Shear Vibration Equivalent Method for Determining Vibration Frequency of Concrete Prefabrication Production

In order to solve the problem of determining the process parameters caused by the rheological property of concrete in the industrialized vibration compaction production, the shear vibration equivalent method for determining the vibration frequency of concrete prefabrication production is proposed. According to the equivalent effect of shear and vibration, the particle flow interaction theory is used to calculate the rheological parameters of cement paste in the flow field of rotary viscometer under vibration. The mapping relationship between vibration frequency and shear rate can be established when the amplitude is fixed. The apparent viscosity can be used as the evaluation index of the fluidity of concrete mixture in rheology. By studying the critical point of the influence of shear rate on the decrease of apparent viscosity of concrete mixture, the optimal shear rate which can make the apparent viscosity decrease to the limit value is obtained. Combining with the optimal shear rate and the mapping relationship between vibration frequency and shear rate, the optimal vibration frequency of concrete precast production can be determined. This method can be applied to the quantitative determination of vibration frequency in the vibration compaction production of precast concrete components, which is conducive to the improvement of product performance and control of energy consumption cost.