摘要
本文主要从四个方面研究了磁化水对混凝土耐久性的影响:孔结构、抗冻融性能、干缩和抗氯离子渗透性能。磁化水由自来水通过自主研制的MW-Ⅰ型磁水器而获得。试验中采用的磁化参数为磁场强度810mT,流速0.73m/s,磁场长度580mm。结果显示,磁化处理使混凝土总孔隙率下降20.8%,各龄期的孔级配改善。导致磁化水混凝土的干燥收缩有较大改善,90天相对收缩下降6%。冻融循环和抗氯离子渗透性能有较大的提高。
This research investigates the effect of magnetic water on concrete durability in four aspects： concrete micro-pore structure, frost resistance, dry shrinkage and the ability to resist chloride ion penetration. Magnetic water was obtained by passing tap water through a concrete magnetic-field-generating machine which was designed by us. The parameters in this research included magnetic field strength （810mT）, current velocity （0.73rn/s）, and the length of magnetic field （580mm）.Results show that the total porosity of concrete could decrease 20.8% after mixed with magnetic water, magnetic treatment has a positive influence on the pore size distribution of concrete. It can make dry shrinkage of concrete decrease 6% relatively. Frost resistance and the ability to resist chloride ion penetration of concrete would be greatly improved by use of magnetic water.
出处
《混凝土》
CAS
CSCD
北大核心
2006年第7期1-4,共4页
Concrete
关键词
磁化水混凝土
孔结构
冻融循环
干缩
氯离子渗透
Magnetic water concrete
Micro-pore structure
Freezing-thawing resistance
Drying shrinkage
Chloride ion penetration
