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Title:Fractionated Reclaimed Asphalt Pavement (FRAP) as a Coarse Aggregate Replacement in a Ternary Blended Concrete Pavement
Author(s):Brand, Alexander S.; Roesler, Jeffery R.; Al-Qadi, Imad L.; Shangguan, Pengcheng
Subject(s):Reclaimed asphalt pavement, fractionated reclaimed asphalt pavement, RAP, FRAP, concrete, pavement, ternary blend concrete, fly ash, slag, sustainability
Abstract:The use of fractionated reclaimed asphalt pavement (FRAP) was investigated as a partial replacement (0%, 20%, 35%, and 50%) of virgin coarse aggregate in a ternary blend concrete containing cement, slag, and fly ash. The results demonstrated that up to 50% FRAP may be feasible in a concrete to meet the Illinois Department of Transportation strength requirements of 3500 psi compressive and 650 psi flexural strength at 14 days. The results showed that as the percentage of FRAP in concrete increases, the slump increases, the unit weight decreases, and the air content remains relatively unaffected. The compressive, split tensile, and flexural strength all decrease as the percentage of FRAP increases. Likewise, the elastic and dynamic moduli decrease with increasing FRAP content. The free shrinkage appears somewhat unaffected by FRAP content, although the restrained ring shrinkage strains were reduced for concrete with FRAP. The rapid chloride penetration test showed that the presence of FRAP did not alter the permeability rating of very low to low. A test of freeze/thaw durability indicated that adding FRAP to concrete may reduce the durability, although all specimens still retained a sufficiently valued durability factor after 300 freeze/thaw cycles. The results from fracture testing indicated that adding FRAP to concrete may decrease the fracture toughness, although the initial and total fracture energies were not statistically affected. A test of alkali-silica reactivity revealed that the fine FRAP aggregate is not reactive. Tests with a secondary FRAP source revealed that it may not be necessary to process the FRAP to remove the fine particles. Based on the test results, it is recommended that 50% coarse FRAP may be suitable to meet the strength and durability requirements for paving applications.
Issue Date:2012-08
Genre:Technical Report
Publication Status:published or submitted for publication
Peer Reviewed:not peer reviewed
Sponsor:Illinois State Toll Highway Authority RR-10-9075 Task #2
Rights Information:No restrictions. This document is available to the public through the National Technical Information Service, Springfield, Virginia 22161
Date Available in IDEALS:2013-09-23

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