剑麻纤维砂浆抗渗防裂性能试验.pdf

第34卷第2期
土木工程与管理学报
2017年3月
Journal of Civil Engincering and Management
Mar.2017
剑麻纤维砂浆抗渗防裂性能试验
小丽
李丽平
武汉に程科技学院程学院,湖北武汉430200:2.中国地质大学じ程学院,湖北武汉430074
摘要:为研究普通水泥砂浆摻入剑麻纤维后抗渗防裂性能,用平板法进行早期收缩裂鏠试验,并取相同配合
比进行抗渗性能试验。研究不同长度、不同体积掺量的剑麻纤维对砂浆早期收缩性能和抗渗性能的影响,并开
展剑麻纤维影响抗渗性能和早期抗裂性能的相关性研究。试验结果表明,0.05%体积掺量、长度6mm的剑麻
纤维抗渗防裂效果均为最佳,裂缝降低系数为98.81%,最大渗水压力提高78.8%。剑麻纤维水泥砂浆抗渗性
能与抗裂性能两种耐久性能其有正相关性,即抗裂性能越高,抗渗性能越好。?为剑麻纤维均匀地分布在水泥
砂浆基体之中,它可以阻得集料的分层和离析,保证水泥基材料早期的泌水性,抑制水泥基材料的千缩从而阻
止沉降裂纹的产生,且能约東基体变形并阻碍基体的错位运动。
关键词:剑麻纤维;试验研究;抗渗性能;抗裂性能;相关性
中图分类号:TU528.58文献标识码:A文章编号:2095-0985(2017)02-00005
Experiments on Cracking Impermeability of Sisal Fiber Mortar
LU Xiao-li, SU Jie, LI Li-ping
(1. College of Engineering, Wuhan University of Engineering Science, Wuhan 430200, China
2. Faculty of Engineering China University of Geoscienees. Wuhan 430074 China
Abstract: Early shrinkage-crack test based on the slab approach were completed to study the
impermeability and the anti-cracking properties of the ordinary cement mortar addin sisal fibers, and
the cement mortar with sisal fibers impermeability test was carried out in the same mixture ratio. The
sisal fiber 's different lengths and volume contents were discussed to figure out the influence of the
mortar 's initial shrinkage and impermeability properties then the correlation study between the sisal
fiber ' s impermeability and anti-cracking properties was conducted. Tests ' results showed that the
impermeability and anti-cracking properties of the cement mortar gained the optimum, when the
fracture reduction coefficient reached at 98.81% and the maximum of the seepage pressure was
increased to 78.8% when sisal fibers was added at 0.05% volume content and 6 mm long. It indicated
that the correlation between impermeability and crack-resistance performances of the cement mortar
with sisal fibers was positive, in other words, the anti-cracking property was increased to higher, the
impermeability was more excellent. the sisal fiber could weaken aggregates 'stratification and
segregation on account of the fiber being got even distribution in the cement-mortar matrix and ensure
cement-based material s bleeding at early stage. Moreover, the sisal fiber restrained shaping
settlement-cracks in related structures through restricting the dry shrinkage of the cement-based
material and constrained the matrix 's deformation and dislocation movement
Key words sisal fiber; experimental research anti permeability; anti cracking performance
relevance
收稿日期:2016-07-06修回日期:2017-01-05
作者简介:卢小丽(1981-),女,湖北广水人,讲师,硕十,研究方向为水泥基复合材料(Email:461452165@gc.com
通讯作者:苏清(1981-),女,湖北黄网人,讲师,硕士,研究方向为混凝土材料及结构力学行为( Email:14979939q,com
基金项异力赞抛校基本科计专项(204201500