01158038

Component

https://doi.org/10.3141/2164-15

http://scholar.google.com...rgin&publication_year=2010

This study evaluated the feasibility of using concrete containing recycled concrete aggregate (RCA) in concrete pavement application. Concrete containing 0%, 25%, and 50% RCA was produced in the laboratory and properties vital to the performance of concrete pavement were evaluated. Results from the laboratory testing program indicate that the compressive strength and elastic modulus are reduced slightly as the percentage of RCA increases. The flexural strength, splitting tensile strength, and coefficient of thermal expansion are about the same for concrete containing virgin aggregate and RCA. The free shrinkage increases slightly as the percentage of RCA increases. With the measured properties, a finite element analysis was performed to determine how the concretes containing the different amounts of RCA would perform if they were used in a typical concrete pavement in Florida. Analysis from the finite element model determined the maximum stresses under critical temperature and load conditions. Potential performance of the pavements was evaluated based on the computed maximum stress to flexural strength ratio. The maximum stress to flexural strength ratio in the pavement was found to stay about the same as the percentage of RCA increases. This indicates that RCA can be used in concrete pavement without affecting its performance.

01223314

10-1448

English

pp 113-121

2010

Transportation Research Record: Journal of the Transportation Research Board

9780309142960

Print

Figures (4) ; References (10) ; Tables (14)

Compressive strength; Concrete; Concrete aggregates; Concrete pavements; Finite element method; Flexural strength; Laboratory tests; Modulus of elasticity; Pavement performance; Recycled materials; Shrinkage; Stresses; Tensile strength; Thermal expansion

Coefficient of thermal expansion; Recycled concrete aggregate

Florida

Highways; Materials; Pavements; I23: Properties of Road Surfaces; I32: Concrete

TRIS, TRB, ATRI

Jan 25 2010 10:39AM

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