Study of Mechanical Behavior and Self-Cementing Properties of Recycled Concrete Aggregates under Repeated Loading
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
It is known that the strength and stiffness of unbound base and subbase layers prepared with recycled concrete aggregates (RCA) increase over time, known as self-cementing properties of RCA. However, the influence of self-cementing properties on the permanent and resilient deformation behavior has not been thoroughly studied. In this study, the permanent and resilient deformation behavior of two RCA, ORCA and NRCA (old and fresh crushed RCA), after different curing times (1, 180, 360, and 720 days), were investigated by conducting a series of repeated load triaxial tests. The results show that the permanent deformation of NRCA, crushed recently, decreases to a negligible value after curing 180 days, and then reaches a constant value. While the resilient modulus of NRCA increases steadily with curing time till the studied curing time (720 days). Besides, the long-term storage reduces the self-cementing properties of ORCA. As a result, the negligible self-cementing properties have no influence on the permanent and resilient deformation behavior of ORCA.
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Information & Authors
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Published In
International Conference on Road and Airfield Pavement Technology 2023
Pages: 168 - 176
History
Published online: Feb 6, 2024
ASCE Technical Topics:
- Aggregates
- Cement
- Concrete
- Continuum mechanics
- Curing
- Deformation (mechanics)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering materials (by type)
- Engineering mechanics
- Infrastructure
- Material mechanics
- Material properties
- Materials engineering
- Materials processing
- Mechanical properties
- Pavements
- Recycling
- Repeated loads
- Solid mechanics
- Structural dynamics
- Structural mechanics
- Transportation engineering
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