Influence of curing time to compressive properties of cemented sand similar materials

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Journal of Vibration and Shock ›› 2015, Vol. 34 ›› Issue (13) : 200-204.

Yuan Pu1,2, Xu Ying1,2

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Abstract

In order to investigate the reasonable curing time of similar material, reduce the cycle time and accelerate the progress of physical similar model test, static uniaxial compression test was conducted for cemented sand similar material with 4 kinds of proportions in 3 kinds of curing times. Moreover, impact uniaxial compression test was also carried out by split Hopkinson pressure bar apparatus. The research shows that with the hydration reaction of cemented material in similar material proceeding, both static and dynamic uniaxial compressive strength for 4 kinds of cemented sand similar material increases with curing time growing. And the increase rate from 7d to 14d is fast, while the increase rate from 14d to 21d is slow. So the reasonable curing time for cemented sand similar material is 14d. Under the condition of test strain rate, both the dynamic increase factor for compressive strength and dynamic peak strain of cemented sand similar material decrease gradually with curing time growing. The smaller the sand-cement ratio, the more the cemented material in similar material is, then the bigger the static and dynamic uniaxial compressive strength is and the smaller the dynamic increase factor for compressive strength is.

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Yuan Pu1,2, Xu Ying1,2. Influence of curing time to compressive properties of cemented sand similar materials[J]. Journal of Vibration and Shock, 2015, 34(13): 200-204

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