01547935

Component

https://doi.org/10.3141/2441-17

http://scholar.google.com...forr&publication_year=2014

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 pavement (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 FRAP aggregates. Overall, the RCC fracture properties were found to be 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 the RCC fracture properties are equivalent to or greater than those of conventional PCC.

01547891

14-4010

English

pp 128-134

2014

Transportation Research Record: Journal of the Transportation Research Board

9780309295307

Print

Figures; Photos; References; Tables

Aggregates; Fracture properties; Recycled materials; Roller compacted concrete; Roller compacted concrete pavements; Strength of materials

Virgin materials

Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I32: Concrete; I52: Construction of Pavements and Surfacings

TRIS, TRB, ATRI

Dec 17 2014 9:52AM

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