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- W2349432844 abstract "Four kinds of air-entraining agent which are frequently used for hydraulic projects are adopted in the experiments. Concrete made with w/(c+f) ratios of 0.40,0.45 and 0.55 are subjected to high-frequency vibrations. The test results indicate that the high-frequency vibration has a great effect on concrete air content. At the same w/(c+f) ratio,the more vibration time,the more air content loss ratio; and at the same vibration time,concrete with a higher w/(c+f) ratio has a higher air content loss ratio. At a w/(c+f) ratio of 0.40,antifreeze of concrete made with high-quality air-entraining agent is not sensitive to high-frequency vibration; at a w/(c+f) ratio of 0.45,antifreeze of concrete is obviously decreased in vibration time of 60s and 90s; when w/(c+f) ratio is further increased to 0.55,antifreeze of concrete is quickly dropped with increase of vibration time. At the same time,high-frequency vibration also has obvious adverse effect on concrete air bubble parameters. From above test results,appropriate high-frequency vibration time is proposed." @default.
- W2349432844 created "2016-06-24" @default.
- W2349432844 creator A5034714282 @default.
- W2349432844 date "2009-01-01" @default.
- W2349432844 modified "2023-09-24" @default.
- W2349432844 title "Influence of high-frequency vibraiton on concrete air content,antifreeze and air bubble parameters" @default.
- W2349432844 hasPublicationYear "2009" @default.
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