Laboratory fatigue evaluation of continuously fiber-reinforced concrete pavement.
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Laboratory fatigue evaluation of continuously fiber-reinforced concrete pavement.

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  • English

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    • NTL Classification:
      NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance;NTL-HIGHWAY/ROAD TRANSPORTATION-Construction and Maintenance;
    • Abstract:
      Portland cement concrete (PCC) is the world’s most versatile construction material. PCC has

      been in use in the United States for over 100 years. PCC pavement is generally constructed as

      either continually reinforced concrete pavement (CRCP) or jointed plain concrete pavement

      (JPCP). CRCP is constructed with steel reinforcing totaling about 0.7 percent that is intended

      for crack control and to provide load transfer once cracks have formed by keeping crack faces

      in close contact. JPCP is constructed from unreinforced concrete with steel dowel bars over the

      saw-cut joints to provide load transfer between slabs. CRCP has the advantage of not having

      joints, which leads to better ride quality and generally longer life, if constructed properly. JPCP

      is advantageous because it generally costs about 20 percent less than a comparable CRCP

      section. The major drawback to JPCP is the joints. The relatively large saw-cut joints produce

      more noise generation than CRCP, and create points for water movement into the pavement

      structure. Recently, it has been noticed on a wide scale within the United States that a great

      number of JPCPs in the 15-25 year age range are exhibiting spalling and severe deterioration

      at the joints. Various theories are being explored nationally to explain the causes of premature

      joint deterioration, but all fall into the categories of unwanted moisture at the joint locations or

      damage caused in the sawing process. Concrete is durable and premature joint deterioration is

      unacceptable, as the intended design life of many of these pavement structures is 30-40 years. A

      need exists to produce a jointless pavement with the high cost of CRCP.

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