Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization
In the present study, ethylene-vinyl acetate (EVA) and crumb rubber (CR) were used as bitumen modifiers. The experiment was designed by response surface methodology (RSM) at different levels of modifier additives based on the central composite design (CCD). Next, the Superpave protocol was followed...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/9825541 |
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| author | Mohamad H. Dehnad Behrouz Damyar Hossein Z. Farahani |
| author_facet | Mohamad H. Dehnad Behrouz Damyar Hossein Z. Farahani |
| author_sort | Mohamad H. Dehnad |
| collection | DOAJ |
| description | In the present study, ethylene-vinyl acetate (EVA) and crumb rubber (CR) were used as bitumen modifiers. The experiment was designed by response surface methodology (RSM) at different levels of modifier additives based on the central composite design (CCD). Next, the Superpave protocol was followed to evaluate the modified bitumen performance at different temperatures compared with the unmodified bitumen. In this regard, to evaluate at high temperatures, a dynamic shear rheometer (DSR) test was performed, and G∗/sinδ index was examined on bitumen samples after aging. Besides, the bending beam rheometer (BBR) test was performed to evaluate the low-temperature behaviour of the modified bitumen according to the SHRP standard based on the creep stiffness and creep rate. The optimal combination of additives was evaluated using RSM and analysis of statistical values to improve the performance properties of bitumen at high and low temperatures. Moreover, based on the DSR and BBR test results, 5.6% of EVA and 3.9% of CR were selected as the optimal values for the modified bitumen behaviour at the high and low temperatures of the mixture. |
| format | Article |
| id | doaj-art-b57082298741404baceee4cc1dea824e |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-b57082298741404baceee4cc1dea824e2025-02-03T07:23:57ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422021-01-01202110.1155/2021/98255419825541Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM OptimizationMohamad H. Dehnad0Behrouz Damyar1Hossein Z. Farahani2Department of Civil Engineering, University of Qom, Qom 3716146611, IranRoad Maintenance and Transport Organization, Tehran 1416753941, IranDepartment of Civil Engineering, University of Tafresh, Tafresh 3951879611, IranIn the present study, ethylene-vinyl acetate (EVA) and crumb rubber (CR) were used as bitumen modifiers. The experiment was designed by response surface methodology (RSM) at different levels of modifier additives based on the central composite design (CCD). Next, the Superpave protocol was followed to evaluate the modified bitumen performance at different temperatures compared with the unmodified bitumen. In this regard, to evaluate at high temperatures, a dynamic shear rheometer (DSR) test was performed, and G∗/sinδ index was examined on bitumen samples after aging. Besides, the bending beam rheometer (BBR) test was performed to evaluate the low-temperature behaviour of the modified bitumen according to the SHRP standard based on the creep stiffness and creep rate. The optimal combination of additives was evaluated using RSM and analysis of statistical values to improve the performance properties of bitumen at high and low temperatures. Moreover, based on the DSR and BBR test results, 5.6% of EVA and 3.9% of CR were selected as the optimal values for the modified bitumen behaviour at the high and low temperatures of the mixture.http://dx.doi.org/10.1155/2021/9825541 |
| spellingShingle | Mohamad H. Dehnad Behrouz Damyar Hossein Z. Farahani Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization Advances in Materials Science and Engineering |
| title | Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization |
| title_full | Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization |
| title_fullStr | Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization |
| title_full_unstemmed | Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization |
| title_short | Rheological Evaluation of Modified Bitumen by EVA and Crumb Rubber Using RSM Optimization |
| title_sort | rheological evaluation of modified bitumen by eva and crumb rubber using rsm optimization |
| url | http://dx.doi.org/10.1155/2021/9825541 |
| work_keys_str_mv | AT mohamadhdehnad rheologicalevaluationofmodifiedbitumenbyevaandcrumbrubberusingrsmoptimization AT behrouzdamyar rheologicalevaluationofmodifiedbitumenbyevaandcrumbrubberusingrsmoptimization AT hosseinzfarahani rheologicalevaluationofmodifiedbitumenbyevaandcrumbrubberusingrsmoptimization |