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Forecasting the rheological state properties of self-compacting concrete mixes using the response surface methodology technique for sustainable structural concreting

Author

Listed:
  • Edwin Zumba
  • Nancy Velasco
  • Edison Marcelo Melendres Medina
  • Jorge Bunay
  • Nestor Augusto Estrada Brito
  • Kennedy C Onyelowe
  • Nakkeeran Ganasen
  • Shadi Hanandeh

Abstract

It is structurally pertinent to understudy the important roles the self-compacting concrete (SCC) yield stress and plastic viscosity play in maintaining the rheological state of the concrete to flow. It is also important to understand that different concrete mixes with varying proportions of fine to coarse aggregate ratio and their nominal sizes produce different and corresponding flow- and fill-abilities, which are functions of the yield stress/plastic viscosity state conditions of the studied concrete. These factors have necessitated the development of regression models, which propose optimal rheological state behavior of SCC to ensure a more sustainable concreting. In this research paper on forecasting the rheological state properties of self-compacting concrete (SCC) mixes by using the response surface methodology (RSM) technique, the influence of nominal sizes of the coarse aggregate has been studied in the concrete mixes, which produced experimental mix entries. A total of eighty-four (84) concrete mixes were collected, sorted and split into training and validation sets to model the plastic viscosity and the yield stress of the SCC. In the field applications, the influence of the sampling sizes on the rheological properties of the concrete cannot be overstretched due to the importance of flow consistency in SCC in order to achieve effective workability. The RSM is a symbolic regression analysis which has proven to exercise the capacity to propose highly performable engineering relationships. At the end of the model exercise, it was found that the RSM proposed a closed-form parametric relationship between the outputs (plastic viscosity and yield stress) and the studied independent variables (the concrete components). This expression can be applied in the design and production of SCC with performance accuracies of above 95% and 90%, respectively. Also, the RSM produced graphical prediction of the plastic viscosity and yield stress at the optimized state conditions with respect to the measured variables, which could be useful in monitoring the performance of the concrete in practice and its overtime assessment. Generally, the production of SCC for field applications are justified by the components in this study and experimental entries beyond which the parametric relations and their accuracies are to be reverified.

Suggested Citation

  • Edwin Zumba & Nancy Velasco & Edison Marcelo Melendres Medina & Jorge Bunay & Nestor Augusto Estrada Brito & Kennedy C Onyelowe & Nakkeeran Ganasen & Shadi Hanandeh, 2024. "Forecasting the rheological state properties of self-compacting concrete mixes using the response surface methodology technique for sustainable structural concreting," PLOS ONE, Public Library of Science, vol. 19(7), pages 1-37, July.
  • Handle: RePEc:plo:pone00:0302202
    DOI: 10.1371/journal.pone.0302202
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    References listed on IDEAS

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    1. Celal Cakiroglu & Gebrail Bekdaş & Sanghun Kim & Zong Woo Geem, 2022. "Explainable Ensemble Learning Models for the Rheological Properties of Self-Compacting Concrete," Sustainability, MDPI, vol. 14(21), pages 1-24, November.
    2. Kennedy C Onyelowe & Denise-Penelope N Kontoni, 2023. "The net-zero and sustainability potential of SCC development, production and flowability in concrete structures," International Journal of Low-Carbon Technologies, Oxford University Press, vol. 18, pages 530-541.
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