  

Bond behavior of magnesium phosphate cement matrix and glass fiber bar

作　　者：周序洋[1,2] 杨建明[3] 王进 

机构地区：[1]江苏广播电视大学建筑工程系,江苏南京210019 [2]南京建工集团有限公司,江苏南京200012 [3]盐城工学院土木工程学院,江苏盐城224051

出　　处：《江苏大学学报（自然科学版）》2012年第6期730-735,共6页Journal of Jiangsu University：Natural Science Edition

基　　金：住房和城乡建设部科研开发项目(2011-K4-23)

摘　　要：为研究磷酸镁胶凝材料(MPC)基体与玻璃纤维筋的粘结性能,测试了玻璃纤维筋在MPC基体中的拉拔力.结果表明:自制无机胶能较好渗入玻璃纤维筋内部,并将纤维丝牢固地粘结在一起,玻璃纤维筋的轴向拉力显著提高;用掺入适量死烧氧化镁粉的无机胶浸涂玻璃纤维筋,可明显增大玻璃纤维筋在MPC基体中的拉拔力;适量水玻璃可使MPC的结构更加致密,其中玻璃纤维筋的拉拔力亦适当提高;随着玻璃纤维筋埋置长度的增加和MPC基体龄期的延长,玻璃纤维筋的拉拔力逐步提高;存在最佳的玻璃纤维筋埋置长度使玻璃纤维筋拉拔破坏时的拉拔力达到最大;经优化设计的玻璃纤维筋在MPC基体中的拉拔力高于在环氧树脂基体中的拉拔力.Bond behaviors of magnesium phosphate cement（MPC） matrix with glass fiber bundle（GFB） were investigated through measuring pullout force of GFB in MPC.The results show that the self-made inorganic adhesive can permeate into glass fibrils with markedly improved axial tensile strength of GFB.The pull-out force of GFB can be increased by mixing magnesium oxide powder.The micro structure of MPC paste is compacted by water glass to achieve pull-out force of GFB.The pull-out force can be effectively improved by the increasing of GFB length and MPC age.It can be confirmed that the optimized embedded length of GFB would exist and the maximum pull-out forces could be achieved in pullout destructive form.The pull-out force of GFB in MPC matrix with optimized embedded length is greater than that in epoxy resin matrix.

关 键 词：磷酸镁胶凝材料 水玻璃 玻璃纤维筋 粘结强度 拉拔力 

分 类 号：TU528[建筑科学—建筑技术科学]