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The Strength of Fresh Concrete after Simulated Earthquake at Magnitude of 9

This study concentrates on investigating the 28d strength of fresh concrete after the occurrence of a simulated earthquake at magnitude of 9. The experiment has been carried out through the simulated earthquake that was generated by a high-performance vibrating platform with a size of 6m×6m, provided by the Nuclear Power Institute of China. There were 14 kinds the fresh concrete (C30 and C50) with seven ages (6 hours, 12 hours, 24 hours, 48 hours, 72 hours, 168 hours, 336 hours) acted by a types of ground acceleration (0.50g). The modified El centro was used to take the recordings of the time series of parameters. The results show that the strength of the fresh concrete undergoing the simulated earthquake can be well recovered after 28 days. It is nearly the same to the concrete which not vibrated by the earthquake in the same curing condition. Also the effect mechanism of the earthquake upon the fresh concrete had been analyzed.