Application of Roller Compacted Concrete in Colorado’s Roadways
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2012-10-01
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Subject/TRT Terms:
- Roller compacted concrete
- Compaction
- Strength of materials
- High strength concrete
- Durability
- Cracking of concrete pavements
- Pavement cracking
- Inspection
- Field tests
- Benefit cost analysis
- RCC pavement
- Concrete compaction
- Concrete strength
- Concrete durability
- Concrete cracking
- Field inspections
- Cost/benefit analysis
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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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Main Document Checksum:urn:sha256:b6a8f50e1519822ebe364c18e2d2a826e7de79dd61bb4e946cd5d98436db929b