Surface porosity characteristics of self-compacting barite concrete after assisted vibration

Abstract

Self-compacting barite concrete has good radiation resistance and flow performance. Can adapt to most nuclear power projects; Many projects expect concrete to have good radiation resistance and a clean water effect. However, the research on the effect of auxiliary vibration on the surface porosity of self-compacting barite concrete has not been carried out. To effectively explore the influence of auxiliary vibration on the porosity on the surface of self-compacting barite concrete, 300mm*250mm*100mm self-compacting barite concrete test blocks under different vibration states were prepared by changing the vibration time and frequency. After curing, digital cameras were used to take photos of the surface of concrete test blocks to obtain the surface image of concrete. In addition, Image analysis software Image-Pro Plus was used to analyze and process the surface porosity of concrete, to obtain the surface porosity variation characteristics of concrete under different vibration modes. Analysis results show that the self-compacting concrete barite surface parameters such as the number of maximum pore size, surface area, and porosity increase with auxiliary vibrating time and frequency of the change of the first, increase with the decrease of the average pore diameter of concrete surface porosity along with the change of auxiliary vibrating time and frequency has been reduced, when the auxiliary vibration voltage of 70 v, when time is 8 s concrete surface blowhole best.