United States Department of Transportation
i
Application of Roller Compacted Concrete in Colorado’s Roadways
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2012-10-01
[PDF-3.16 MB]
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Abstract:Roller Compacted Concrete (RCC) is a no-slump concrete mixture that is transported, placed, and compacted with
the same construction equipment as asphalt pavement. RCCs were used to construct three sections of pavement in
Weld County Road 28 (WCR 28), eastbound of State Highway (EB 66), and westbound of State Highway (WB 66).
Three sets of field inspections were conducted: 1) during construction; 2) nine months after construction; and 3) two
years after construction. Strength and durability behaviors of the RCCs were tested right after construction, and
some of the material properties of the RCCs were further tested nine months after construction. Field inspections
showed that the diamond ground surface texture of EB 66 and WB 66 is better and smoother than the surface of
WCR 28 where large cracks and chipping occurred along both longitudinal and transverse directions. The relatively
poor quality of RCC samples at WCR 28C location may be due to the different quality of concrete mix, the degree
of compaction used during construction, and the absence of saw cut joints. The concrete specimens were tested for
rapid chloride permeability, drying shrinkage, freeze-thaw resistance, compressive strength, splitting tensile
strength, and flexural strength. The test results obtained after the construction indicated that the chloride
permeabilities are in the low to very low ranges, the drying shrinkages are in the normal range, and freeze-thaw
resistance is fine. The compressive strength, splitting tensile strength, and flexural strength are also in the normal
range similar to that of conventional concrete. The test results obtained nine months after the construction indicated
that deteriorations occurred in the RCC concretes.
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