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Computers and Concrete Volume 17, Number 5, May 2016 , pages 613-628 DOI: https://doi.org/10.12989/cac.2016.17.5.613 |
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Evaluation of the effect of aggregate on concrete permeability using grey correlation analysis and ANN |
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Lijuan Kong, Xiaoyu Chen and Yuanbo Du
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| Abstract | ||
| In this study, the influence of coarse aggregate size and type on chloride penetration of concrete was investigated, and the grey correlation analysis was applied to find the key influencing factor. Furthermore, the proposed 6-10-1 artificial neural network (ANN) model was constructed, and performed under the MATLAB program. Training, testing and validation of the model stages were performed using 81 experiment data sets. The results show that the aggregate type has less effect on the concrete permeability, compared with the size effect. For concrete with a lower w/b, the coarse aggregate with a larger particle size should be chose, however, for concrete with a higher w/c, the aggregate with a grading of 5-20 mm is preferred, too large or too small aggregates are adverse to concrete chloride diffusivity. A new idea for the optimum selection of aggregate to prepare concrete with a low penetration is provided. Moreover, the ANN model predicted values are compared with actual test results, and the average relative error of prediction is found to be 5.62%. ANN procedure provides guidelines to select appropriate coarse aggregate for required chloride penetration of concrete and will reduce number of trial and error, save cost and time. | ||
| Key Words | ||
| coarse aggregate; permeability; concrete; grey correlation analysis; artificial neural network | ||
| Address | ||
| Lijuan Kong, Xiaoyu Chen and Yuanbo Du: School of Materials Science and Engineering, Shijiazhuang Tiedao University, 17 Northeast, Second Inner Ring, Shijiazhuang, P. R. China | ||