Experimental study on ultrasonic wave velocity change of fresh concrete under multiple vibration loadings
YANG Xiaolin
LI Shuanjie
CHU Huaibao
YAO Zhihui
YANG Jie
LIU Bao
Abstract：In order to study the influence of multiple vibrations on performance of new concrete,a new concrete vibration simulation test was designed.The vibration load was applied to the fresh concrete by shaking table.The ultrasonic wave velocity was measured during the test.The test piece was used to analyze changes of ultrasonic and regularity of wave velocity.The experimental results show that ultrasonic wave velocity of the new pouring concrete has experienced three stages:rapid growth,slow growth and basic stability.The vibration test block has experienced four stages:rapid growth,slow growth,rapid decrease and basic stability.The velocity of ultrasonic wave within 48 hours is larger than that of the reference test block and the wave velocity reaches the peak.During the period of 3 ～ 7days,the ultrasonic wave velocity of the vibration test piece begins to decrease with the increase of the number of vibrations.However,the ultrasonic wave velocity of the reference test block increases continuously.After 7 days of age,the ultrasonic wave velocity of the vibration test block is gradually stabilized and the final value is lower than that of the reference test block.
Keywords：vibration loadingnewly-poured concreteultrasonic wave velocity
Publication Date：2018-05-02
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 124-128 )