01088479

Component

This study evaluated the feasibility of using concrete containing recycled asphalt pavement (RAP) in concrete pavement applications. Concrete containing different percentages of RAP were produced in the laboratory, and evaluated for their properties which are relevant to performance of concrete pavements. Using the measured properties of these concretes containing RAP, finite element analysis was then performed to determine how the concretes containing different amounts of RAP would perform if it were used in a typical concrete pavement in Florida. Results of the laboratory testing program indicate that compressive strength, splitting tensile strength, flexural strength and elastic modulus of the concrete decrease as the percentage of RAP increases. The coefficient of thermal expansion appears to be not affected by the RAP content, while the drying shrinkage appears to decrease with increasing RAP content. When analysis was performed to determine the maximum stresses in a typical concrete pavement in Florida under critical temperature and load conditions, the maximum stress in the pavement was found to decrease as the RAP content of the content increases, due to a decrease in its elastic modulus. Though the flexural strength of the concrete decreases as the RAP content increases, an increase in RAP content still results in a decrease in the maximum stress to flexural strength ratio for the concrete. This indicates that using a concrete containing RAP can result in improvement in the performance of concrete pavements.

01084478

08-2711

English

13p

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures; Photos; References (6) ; Tables (12)

Compressive strength; Concrete pavements; Flexural strength; Modulus of elasticity; Recycled materials; Strength of materials; Thermal expansion; Waste products (Materials)

Florida

Highways; Materials; I32: Concrete

Transportation Research Board Annual Meeting 2008 Paper #08-2711

TRIS, TRB

Jan 29 2008 5:09PM