【摘要】 新浇筑混凝土在初凝时如果受外界扰动,混凝土内部结构会受损,强度会降低,但在混凝土终凝后,外界扰动混凝土内部结构受损不大,强度不会受影响。利用超声波脉冲法比较基准混凝土与受扰动混凝土之间的超声声速,来判断混凝土试件的受扰动情况。更多还原

【Abstract】 New pouring concrete in the initial setting time by external disturbances,if the concrete internal structure will be damaged,the intensity will decrease,but the final setting of concrete,the external disturbance is not damaged the internal structure of concrete,strength will not be affected.In this paper,ultrasonic pulse method and by the concrete base of comparison between the speed of sound disturbance of concrete to determine concrete specimens by the perturbation.更多还原