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Systematic Multiscale Models to Predict the Compressive Strength of Cement Paste as a Function of Microsilica and Nanosilica Contents, Water/Cement Ratio, and Curing Ages

Author

Listed:
  • Chiya Y. Rahimzadeh

    (Civil Engineering Department, Faculty of Engineering, Soran University, Soran 44008, Iraq
    Scientific Research Centre, Soran University, Soran 44008, Iraq)

  • Ahmed Salih

    (Civil Engineering Department, College of Engineering, University of Sulaimani, Sulaymaniyah 46001, Iraq)

  • Azeez A. Barzinjy

    (Department of Physics, College of Education, Salahaddin University-Erbil, Erbil 44001, Iraq
    Department of Physics Education, Faculty of Education, Tishk International University, Erbil 44001, Iraq)

Abstract

Sustainable construction requires high-strength cement materials that additives with silica content could provide the requirements as well. In this study, the effect of the micro and nano-size of silica on the compressive strength of cement paste using different mathematical approaches is investigated. This study compares the strength of preferentially replaced cement pastes with microsilica (MS) and nanosilica (NS) incorporation by proposing several mathematical models. In this study, 205 data were extracted from the literature and analyzed. The modeling processes considered the most significant variables as input variables that influence the compression strength, such as curing time, which ranged between 3 and 90 days, the water-cement ratio, which varied between 0.4 and 0.85, and NS ranged between 0 and 15%. MS ranged between 0 and 40% based on the weight of cement. In this process, the compressive strength of cement paste modified with NS and MS was modeled using four different models, including the Linear Regression Model (LR), Nonlinear Model (NLR), Multi-Logistic Regression Model (MLR), and artificial neural network (ANN). The efficiency of the suggested models was evaluated using different statistical assessments, such as the Root Mean Squared Error (RMES), the Mean Absolute Error (MAE), Scatter Index (SI), Objective value (OBJ), and coefficient of determination (R 2 ). The findings revealed that the ANN model conducted better performance for predicting compressive strength for cement paste than the other models based on the statistical assessment. In addition, based on the statistical assessment of the sensitivity of parameters, NS had more of an effect on the compressive strength of cement paste, with 6.3% more than MS.

Suggested Citation

  • Chiya Y. Rahimzadeh & Ahmed Salih & Azeez A. Barzinjy, 2022. "Systematic Multiscale Models to Predict the Compressive Strength of Cement Paste as a Function of Microsilica and Nanosilica Contents, Water/Cement Ratio, and Curing Ages," Sustainability, MDPI, vol. 14(3), pages 1-23, February.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:3:p:1723-:d:740766
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    References listed on IDEAS

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    1. Hemn Unis Ahmed & Azad A. Mohammed & Serwan Rafiq & Ahmed S. Mohammed & Amir Mosavi & Nadhim Hamah Sor & Shaker M. A. Qaidi, 2021. "Compressive Strength of Sustainable Geopolymer Concrete Composites: A State-of-the-Art Review," Sustainability, MDPI, vol. 13(24), pages 1-38, December.
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