Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics
The rheological properties of the bituminous components (bitumen and bituminous mastic) within asphalt mixtures contribute significantly to the major distresses of flexible pavements (i.e. rutting, fatigue and low temperature cracking). Asphalt mixtures are usually composed of mastic-coated aggregat...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2015-12-01
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| Series: | Journal of Traffic and Transportation Engineering (English ed. Online) |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095756415305730 |
| _version_ | 1818412891649343488 |
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| author | F. Cardone F. Frigio G. Ferrotti F. Canestrari |
| author_facet | F. Cardone F. Frigio G. Ferrotti F. Canestrari |
| author_sort | F. Cardone |
| collection | DOAJ |
| description | The rheological properties of the bituminous components (bitumen and bituminous mastic) within asphalt mixtures contribute significantly to the major distresses of flexible pavements (i.e. rutting, fatigue and low temperature cracking). Asphalt mixtures are usually composed of mastic-coated aggregates rather than pure bitumen-coated aggregates. The purpose of this study is to investigate the effects of mineral fillers on the rheological behaviour of several polymer-modified bitumens (PMBs) through laboratory mixing. A neat bitumen and two types of polymers (elastomeric and plastomeric) were used to produce PMBs, and two fillers with different minerals (limestone and basalt) were selected to obtain mastics. The dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to characterize the rheological properties of PMBs and mastics. In particular, multiple stress creep recovery (MSCR) tests were performed to evaluate the rutting potential at high temperatures, whereas BBR tests were carried out to investigate the low temperature behaviour of these materials. BBR results for unmodified mastics show that the increase of stiffness is similar regardless of the filler type, whereas results for polymer-modified mastics indicate that the degree of stiffening depends on the combination of filler/polymer types. MSCR results show that adding filler leads to a reduced susceptibility of permanent deformation and an enhanced elastic response, depending on the combination of filler/polymer types. Overall results suggest that a physical–chemical interaction between the filler and bitumen occurs, and that the interaction level is highly dependent on the type of polymer modification. |
| first_indexed | 2024-12-14T10:54:31Z |
| format | Article |
| id | doaj.art-3f4cf91ed5a2485880b100e2e9ab79a9 |
| institution | Directory Open Access Journal |
| issn | 2095-7564 |
| language | English |
| last_indexed | 2024-12-14T10:54:31Z |
| publishDate | 2015-12-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Journal of Traffic and Transportation Engineering (English ed. Online) |
| spelling | doaj.art-3f4cf91ed5a2485880b100e2e9ab79a92022-12-21T23:05:00ZengKeAi Communications Co., Ltd.Journal of Traffic and Transportation Engineering (English ed. Online)2095-75642015-12-012637338110.1016/j.jtte.2015.06.003Influence of mineral fillers on the rheological response of polymer-modified bitumens and masticsF. CardoneF. FrigioG. FerrottiF. CanestrariThe rheological properties of the bituminous components (bitumen and bituminous mastic) within asphalt mixtures contribute significantly to the major distresses of flexible pavements (i.e. rutting, fatigue and low temperature cracking). Asphalt mixtures are usually composed of mastic-coated aggregates rather than pure bitumen-coated aggregates. The purpose of this study is to investigate the effects of mineral fillers on the rheological behaviour of several polymer-modified bitumens (PMBs) through laboratory mixing. A neat bitumen and two types of polymers (elastomeric and plastomeric) were used to produce PMBs, and two fillers with different minerals (limestone and basalt) were selected to obtain mastics. The dynamic shear rheometer (DSR) and bending beam rheometer (BBR) were used to characterize the rheological properties of PMBs and mastics. In particular, multiple stress creep recovery (MSCR) tests were performed to evaluate the rutting potential at high temperatures, whereas BBR tests were carried out to investigate the low temperature behaviour of these materials. BBR results for unmodified mastics show that the increase of stiffness is similar regardless of the filler type, whereas results for polymer-modified mastics indicate that the degree of stiffening depends on the combination of filler/polymer types. MSCR results show that adding filler leads to a reduced susceptibility of permanent deformation and an enhanced elastic response, depending on the combination of filler/polymer types. Overall results suggest that a physical–chemical interaction between the filler and bitumen occurs, and that the interaction level is highly dependent on the type of polymer modification.http://www.sciencedirect.com/science/article/pii/S2095756415305730Bituminous masticsRheological propertiesMineral fillerPolymer-modified bitumens |
| spellingShingle | F. Cardone F. Frigio G. Ferrotti F. Canestrari Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics Journal of Traffic and Transportation Engineering (English ed. Online) Bituminous mastics Rheological properties Mineral filler Polymer-modified bitumens |
| title | Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics |
| title_full | Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics |
| title_fullStr | Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics |
| title_full_unstemmed | Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics |
| title_short | Influence of mineral fillers on the rheological response of polymer-modified bitumens and mastics |
| title_sort | influence of mineral fillers on the rheological response of polymer modified bitumens and mastics |
| topic | Bituminous mastics Rheological properties Mineral filler Polymer-modified bitumens |
| url | http://www.sciencedirect.com/science/article/pii/S2095756415305730 |
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