Mixing of Dam Concrete in Continuous Energy Saving Gravity Mixer
Keywords:
2n mixing theory, M-Y Mixer, Inter-particles collisions, Splitting and recombination, ESG mixer, Dam concreteAbstract
The 2n mixing theory, based on kneading and lapping mechanism, was developed with the concept of Japanese noodle (UDON) making method. This theory was verified, with the development of the M-Y mixer, for mixing light and viscous materials using on the horizontal way. The mixing mechanism was modified to inter-particle collisions and impact with the actions of splitting and recombination in order to mix large particle materials, like different types of concrete with the use of the M-Y mixer on the vertical way. In order to represent the mixing performance of this mixer only under gravity, it was renamed as Energy Saving Gravity (ESG) mixer. This paper describes the continuous mixing performance of Dam concrete in ESG mixer. It was verified, with large scale mixing experimental work in real construction site, that the ESG mixer gives the required properties of Dam concrete for construction.
References
2. Okamura H, Maekawa K, Ozawa K. “High Performance Concrete”, Published by Gihodo, Tokyo, Japan, (In
Japanese) 1993.
3. Tamimi AK. “The Effect of Two Stage Mixing Technique on the Properties and the Microstructure of the Concrete Structure”, Ph.D. Thesis, Paisley College, 1989.
4. Ozawa K, Maekawa K, Okamura H. “Development of High Performance Concrete”, Journal of the Faculty of Engineering, The University of Tokyo, XLI: 3.
5. Makoto K et. al. “Concept of Super Quality Concrete and its Property and Structural Performance: Development & Diffusion Association of Super Quality Concrete Structures”, International Workshop on Self Compacting Concrete, 23-26 August, 1998, Kochi University of Technology, Tosa-Yamada, Kochi, Japan, Japan, 1998.
6. Maeda K, Kishitani K. “Study on Mixing Performance Test for New-type Mixer”, The Third Beijing International Symposium on Cement and Concrete, Peking, China, 1993.
7. Maeda K. “Development of a New Type Mixer”, Edited by Maeda Corporation, Tokyo, Japan, 1995.
8. Gyawali TR, Maeda MK, Yamada K, et al. “An Investigation on Properties of EPS Concrete Mixed Using New-Type Mixer”, Maeda Research Institute Technical Report, Maeda Corporation, Japan, 1996; 9-16.
9. Gyawali TR, “Development of Less Energy Required and Gravity Effect Continuous Mixer Based on New Mixing Theory”, Ph.D. Thesis, University of Tokyo, 1999.
10. Gyawali TR, Yamada K, Matabee KM. “High Productivity Continuous Mixing System”, 17th International Symposium on Automation and Robotics in Construction, Taiwan, September 2000.
11. Uchida A, Yamada K, Matabee KM et al. “Development of New Concrete Mixing System Using the New Type of Continuous Mixer “M-Y MIXER”, 97 International Three Gorges Project Technical Seminar, Yicjang China, 1997; 1-10.
12. Gyawali TR, Matabee KM. “Practical Aspects of New Japanese Mixing Technology in Nepal”, 9th National Convention of Engineers, Nepal 2005.
13. Gyawali TR. “Development of “Pre-mix Method” for Mixing Fiber Reinforced Concrete (FRC) in New Energy Saving Continuous Mixer”, Journal of Science and Technology, Khwopa Engineering College, 2014.
14. Gyawali TR, Joshi BR, Matabee KM. “Mixing Performance of Energy Saving Gravity (ESG) Mixer for Powder Materials, ACI Materials Journal (Accepted for publish).
