Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP)
Using reclaimed asphalt pavement with additives as part of new road construction has economic and environmental advantages. As an attempt to preserve aggregate resources and save money, and knowing the effects of the selected additive materials, this study was done in Sulaimani City. The samples of...
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| Format: | Article |
| Language: | English |
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Sulaimani Polytechnic University
2019-10-01
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| Series: | Kurdistan Journal of Applied Research |
| Subjects: | |
| Online Access: | https://kjar.spu.edu.iq/index.php/kjar/article/view/303 |
| _version_ | 1797197692891299840 |
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| author | Soz Mohammed Ebrahim Hardy Kamal Karim |
| author_facet | Soz Mohammed Ebrahim Hardy Kamal Karim |
| author_sort | Soz Mohammed Ebrahim |
| collection | DOAJ |
| description | Using reclaimed asphalt pavement with additives as part of new road construction has economic and environmental advantages. As an attempt to preserve aggregate resources and save money, and knowing the effects of the selected additive materials, this study was done in Sulaimani City. The samples of the RAP were selected from the Sulaimani municipality stockpiles. The ignition and centrifuge testing machines were used to separate the aggregate and binder of the RAP. Based on the standard deviation of the obtained asphalt content, the blend was decided to be 40% RAP and 60% new material. The aggregate tests were conducted to evaluate the characteristics of the PAR aggregate. The performance grade test was done for the reclaimed asphalt binder. Three types of additives, which were Styrene Butadiene-Styrene (SBS), Crumb Rubber (CR), and Polypropylene (PP), mixed with the reclaimed asphalt binder with three different percentages of the binder which were 3%, 5%, and 7%. Indirect Tensile Strength (ITS) test was performed to the conditioned and unconditioned mixtures. To evaluate the effects of additives on the moisture sensitivity of the reclaimed mixtures, ITS Ratios were obtained. Most of the percentages of additives decreased the ITS of the conditioned and unconditioned samples. The only percentage of the additive material increased the ITS was 5% of PP in conditioned case. However, additives did not benefit the ITS, they benefited the ITSR greatly. The best obtained ITSR for each additive material was 7% SBS, 3% CR, and 5% PP that had 99.71%, 97.1%, and 90.7%, respectively.
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| first_indexed | 2024-03-07T14:11:02Z |
| format | Article |
| id | doaj.art-b81e5e5ac74f4618a12163da8ec8f733 |
| institution | Directory Open Access Journal |
| issn | 2411-7684 2411-7706 |
| language | English |
| last_indexed | 2024-04-24T06:48:01Z |
| publishDate | 2019-10-01 |
| publisher | Sulaimani Polytechnic University |
| record_format | Article |
| series | Kurdistan Journal of Applied Research |
| spelling | doaj.art-b81e5e5ac74f4618a12163da8ec8f7332024-04-22T17:19:21ZengSulaimani Polytechnic UniversityKurdistan Journal of Applied Research2411-76842411-77062019-10-014210.24017/science.2019.2.8303Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP)Soz Mohammed Ebrahim0Hardy Kamal Karim1Civil Engineering Department, Engineering College, University of Sulaimani, Sulaimani, IraqCivil Engineering Department, Engineering College, University of Sulaimani, Sulaimani, IraqUsing reclaimed asphalt pavement with additives as part of new road construction has economic and environmental advantages. As an attempt to preserve aggregate resources and save money, and knowing the effects of the selected additive materials, this study was done in Sulaimani City. The samples of the RAP were selected from the Sulaimani municipality stockpiles. The ignition and centrifuge testing machines were used to separate the aggregate and binder of the RAP. Based on the standard deviation of the obtained asphalt content, the blend was decided to be 40% RAP and 60% new material. The aggregate tests were conducted to evaluate the characteristics of the PAR aggregate. The performance grade test was done for the reclaimed asphalt binder. Three types of additives, which were Styrene Butadiene-Styrene (SBS), Crumb Rubber (CR), and Polypropylene (PP), mixed with the reclaimed asphalt binder with three different percentages of the binder which were 3%, 5%, and 7%. Indirect Tensile Strength (ITS) test was performed to the conditioned and unconditioned mixtures. To evaluate the effects of additives on the moisture sensitivity of the reclaimed mixtures, ITS Ratios were obtained. Most of the percentages of additives decreased the ITS of the conditioned and unconditioned samples. The only percentage of the additive material increased the ITS was 5% of PP in conditioned case. However, additives did not benefit the ITS, they benefited the ITSR greatly. The best obtained ITSR for each additive material was 7% SBS, 3% CR, and 5% PP that had 99.71%, 97.1%, and 90.7%, respectively. https://kjar.spu.edu.iq/index.php/kjar/article/view/303RAP, Styrene Butadiene–Styrene (SBS), Crumb Rubber (CR), Recycled Atactic Polypropylene (PP), Performance Grade (PG), Indirect Tensile Strength, Moisture Sensitivity. |
| spellingShingle | Soz Mohammed Ebrahim Hardy Kamal Karim Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP) Kurdistan Journal of Applied Research RAP, Styrene Butadiene–Styrene (SBS), Crumb Rubber (CR), Recycled Atactic Polypropylene (PP), Performance Grade (PG), Indirect Tensile Strength, Moisture Sensitivity. |
| title | Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP) |
| title_full | Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP) |
| title_fullStr | Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP) |
| title_full_unstemmed | Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP) |
| title_short | Effects of Additive Materials on Indirect Tensile Strength and Moisture Sensitivity of Recycled Asphalt Pavement (RAP) |
| title_sort | effects of additive materials on indirect tensile strength and moisture sensitivity of recycled asphalt pavement rap |
| topic | RAP, Styrene Butadiene–Styrene (SBS), Crumb Rubber (CR), Recycled Atactic Polypropylene (PP), Performance Grade (PG), Indirect Tensile Strength, Moisture Sensitivity. |
| url | https://kjar.spu.edu.iq/index.php/kjar/article/view/303 |
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