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Gray Correlation Analysis and Prediction on Permanent Deformation of Subgrade Filled with Construction and Demolition Materials

National Engineering Laboratory of Highway Maintenance Technology, Changsha University of Science & Technology, Changsha 410000, China
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Materials 2019, 12(18), 3035; https://doi.org/10.3390/ma12183035
Received: 1 August 2019 / Revised: 15 September 2019 / Accepted: 16 September 2019 / Published: 19 September 2019
(This article belongs to the Section Construction and Building Materials)
Construction and demolition (C&D) materials obtained from the demolition of buildings are proven to be qualified and sustainable subgrade fillers. The permanent deformation response of subgrade C&D materials under different moisture contents, degrees of compaction, deviator stresses, and confining pressures was revealed by carrying out dynamic triaxial texts. Then, using a four-factor and three-level orthogonal test and by calculating the Gray correlation degree of each factor, the influence degree of each factor on the permanent deformation was determined. The results indicated that two different response types of the permanent deformation of subgrade C&D materials, plastic shakedown and plastic creep, were identified as reason behind the increase in stress levels. Also, according to the Gray correlation analysis results, the permanent deformation of highway subgrade filled with C&D materials is influenced by the deviator stress most significantly, followed by moisture content, degree of compaction, and confining pressure. Finally, a permanent deformation prediction model about this kind of subgrade filler with a reasonable prediction accuracy was proposed. View Full-Text
Keywords: subgrade; C&D materials; permanent deformation; gray correlation; prediction model subgrade; C&D materials; permanent deformation; gray correlation; prediction model
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MDPI and ACS Style

Zhang, J.; Zhang, A.; Li, J.; Li, F.; Peng, J. Gray Correlation Analysis and Prediction on Permanent Deformation of Subgrade Filled with Construction and Demolition Materials. Materials 2019, 12, 3035. https://doi.org/10.3390/ma12183035

AMA Style

Zhang J, Zhang A, Li J, Li F, Peng J. Gray Correlation Analysis and Prediction on Permanent Deformation of Subgrade Filled with Construction and Demolition Materials. Materials. 2019; 12(18):3035. https://doi.org/10.3390/ma12183035

Chicago/Turabian Style

Zhang, Junhui, Anshun Zhang, Jue Li, Feng Li, and Junhui Peng. 2019. "Gray Correlation Analysis and Prediction on Permanent Deformation of Subgrade Filled with Construction and Demolition Materials" Materials 12, no. 18: 3035. https://doi.org/10.3390/ma12183035

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