Mix design, development, production and policies of recycled hot mix asphalt: A review
Worldwide, flexible pavements are the paramount type of pavements. These national assets can be recycled to serve the next design life without the need to dispose of them in landfill. The old/distressed, flexible pavement material is called, reclaimed asphalt pavement (RAP) material. In view of the...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2022-10-01
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| Series: | Journal of Traffic and Transportation Engineering (English ed. Online) |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095756422000836 |
| _version_ | 1797984791463723008 |
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| author | Ankit Sharma Gondaimei Ransinchung Rongmei Naga Praveen Kumar Priti Rai |
| author_facet | Ankit Sharma Gondaimei Ransinchung Rongmei Naga Praveen Kumar Priti Rai |
| author_sort | Ankit Sharma |
| collection | DOAJ |
| description | Worldwide, flexible pavements are the paramount type of pavements. These national assets can be recycled to serve the next design life without the need to dispose of them in landfill. The old/distressed, flexible pavement material is called, reclaimed asphalt pavement (RAP) material. In view of the sustainable development practice, 100% RAP should be recycled. However, the practical range of RAP incorporation in a drum mix plant ranges from 10% to 50% whereas in a batch mix plant, it is 10%–35%. In a batch mix plant, incorporation of the hot dried RAP (instead of cold RAP feeding) can increase the RAP incorporation level by 20%. Studies recommended that the rejuvenator should be added over the RAP material instead adding with the base binder. The addition of rejuvenator on the RAP conveyor belt (to the pug mill), provided sufficient time for rejuvenating the aged binder coating over RAP aggregates. Further, a thorough knowledge of the mix design process of recycled hot mix asphalt (RAP-HMA) is essential to produce a durable mix. For high RAP content (>20%), the RAP binder properties are important for the mix design process. However, very limited studies discussed (in detail) the recovery process of the RAP binder. The review article through light on the binder recovery process, method of RAP gradation, specific gravity determination for RAP material, minimum desirable properties of the RAP material etc. This review paper also provides a narrative review of the historical development of RAP-HMA technology, technical aspects related to the procurement of RAP material, mix design and production of the recycled mix. Moreover, the international & national policies/laws for construction and demolition waste are discussed. |
| first_indexed | 2024-04-11T07:08:21Z |
| format | Article |
| id | doaj.art-dc414e055fc04402b64c01af54aec021 |
| institution | Directory Open Access Journal |
| issn | 2095-7564 |
| language | English |
| last_indexed | 2024-04-11T07:08:21Z |
| publishDate | 2022-10-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Traffic and Transportation Engineering (English ed. Online) |
| spelling | doaj.art-dc414e055fc04402b64c01af54aec0212022-12-22T04:38:18ZengKeAi Communications Co., Ltd.Journal of Traffic and Transportation Engineering (English ed. Online)2095-75642022-10-0195765794Mix design, development, production and policies of recycled hot mix asphalt: A reviewAnkit Sharma0Gondaimei Ransinchung Rongmei Naga1Praveen Kumar2Priti Rai3Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaCorresponding author. Tel.: +91 1332 285584.; Department of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaDepartment of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaDepartment of Civil Engineering, Indian Institute of Technology Roorkee, Roorkee 247667, IndiaWorldwide, flexible pavements are the paramount type of pavements. These national assets can be recycled to serve the next design life without the need to dispose of them in landfill. The old/distressed, flexible pavement material is called, reclaimed asphalt pavement (RAP) material. In view of the sustainable development practice, 100% RAP should be recycled. However, the practical range of RAP incorporation in a drum mix plant ranges from 10% to 50% whereas in a batch mix plant, it is 10%–35%. In a batch mix plant, incorporation of the hot dried RAP (instead of cold RAP feeding) can increase the RAP incorporation level by 20%. Studies recommended that the rejuvenator should be added over the RAP material instead adding with the base binder. The addition of rejuvenator on the RAP conveyor belt (to the pug mill), provided sufficient time for rejuvenating the aged binder coating over RAP aggregates. Further, a thorough knowledge of the mix design process of recycled hot mix asphalt (RAP-HMA) is essential to produce a durable mix. For high RAP content (>20%), the RAP binder properties are important for the mix design process. However, very limited studies discussed (in detail) the recovery process of the RAP binder. The review article through light on the binder recovery process, method of RAP gradation, specific gravity determination for RAP material, minimum desirable properties of the RAP material etc. This review paper also provides a narrative review of the historical development of RAP-HMA technology, technical aspects related to the procurement of RAP material, mix design and production of the recycled mix. Moreover, the international & national policies/laws for construction and demolition waste are discussed.http://www.sciencedirect.com/science/article/pii/S2095756422000836Reclaimed asphalt pavementHot mix asphaltRecycled mixBlending chartRejuvenator doseBatch and drum asphalt plant |
| spellingShingle | Ankit Sharma Gondaimei Ransinchung Rongmei Naga Praveen Kumar Priti Rai Mix design, development, production and policies of recycled hot mix asphalt: A review Journal of Traffic and Transportation Engineering (English ed. Online) Reclaimed asphalt pavement Hot mix asphalt Recycled mix Blending chart Rejuvenator dose Batch and drum asphalt plant |
| title | Mix design, development, production and policies of recycled hot mix asphalt: A review |
| title_full | Mix design, development, production and policies of recycled hot mix asphalt: A review |
| title_fullStr | Mix design, development, production and policies of recycled hot mix asphalt: A review |
| title_full_unstemmed | Mix design, development, production and policies of recycled hot mix asphalt: A review |
| title_short | Mix design, development, production and policies of recycled hot mix asphalt: A review |
| title_sort | mix design development production and policies of recycled hot mix asphalt a review |
| topic | Reclaimed asphalt pavement Hot mix asphalt Recycled mix Blending chart Rejuvenator dose Batch and drum asphalt plant |
| url | http://www.sciencedirect.com/science/article/pii/S2095756422000836 |
| work_keys_str_mv | AT ankitsharma mixdesigndevelopmentproductionandpoliciesofrecycledhotmixasphaltareview AT gondaimeiransinchungrongmeinaga mixdesigndevelopmentproductionandpoliciesofrecycledhotmixasphaltareview AT praveenkumar mixdesigndevelopmentproductionandpoliciesofrecycledhotmixasphaltareview AT pritirai mixdesigndevelopmentproductionandpoliciesofrecycledhotmixasphaltareview |