河南理工大学学报（自然科学版）2018，Vol.37Issue(3)：124-128,5.DOI:10.16186/j.cnki.1673-9787.2018.03.018
多次振动荷载作用下新浇混凝土超声波波速变化规律试验研究
Experimental study on ultrasonic wave velocity change of fresh concrete under multiple vibration loadings
摘要
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.关键词
振动载荷/新浇混凝土/超声波波速Key words
vibration loading/newly-poured concrete/ultrasonic wave velocity分类
矿业与冶金引用本文复制引用
杨小林,李拴杰,褚怀保,姚智慧,杨杰,刘宝..多次振动荷载作用下新浇混凝土超声波波速变化规律试验研究[J].河南理工大学学报（自然科学版）,2018,37(3):124-128,5.基金项目
国家自然科学基金资助项目(11542019,50874039) （11542019,50874039）
河南省基础与前沿技术研究项目(162300410032) （162300410032）
