摘要
选取不同纤维长度、不同尺度(单一或多种长度混合)、掺量、掺入方式、分散剂作为影响因素进行纤维分散性试验研究,运用图像法及水洗法分别对聚乙烯醇(PVA)纤维在水中和水泥砂浆中分散性能进行研究,探讨各因素对PVA纤维分散性影响规律及提高纤维分散性的调控方法。结果表明:PVA纤维长度为8mm时,分散性能最好;相同掺量时,多种长度混合纤维的分散性不如单尺度纤维分散性;分散剂对PVA纤维在水中分散性影响较小;在水泥砂浆中,纤维掺量越少、长度越短,纤维分散性越好。
Different fiber lengths,different scales(single or multiple lengths mixed),dosage,blending method and dispersant were selected as influencing factors to conduct fiber dispersibility test.The dispersion properties of polyvinyl alcohol(PVA)fiber in water and cement mortar were studied by image method and washing method respectively.The influence of various factors on the dispersibility of PVA fiber and the regulation methods to improve the dispersibility of fiber were discussed.The results show that the dispersion properties of PVA fiber is the best when the length of PVA fiber is 8mm.At the same dosage,the dispersibility of mixed fibers of multiple lengths is not as good as that of single scale fibers.Dispersant has little effect on dispersibility of PVA fiber in water.In cement mortar,the less fiber content,the shorter the length,the better the fiber dispersibility.
作者
李家兴
杨勇新
贾彬
黄辉
赵进阶
李文枭
王涛
武玉杭
LI Jiaxing;YANG Yongxin;JIA Bin;HUANG Hui;ZHAO Jinjie;LI Wenxiao;WANG Tao;WU Yuhang(College of Civil Engineering and Architecture,Southwest University of Science and Technology,Mianyang 621010,China;Central Research Institute of Building and Construction Co.,Ltd.MCC Group,Beijing 100088,China;School of Human Settlements and Civil Engineering,Xi′an Jiaotong University,Xi′an 710049,China)
出处
《建筑结构》
北大核心
2023年第12期91-97,共7页
Building Structure
基金
“十三五”国家重点研发计划项目(2016YFB0303201)
国家自然科学基金项目(51908476)
四川省科技计划项目(2020JDTD0021)
中冶建筑研究总院有限公司资助重大课题(YCK2017KY01)。
关键词
纤维混凝土
图像法
水洗法
聚乙烯醇纤维
分散性
fiber concrete
image method
washing method
polyvinyl alcohol fiber
dispersibility
