混合纤维砂浆刀口法抗裂性能试验研究  

Experimental study on crack resistance of fiber mortar using knife-edge binding method

作　　者：宫文娟 

机构地区：[1]中国煤炭科工集团沈阳设计研究院建筑二所,辽宁沈阳110015

出　　处：《山西建筑》2013年第11期101-102,共2页Shanxi Architecture

摘　　要：鉴于传统平板法抗裂试验复演性差的缺点,选择刀口约束法进行纤维砂浆的抗裂试验,研究纤维在水泥砂浆中的阻裂效应和影响规律。试验研究表明,纤维掺入使得裂缝产生更短、更细、更少,混掺2.5 kg/m3的长玄武岩纤维B和0.9 kg/m3的杜拉纤维C的试件SP-3抗裂性能最好,而试件SP-4(单掺1.5 kg/m3的短玄武岩纤维A)抗裂性最差,裂缝降低系数仅为0.646。Due to the poor reproducibility of traditional plate method,the new knife-edge binding method is chosen to study the effects and the impact law in the crack resistance of the cement mortar with fiber in it.Experimental studies have shown that fiber is made cracks shorter,more detailed,less long-blending.The specimens SP-3 with 2.5 kg/m3 long basalt fiber B and 0.9 kg/m3 Dura fiber C have the best crack resistance,the worst crack resistance is the specimen SP-4（single-doped 1.5 kg/m3 of short basalt fibers A）,with fracture reduction coefficient of only 0.646.

关 键 词：刀口诱导约束法 玄武岩纤维 杜拉纤维 阻裂 

分 类 号：TU502[建筑科学—建筑技术科学]