Effect of Re-Vibration on the Quality of Concrete Surface
In construction practice, after initial placement of concrete, re-vibration is done at intervals not clearly defined.The intervals differ at every site by experience and feeling, due to lack of clear-cut method and knowledge.Information on the re-vibration, especially, appropriate timing and intervals between re-vibrations are not clear.Experimental examination was carried out to study the effect of re-vibration timing on the quality of concrete surface.It was found that concrete durability increased with longer time interval between first vibration and re-vibration.And, as for the timing of re-vibration is concerned, re-vibration time was effective in increasing the concrete quality for an experimentally determined penetration depth value of N=100mm (N: fresh concrete deformability index value), which corresponds to the longest time interval for re-vibration.
Re-vibration Durability Early strength of concrete Blast furnace slag Fly ash
Y.Sato H.Hazehara D.N.Katpady M.Yamada M.Soeda
Fukuoka University, Fukuoka City, Japan Research and Development Division, Infratec Co., Ltd., Kagoshima, Japan
国际会议
福州
英文
401-407
2018-11-04（万方平台首次上网日期，不代表论文的发表时间）