EXPERIMENTAL STUDY ON FINE GRAIN SAND EFFECT ON MORTAR FLOW IN HIGH-PERFORMANCE CONCRETE
Important factors of high performance concrete include fluidity and resistance to segregation. These factors are influenced by ambient temperature and fine aggregate. The effect of fine aggregate is especially significant, including its grain size and diameter. It has been suggested that the fine grain sand less than 150 micron has a significant effect on the mortar flow, but few studies have been conducted on the effect of fine grain sand size less than 150 micro meters on the mortar flow.In this study, the effect of fine grain sand less than 150 microns on the mortar flow is investigated. Flow tests are conducted on fine grain sands with sizes ranging from 38 to 150 microns to study the fluidity and resistance to segregation by the relationship between the deformation modulus and the water confinement ratio. It was indicated that the fluidity decreased and resistance to segregation increased using a grain size of 45 microns. It was also shown that the segregation behavior of mortar during flow testing varied depending on the grain size. In conclusion, a possibility for controlling mortar flow by using various fine grain sizes was suggested.
high performance concrete fine grain sand fluidity resistance to segregation
Akira Miyazawa Mitsuo Ozawa Hiroaki Morimoto
Showa Concrete Industry,Japan Gifu University,Japan Gifu University, Japan
国际会议
长沙
英文
262-269
2009-06-05（万方平台首次上网日期，不代表论文的发表时间）