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Irreversible time-dependent rheological behavior of cement slurries : constitutive model and experiments

(2019) JOURNAL OF RHEOLOGY. 63(2). p.247-262
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Abstract
Over the last few decades, much focus has been given to investigating the reversible rheological behavior of thixotropic materials, but the description of the rheology of materials undergoing an irreversible process is still challenging. In this work, the time-dependent rheological behavior of a cement slurry is investigated. Different rheometric experiments are performed to evaluate the structure breakdown under shear, cement gelation, and curing process. A recently proposed thixotropic elasto-viscoplastic model [de Souza Mendes, Soft Matter 7, 2471-2483 (2011)] is modified to account for irreversible effects, which can be either of a chemical or physical nature, making the current model capable of describing reversible and irreversible processes with a single structure parameter. The parameters of the model are estimated from constant shear rate tests and from the flow curve of the fresh cement slurry. The model predictions are compared to step-down and step-up in stress experiments, and the results show that the model successfully describes experimental data obtained. Interesting phenomena are observed and discussed, including (i) thixotropic behavior during the dormant period, (ii) shear banding, (iii) irreversible changes in cement slurry rheology after the hydration reactions accelerate, and (iv) the existence of a characteristic time for the transition from a thixotropic-yield-stress material to a solid during curing. The predictive capability of the new model includes bifurcation, shear banding, stress overshoots, effects of chemical reactions, and irreversible shear degradation. It is argued that the ideas employed in the present work can be used to incorporate irreversible effects into other thixotropic models, giving rise to the possibility of describing the transient rheological behavior of complex materials in an unprecedented fashion. (c) 2019 The Society of Rheology.
Keywords
Mechanical Engineering, General Materials Science, Mechanics of Materials, Condensed Matter Physics, WAXY CRUDE OILS, YIELD-STRESS, THIXOTROPIC BEHAVIOR, PORTLAND-CEMENT, EARLY AGE, MECHANICAL-PROPERTIES, SHEAR MODULUS, WALL SLIP, FLOW, CONCRETE

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Citation

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MLA
Marchesini de Oliveira, Flavio, et al. “Irreversible Time-Dependent Rheological Behavior of Cement Slurries : Constitutive Model and Experiments.” JOURNAL OF RHEOLOGY, vol. 63, no. 2, 2019, pp. 247–62.
APA
Marchesini de Oliveira, F., Oliveira, R. M., Althoff, H., & de Souza Mendes, P. R. (2019). Irreversible time-dependent rheological behavior of cement slurries : constitutive model and experiments. JOURNAL OF RHEOLOGY, 63(2), 247–262.
Chicago author-date
Marchesini de Oliveira, Flavio, Rafael M. Oliveira, Heloisa Althoff, and Paulo R. de Souza Mendes. 2019. “Irreversible Time-Dependent Rheological Behavior of Cement Slurries : Constitutive Model and Experiments.” JOURNAL OF RHEOLOGY 63 (2): 247–62.
Chicago author-date (all authors)
Marchesini de Oliveira, Flavio, Rafael M. Oliveira, Heloisa Althoff, and Paulo R. de Souza Mendes. 2019. “Irreversible Time-Dependent Rheological Behavior of Cement Slurries : Constitutive Model and Experiments.” JOURNAL OF RHEOLOGY 63 (2): 247–262.
Vancouver
1.
Marchesini de Oliveira F, Oliveira RM, Althoff H, de Souza Mendes PR. Irreversible time-dependent rheological behavior of cement slurries : constitutive model and experiments. JOURNAL OF RHEOLOGY. 2019;63(2):247–62.
IEEE
[1]
F. Marchesini de Oliveira, R. M. Oliveira, H. Althoff, and P. R. de Souza Mendes, “Irreversible time-dependent rheological behavior of cement slurries : constitutive model and experiments,” JOURNAL OF RHEOLOGY, vol. 63, no. 2, pp. 247–262, 2019.
@article{8598050,
  abstract     = {Over the last few decades, much focus has been given to investigating the reversible rheological behavior of thixotropic materials, but the description of the rheology of materials undergoing an irreversible process is still challenging. In this work, the time-dependent rheological behavior of a cement slurry is investigated. Different rheometric experiments are performed to evaluate the structure breakdown under shear, cement gelation, and curing process. A recently proposed thixotropic elasto-viscoplastic model [de Souza Mendes, Soft Matter 7, 2471-2483 (2011)] is modified to account for irreversible effects, which can be either of a chemical or physical nature, making the current model capable of describing reversible and irreversible processes with a single structure parameter. The parameters of the model are estimated from constant shear rate tests and from the flow curve of the fresh cement slurry. The model predictions are compared to step-down and step-up in stress experiments, and the results show that the model successfully describes experimental data obtained. Interesting phenomena are observed and discussed, including (i) thixotropic behavior during the dormant period, (ii) shear banding, (iii) irreversible changes in cement slurry rheology after the hydration reactions accelerate, and (iv) the existence of a characteristic time for the transition from a thixotropic-yield-stress material to a solid during curing. The predictive capability of the new model includes bifurcation, shear banding, stress overshoots, effects of chemical reactions, and irreversible shear degradation. It is argued that the ideas employed in the present work can be used to incorporate irreversible effects into other thixotropic models, giving rise to the possibility of describing the transient rheological behavior of complex materials in an unprecedented fashion. (c) 2019 The Society of Rheology.},
  author       = {Marchesini de Oliveira, Flavio and Oliveira, Rafael M. and Althoff, Heloisa and de Souza Mendes, Paulo R.},
  issn         = {0148-6055},
  journal      = {JOURNAL OF RHEOLOGY},
  keywords     = {Mechanical Engineering,General Materials Science,Mechanics of Materials,Condensed Matter Physics,WAXY CRUDE OILS,YIELD-STRESS,THIXOTROPIC BEHAVIOR,PORTLAND-CEMENT,EARLY AGE,MECHANICAL-PROPERTIES,SHEAR MODULUS,WALL SLIP,FLOW,CONCRETE},
  language     = {eng},
  number       = {2},
  pages        = {247--262},
  title        = {Irreversible time-dependent rheological behavior of cement slurries : constitutive model and experiments},
  url          = {http://dx.doi.org/10.1122/1.5054879},
  volume       = {63},
  year         = {2019},
}

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