Influence of the weighing bar position in vessel on measurement of cement's particle size distribution by using the buoyancy weighing-bar method

TALENTA - Conference on Engineering, Science and Technology 2017

工业技术;自然科学

Tambun, R.^1 ; Sihombing, R.O.^1 ; Simanjuntak, A.^1 ; Hanum, F.^1

Department of Chemical Engineering, Universitas Sumatera Utara, Padang Bulan, Medan, 20155, Indonesia^1

关键词: Analytical balance;    Balance methods;    Cost-effective methods;    Density change;    Floating particles;    Particle migration;    Settling particles;    Time course;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/309/1/012079/pdf
DOI  :  10.1088/1757-899X/309/1/012079

来源: IOP

【 摘 要 】

The buoyancy weighing-bar method is a new simple and cost-effective method to determine the particle size distribution both settling and floating particle. In this method, the density change in a suspension due to particle migration is measured by weighing buoyancy against a weighing-bar hung in the suspension, and then the particle size distribution is calculated using the length of the bar and the time-course change in the mass of the bar. The apparatus of this method consists of a weighing-bar and an analytical balance with a hook for under-floor weighing. The weighing bar is used to detect the density change in suspension. In this study we investigate the influences of position of weighing bar in vessel on settling particle size distribution measurements of cement by using the buoyancy weighing-bar method. The vessel used in this experiment is graduated cylinder with the diameter of 65 mm and the position of weighing bar is in center and off center of vessel. The diameter of weighing bar in this experiment is 10 mm, and the kerosene is used as a dispersion liquids. The results obtained show that the positions of weighing bar in vessel have no significant effect on determination the cement's particle size distribution by using buoyancy weighing-bar method, and the results obtained are comparable to those measured by using settling balance method.