Influence of superplasticizer on the non-Newtonian characteristics of cement paste
| Autor: | C. Jayasree, J. Murali Krishnan, Ravindra Gettu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2011 |
| Předmět: |
Materials science
Superplasticizer Building and Construction Viscous liquid Viscoelasticity Non-Newtonian fluid Physics::Fluid Dynamics Cement paste Creep and recovery Experimental investigations Marsh cone Model parameters Non-linear Non-newtonian Non-Newtonian behaviors Steady shear Superplasticized cements Superplasticizers Viscous fluids Creep Elasticity Experiments Non Newtonian flow Residual stresses Shear flow Stress relaxation Viscosity Wetlands Cements Rheology Mechanics of Materials General Materials Science Direct shear test Composite material Civil and Structural Engineering |
| Zdroj: | IndraStra Global. |
| ISSN: | 2381-3652 |
| Popis: | The superplasticized cement paste usually exhibits non-Newtonian characteristics, which depend on the type of superplasticizer and its dosage. Current attempts in the cement paste rheology literature have mainly focused on reducing the data from steady shear experiments to simple constitutive models, and exploring the influence of superplasticizer dosage and type based on these model parameters. In this study, the non-Newtonian behavior of the cement paste is characterized based on more fundamental experimental investigations without recourse to any specific model. Steady shear, creep and recovery, and stress relaxation experiments were conducted on a variety of superplasticizer and cement paste combinations, and the transition from non-linear viscoelastic to non-Newtonian and subsequently to linearly viscous fluid, as the dosage is increased were observed. Additionally, Marsh cone experiments were conducted to determine the optimum dosages and it was found that dosages determined based on Marsh cone were close to the dosages at the transition to the linearly viscous behaviour. � RILEM 2010. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|