Abstract
As one of moulding methods of cement mortar plates, there is vibrated moulding. In this case, we have two methods, without load or with load and I comfirmed, in 2nd report the latter method(with load) was superier to the former method (without load), but small load was all right. In vibrating moulding with load, next four conditions are very important-frequency, amplitude, vibrating time and load. When the vibrating is regarded as a simple harmonic motion, the frequency and amplitude are represented by acceleration and above four conditions become three conditions-acceleration, vibrating time and load. In this report, I researched the effect of above three conditions on the bending strength of mortar plates by experiments. In conclusion of this experiment, I obtained a experimental formular as follows. [numerical formula] where f: bending strength of plate α: acceleration of vibration T: vibrating time W:load k,n: Constant numbers In addition, I obtained the relations between the bending youngs modulus, unit volume weight, void ratio and the bending strength of plates.
