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Investigating the Creep Properties of PET-Modified Asphalt Concrete | ||
| Civil Engineering Infrastructures Journal | ||
| مقاله 3، دوره 51، شماره 2، اسفند 2018، صفحه 277-292 اصل مقاله (1.24 M) | ||
| نوع مقاله: Research Papers | ||
| شناسه دیجیتال (DOI): 10.7508/ceij.2018.02.003 | ||
| نویسندگان | ||
| Hasan Taherkhani* 1؛ Mohammad Reza Arshadi2 | ||
| 1assistant professor, civil engineering department, university of zanjan, zanjan, Iran | ||
| 2Civil Engineering Department, University of Zanjan, Zanjan, Iran | ||
| چکیده | ||
| This study has investigated the creep properties of asphaltic concrete modified with different dosages of waste polyethylene terephthalate (PET) in two different ranges of size. Uniaxial dynamic creep test at 40°C was conducted on the cylindrical specimens of the mixtures. The load was applied in two different frequencies of 0.5 and 5Hz. Creep test results showed that the accumulated strain under dynamic loading increased with increasing PET content, with lower values for the mixtures containing finer PET particles. Moreover, it was found that the accumulated strain under the loading with higher frequency was more than that under lower frequency, with higher sensitivity to frequency for the mixtures containing finer PET. The results of dynamic creep tests were used for determination of the constants of a three stage model. The linear creep slope in the second region of the creep curve and the flow number showed that the increase of PET content and size results in decrease of permanent deformation resistance. However, the mixtures modified with 4% of fine and coarse PET particles had the highest loading cycles at the end of primary creep region, where most of the strain was recoverable. | ||
| کلیدواژهها | ||
| Asphalt Concrete؛ Creep Strain Rate؛ Dynamic Creep Test؛ Flow Number؛ PET | ||
| مراجع | ||
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Taherkhani. H. and Arshadi, M.R. (2017). "Investigating the mechanical properties of asphalt concrete containing waste polyethylene terephthalate (PET)", Road Materials and Pavement Design, 1-18. Doi.org/10.1080/14680629.2017.1395354 Zhou, F., Scullion, T. and Sun, L. (2004). "Verification and modeling of three-stage permanent deformation behavior of asphalt mixes", Journal of Transportation Engineering, ASCE,130(4), 486-494. | ||
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