摘要
本文通过室内试验研究混凝土的水灰比、MgO掺量、粉煤灰掺量、骨料级配等对外掺MgO混凝土自生体积变形的影响。结果表明,随着混凝土水灰比和MgO外掺量的增大,混凝土的自生体积变形增大;粉煤灰的掺入使MgO混凝土早期的自生体积变形增大而后期的自生体积变形减小;骨料级配对MgO混凝土的自生体积变形有显著的影响。论文的研究成果对MgO混凝土变形性能的进一步研究和MgO混凝土的推广应用具有现实意义。
In this work,the influence of water-cement ratio,MgO content,fly-ash content,grading of aggregate and so on,on autogenic volume deformation of concrete mixed with light-burned magnesium oxide were tested.Results show that the autogenic volume deformation becomes greater when water-cement ratio or/and MgO content is increased.And this volume deformation is higher at early ages and lower at later ages if fly-ash is added,and it also varies considerably with the maximum aggregate size.The results are practically significant to further study and application of concrete mixed with magnesium oxide.
出处
《水力发电学报》
EI
CSCD
北大核心
2013年第2期252-256,共5页
Journal of Hydroelectric Engineering
基金
国家自然科学基金(50969002)
关键词
水工材料
自生体积变形
变形试验
氧化镁混凝土
配合比参数
hydraulic material
autogenic volume change of concrete
deformation experiment
concrete mixed with light-burned magnesium oxide
mix factor of concrete
