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- Title
Exploitation of Roller Compacted Concrete Based on Recycled Aggregates as a Solution for Degraded Pavements: Experimentation and Modeling.
- Authors
Nehar, Kheira Camellia; Benamara, Dalila; Hamla, Wafa
- Abstract
It is widely admitted that the repeated passage of heavy goods vehicles as well as environmental conditions are the main causes of damage to road structures. This sometimes requires the use of rehabilitation techniques to maintain the road in operational and safe condition and extend its life. The current trend in the world is to find new low cost materials that are able to guarantee the best performance of pavements; the Roller Compacted Concrete (RCC) is a good example. This work is mainly concerned with the use of more rigid local materials in the construction of roads and their placement by compaction instead of flexible asphalt concrete wearing courses which have been shown several drawbacks. Indeed, flexible asphalt concrete wearing courses become softer under heavy traffic and require a very expensive bituminous material supply. It is therefore urgent today to find cost-efficient road construction techniques that can combine durability and hardness. The strategy used in this research consists, on the one hand, in making a roller compacted concrete made of recycled aggregates using materials from local deposits with a low dosage of cement, and on the other hand, to validate this study numerically by evaluating the maximum compressive strength and then to model the cracked sections of roller compacted concrete containing recycled aggregates in order to develop a new method that allow minimizing the degradation of pavements. This would certainly make the present research paper more original. The results obtained allowed to find that it is quite possible to manufacture roller compacted concrete with partial incorporation of recycled aggregates with compressive strength acceptable and approximately equal to 34 MPa at 28 days. This type of RCC is more resistant and less dangerous because recycled aggregates improve the behavior of pavements, especially in the presence of cracks where we found that the stress intensity factor for RCC with natural aggregates (− 1.1631 MPa√m) is greater than in RCC with recycled aggregates (− 0.4989 Mpa√m).
- Subjects
ROLLER compacted concrete; BITUMINOUS materials; ASPHALT concrete; PAVEMENTS; ASPHALT pavements; CONCRETE pavements; ROAD construction
- Publication
Arabian Journal for Science & Engineering (Springer Science & Business Media B.V. ), 2022, Vol 47, Issue 4, p5303
- ISSN
2193-567X
- Publication type
Article
- DOI
10.1007/s13369-021-06458-x