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Volume 6, Number 3, July 2021 , pages 225-239 DOI: https://doi.org/10.12989/acd.2021.6.3.225 |
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Computing the fracture energy of fiber reinforced cementitious composites using response surface methodology |
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Moosa Mazloom and Sajjad Mirzamohammadi
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| Abstract | ||
| In this study, some models are developed to predict the fracture energy (GF), flexural strength (ft), splitting tensile strength (fspt), and compressive strength (fc) of fiber reinforced cementitious composites (FRCC) based on I-optimal design of response surface methodology (RSM-I-optimal). Indeed, the main aim of this paper is to predict the mentioned parameters of FRCC at different temperatures and the aspect ratios of fibers. For this purpose, the fracture energy and strength properties of FRCC reinforced with aramid, glass, basalt, and polypropylene (PP) fibers were obtained at 20°C, 100°C and 300°C temperatures and were used as experimental values by RSM. The analyses of variance (ANOVA), perturbation, three-dimensional, contour and normal of residual plots were studied to assess the impacts of independent parameters on the relationships. Furthermore, the predictive efficiency of the RSM models between observed and predicted values were examined based on the Nash & Sutcliffe coefficient of efficiency (NSE). In terms of NSE values, the models were exact enough for predicting the flexural, splitting tensile and compressive strengths as well as fracture energy. | ||
| Key Words | ||
| fiber-reinforced cementitious composites; response surface methodology; I-optimal design; strength properties; fracture energy | ||
| Address | ||
| Moosa Mazloom:Department of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran Sajjad Mirzamohammadi:Department of Civil Engineering, Shahid Rajaee Teacher Training University, Tehran, Iran | ||
