Characterization of cold recycled asphalt mixtures

Thesis/Dissertation · Fri Jan 01 00:00:00 EST 1982

OSTI ID:7149291

Tia, M

In this study, the long-term behavior of the cold-recycled asphalt mixtures was investigated through nine experimental designs. The scope of the study covered two types of pavement material, three levels of oxydized condition of the old binder and one type of virgin aggregate. The added softening agents included a high-float asphalt emulsion AE-150, a foamed asphalt, and the rejuvenating agents, Reclamite, Mobilsol and DUTREX 739. The Water Sensitivity Test was used to evaluate the resistance of the recycled mixes to water. The results of the study indicated that most of the rejuvenating action of the added binder on the old binder took place during the compaction process. The binders of the recycled mixes which underwent the initial softening during the compaction process generally increased in stiffness with increasing curing time. The results indicated that the gyratory stability index and the gyratory elasto-plastic index could be used to determine the optimum binder content of a recycled mix. However, they could not be used to estimate the resilient modulus or the Marshall stability of the mix.A higher compactive effort generally produced a higher resilient modulus and Marshall stability of the recycled mix. When the binder content is too high, a higher compactive effort generally produces a lower Hveem R-value.The structural performance of these recycled mixes was compared to that of an asphalt concrete using a linear elastic multilayer analysis.

• OSTI ID: 7149291
• Resource Relation: Other Information: Thesis (Ph.D.)
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ASPHALTS
RECYCLING
BINDERS
COLD WORKING
COMPACTING
CONCRETES
ELASTICITY
MATERIALS TESTING
MEASURING METHODS
MECHANICAL PROPERTIES
MIXTURES
PAVEMENTS
PERFORMANCE
PLASTICITY
BITUMENS
BUILDING MATERIALS
DISPERSIONS
FABRICATION
MATERIALS
MATERIALS WORKING
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
TAR
TENSILE PROPERTIES
TESTING
360601* - Other Materials- Preparation & Manufacture
360603 - Materials- Properties