2007 Fiscal Year Final Research Report Summary
Rational flow constitutive equation and development of flow analytical method of fresh concrete
| Project/Area Number |
18560554
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | University of the Ryukyus |
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Principal Investigator |
YAMADA Yoshitomo University of the Ryukyus, Faculty of Eng., Professor (80220416)
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| Co-Investigator(Kenkyū-buntansha) |
TOMIYAMA Jun University of the Ryukyus, Faculty of Eng., Associate Professor (20325830)
IRAHA Shigeo University of the Ryukyus, Faculty of Eng., Professor (30045025)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Structure and Material / Rheology / Flow Constitution Equation / Simulation / Fresh Concrete |
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| Research Abstract |
The purpose of this research is the establishment of rational flow constitutive equation and development of flow analytical method of fresh concrete.
I proposed the flow curve predictive equation that considered the strain rate depend on the flocculation structure destruction process of cement particles. This proposal equation improved a Roscoe's equation.
I found the coefficient of the equation from the rotational viscometer experiment results.
This proposal equation refers to the cement paste. However, this equation can apply to mortar and concrete.
For flow simulation of the fresh concrete, I developed new analytical methods, MPS(Moving Particle Semi-implicit) method and marker particle visco-plastic F. E. M. These analytical methods support materials nonlinearity caused by Bingham model. These analytical methods showed an analysis result equal to experiment results of the past.
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