Fracture properties of roller-compacted concrete with virgin and recycled aggregates

Eric C. Ferrebee, Alexander S. Brand, Abbas S. Kachwalla, Jeffery Raphael Roesler, Daniel J. Gancarz, James E. Pforr

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

Roller-compacted concrete (RCC) pavement has renewed interest among designers as a sustainable pavement option with the potential to lower total cement content, incorporate recycled aggregates, reduce road closure time, and decrease total project costs. One main design challenge is whether RCC can achieve the same performance life as conventional Portland cement concrete (PCC) pavement with similar slab thickness. This research investigated the strength and fracture properties of RCC containing virgin aggregates and fractionated reclaimed asphalt pave-ment (FRAP) relative to conventional PCC to address this design challenge. The compressive and split tensile strengths of the RCC mixes showed similar strengths to the same constituents in PCC. RCC containing FRAP had lower strengths than did RCC with virgin aggregates. The critical stress intensity factor and the initial and total fracture energies were not statistically different between the RCC mixes containing virgin and F RAP aggregates. Overall, the RCC fracture properties were found to lie significantly higher than those of conventional PCC. At lower stress ratios RCC fatigue data from laboratory beam tests predict lower fatigue life relative to PCC; this result translates to a thicker RCC pavement, large-scale testing has shown that the flexural capacity of PCC slabs is strongly related to the concrete fracture properties despite differences in beam flexural strength. Because these RCC fracture properties were shown to be higher than similar constituents used in conventional paving concrete, RCC designs could employ similar PCC fatigue curves for certain conditions, such as when (lie RCC fracture properties are equivalent to or greater than those of conventional PCC.

Original languageEnglish (US)
Title of host publicationTransportation Research Record
PublisherNational Research Council
Pages128-134
Number of pages7
ISBN (Electronic)9780309295307
DOIs
StatePublished - Jan 1 2014

Publication series

NameTransportation Research Record
Volume2441
ISSN (Print)0361-1981

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanical Engineering

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