Evaluation of mix ingredients on the performance of rubber-modified asphalt mixtures

Thesis/Dissertation · Thu Jan 01 00:00:00 EST 1987

OSTI ID:5487346

Takallou, H B

In rubber-modified asphalt pavements ground recycled tire particles are added to a gap-graded aggregate and then mixed with hot asphalt cement. In view of the significant reductions in wintertime stopping distances under icy or frosty road surface conditions, the use of coarse rubber in asphalt pavements should be seriously considered. This research project consisted of a laboratory study of mix properties as a function of variables such as rubber gradation and content, void content, aggregate graduation, mix process, temperature, and asphalt content. Twenty different mix combinations were evaluated for diametral modulus and fatigue at two different temperatures. Also, five different mix combinations were evaluated for static creep and permanent deformation. The findings of the laboratory study indicate that the rubber gradation and content, aggregate gradation, and use of surcharge during sample preparation have considerable effect on modulus and fatigue life of the mix. The results of static creep and permanent deformation tests indicate that the rubber asphalt mixes had low stability and high elasticity. Also, due to greater allowable tensile strain in rubber-modified mixtures, the thickness of the modified mixture can be reduced, using a layer equivalency of 1.4 to 1.0

• Research Organization: Oregon State Univ., Corvallis, OR (USA)
• OSTI ID: 5487346
• Resource Relation: Other Information: Thesis (Ph. D.)
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
ASPHALTS
WASTE PRODUCT UTILIZATION
PAVEMENTS
TIRES
BENCH-SCALE EXPERIMENTS
CHEMICAL PROPERTIES
CREEP
DEFORMATION
ELASTICITY
FATIGUE
FRICTION FACTOR
MECHANICAL PROPERTIES
MIXTURES
PERFORMANCE
PERFORMANCE TESTING
QUANTITY RATIO
SERVICE LIFE
STABILITY
TENSILE PROPERTIES
THICKNESS
BITUMENS
DIMENSIONS
DISPERSIONS
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
TAR
TESTING
320305* - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management