Implementation of Proven PCCP Practices in Colorado

Details

• Creators:
  Ardani, Ahmad
• Corporate Creators:
  Colorado. Department of Transportation
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  14-foot Slabs Benefit Cost Analysis Best Practices Concrete Pavements Implementation Longitudinal Cracking Longitudinal Tining Narrow Joints Pavement Grooving Pavement Joints Pavement Widening Portland Cement Concrete Slabs Specifications Texture

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• Publication/ Report Number:
  CDOT-DTD-R-2006-9
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Final Report
• Corporate Publisher:
  Colorado. Department of Transportation
• Abstract:
  This paper is an overview of the proven concrete pavement practices that the Colorado Department of Transportation (CDOT) has implemented over the last several years. These include implementation of the following practices: (1) Implementation of Longitudinal Tining: Nine test sections were constructed on I-70 near Denver, Colorado with varying textural characteristics. Texture depth, skid numbers at different speeds, and their noise properties were measured. Based on the finding of this research study CDOT adopted the longitudinal tining (uniformly spaced ¾ in.) as a preferred method of texturing concrete pavements in 1997. Longitudinally tined portland cement concrete pavement (PCCP) exhibits low noise levels and provides adequate friction. (2) Implementation of the Wider Slab, SPS-2 Experiment Spin-Off Product: This experiment dealt with various structural factors in concrete, one of which was the wider slab (14-ft slab). The results of this study revealed that 2 ft of widening was adequate. Structurally speaking, their contributions were found to be equivalent to 1 in. of slab thickness. (3) Implementation of Single-Cut Joints, SPS-4 Experiment Spin-Off Product: The results of this study revealed that the single cut (1/8 in. joints) were as effective as CDOT's standard double cut (3/8 in. joints). The only difference was that the narrower joints were less labor-intensive and required much less sealant material. Based on a cost-benefit analysis, a saving of 57 cents per linear foot of joint was realized, which equates to approximately 1.7 million dollars per 100 miles of 2-lane concrete pavement. (4) Addressing Premature PCCP Longitudinal Cracking: This experiment presents an evaluation of several PCCP with premature longitudinal cracking. All of the locations discussed are in Region 1 of the CDOT. This study resulted in 2 new specifications: 1- Requiring the engineer to measure saw-cut depth at intervals of 1 per 1/10 of a mile (528 ft); and 2- Requiring paving contractors to equip their paving machines with vibrator monitoring devices.
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:84719b3143aefd60c07c399da9532a980095af4a04e1c38d92250b20dd421642cdfbf6d80c646563ada77d9bc643a30773c18348c46367dfddfb7ec59a256058
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93128/dot_93128_DS1.pdf
• File Type:
  [PDF - 1.66 MB ]