Grading Indexes of Recycled Coarse Aggregate
Publication: Road Pavement and Material Characterization, Modeling, and Maintenance
Abstract
Content of attached old mortar, apparent density, water absorption ratio and crushing value are key factors governing the behavior of recycled coarse aggregate (RCA). Relation between water absorption ratio and old mortar content attached to the virgin aggregate part of RCA was investigated. An equation to describe relation of water absorption ratio and old mortar content was then put forward and compared with that in references. Relation between apparent density and water absorption ratio of RCA was investigated. The result indicates that water absorption ratio correlates linearly and negatively with apparent density when the apparent density is lower than 2500 kg/m3. Correlation between water absorption ratio and crushing value was also analyzed. In addition, grading indexes of RCA including apparent density, variation coefficient of apparent density, crushing value, old mortar content, Los Angeles loss and water absorption ratio were determined and specified. Three levels of RCA were recommended for different situations.
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Published In
Road Pavement and Material Characterization, Modeling, and Maintenance
Pages: 33 - 39
Copyright
© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Absorption
- Aggregates
- Building materials
- Chemical processes
- Chemistry
- Density currents
- Ecosystems
- Engineering fundamentals
- Engineering materials (by type)
- Environmental engineering
- Fluid dynamics
- Fluid mechanics
- Hydrologic engineering
- Hydrologic properties
- Hydrology
- Infrastructure
- Linear functions
- Materials engineering
- Mathematical functions
- Mathematics
- Mortars
- Pavements
- Recycling
- Sorption
- Transportation engineering
- Water and water resources
- Water content
- Water reclamation
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