Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture
Fatigue failure is regarded as one of the most common failures in the road pavement and necessitates spending huge cost annually to maintain the road. Asphalt binder modification and asphalt mixture reinforcement are among the commonly used methods to increase the pavement resistance to a failure ca...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2020-01-01
|
| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8845647 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832547737665536000 |
|---|---|
| author | Gholamali Shafabakhsh Mahdi Akbari Hossein Bahrami |
| author_facet | Gholamali Shafabakhsh Mahdi Akbari Hossein Bahrami |
| author_sort | Gholamali Shafabakhsh |
| collection | DOAJ |
| description | Fatigue failure is regarded as one of the most common failures in the road pavement and necessitates spending huge cost annually to maintain the road. Asphalt binder modification and asphalt mixture reinforcement are among the commonly used methods to increase the pavement resistance to a failure caused by fatigue. By proposing a modified-reinforced composite hot mix asphalt (MRC-HMA), the present study aimed to examine the fatigue life of this mixture with one of the most traditional methods (i.e., four-point bending beam fatigue test) and compare it at constant strain conditions and the strain levels of 500, 700, and 900 με and a temperature of 20±0.8°C to that of the other three specimens, including control specimens, geogrid-reinforced (GR-HMA) specimens, and nanosilica-modified (NSM-HMA) specimens with 5% nanosilica. In all experiments, the condition to reach the failure stage was assumed equivalent to a 50% reduction in the stiffness coefficient in each load repetition, and the load was applied semisinusoidal at a frequency of 10 Hz without rest. The results showed that the MRC-HMA mixture improved the fatigue life at the strain level of 500 μs by about 701, 172.5, and 156.4% compared to the control, NSM-HMA, and GR-HMA specimens, respectively. Based on the results, the use of GR-HMA specimens has almost the same results as NSM-HMA ones, but the use of the MRC-HMA mixture can significantly increase the fatigue life of MRC-HMA in all three levels of strain compared to all specimens studied in the present study. Thus, the introduced mixture can be a proper choice for pavements with heavy or light (with a large amount) traffic loads, which usually have a vast adverse effect on the fatigue behaviour of asphalt mixtures. |
| format | Article |
| id | doaj-art-cce222ec2df541f4ae7214de34205264 |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-cce222ec2df541f4ae7214de342052642025-02-03T06:43:36ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88456478845647Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt MixtureGholamali Shafabakhsh0Mahdi Akbari1Hossein Bahrami2Faculty of Civil Engineering, Semnan University, Semnan, IranFaculty of Civil Engineering, Semnan University, Semnan, IranFaculty of Civil Engineering, Semnan University, Semnan, IranFatigue failure is regarded as one of the most common failures in the road pavement and necessitates spending huge cost annually to maintain the road. Asphalt binder modification and asphalt mixture reinforcement are among the commonly used methods to increase the pavement resistance to a failure caused by fatigue. By proposing a modified-reinforced composite hot mix asphalt (MRC-HMA), the present study aimed to examine the fatigue life of this mixture with one of the most traditional methods (i.e., four-point bending beam fatigue test) and compare it at constant strain conditions and the strain levels of 500, 700, and 900 με and a temperature of 20±0.8°C to that of the other three specimens, including control specimens, geogrid-reinforced (GR-HMA) specimens, and nanosilica-modified (NSM-HMA) specimens with 5% nanosilica. In all experiments, the condition to reach the failure stage was assumed equivalent to a 50% reduction in the stiffness coefficient in each load repetition, and the load was applied semisinusoidal at a frequency of 10 Hz without rest. The results showed that the MRC-HMA mixture improved the fatigue life at the strain level of 500 μs by about 701, 172.5, and 156.4% compared to the control, NSM-HMA, and GR-HMA specimens, respectively. Based on the results, the use of GR-HMA specimens has almost the same results as NSM-HMA ones, but the use of the MRC-HMA mixture can significantly increase the fatigue life of MRC-HMA in all three levels of strain compared to all specimens studied in the present study. Thus, the introduced mixture can be a proper choice for pavements with heavy or light (with a large amount) traffic loads, which usually have a vast adverse effect on the fatigue behaviour of asphalt mixtures.http://dx.doi.org/10.1155/2020/8845647 |
| spellingShingle | Gholamali Shafabakhsh Mahdi Akbari Hossein Bahrami Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture Advances in Civil Engineering |
| title | Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture |
| title_full | Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture |
| title_fullStr | Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture |
| title_full_unstemmed | Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture |
| title_short | Evaluating the Fatigue Resistance of the Innovative Modified-Reinforced Composite Asphalt Mixture |
| title_sort | evaluating the fatigue resistance of the innovative modified reinforced composite asphalt mixture |
| url | http://dx.doi.org/10.1155/2020/8845647 |
| work_keys_str_mv | AT gholamalishafabakhsh evaluatingthefatigueresistanceoftheinnovativemodifiedreinforcedcompositeasphaltmixture AT mahdiakbari evaluatingthefatigueresistanceoftheinnovativemodifiedreinforcedcompositeasphaltmixture AT hosseinbahrami evaluatingthefatigueresistanceoftheinnovativemodifiedreinforcedcompositeasphaltmixture |