Structural Aspects of the Experimental Short CRCP in Sao Paulo

During the year of 2010 it was built the first continuously reinforced concrete pavement (CRCP) in Brazil at the São Paulo campus of University of São Paulo. It was originally intended to verify, for tropical conditions, the occurrences of transversal cracks and its comparison to other crack patterns in other climates. However, funds shortage for such an experimental CRCP and lack of tradition in this constructive method, suggested to explore more immediate and reduced test, yet useful for practitioners. The idea of a seamless concrete pavement is seductive since most of the concrete pavement distresses verified along decades in the country was related to contraction joints and its dowels and tie bars, with particular regards to buses corridors in large cities in the country. CRCP could take the place on plain jointed concrete pavement in buses stops in as much as it could be treated as a reinforced pavement with longitudinal and transversal bars, not requiring saw cut, nor transversal joint dowels, for one lane traffic. Therefore, four short lanes of CRCP were built for the experiment, 50 m wide each one, connected each other at its ending edges through dowel bars; the idea of short slabs, lacking of anchors at section ends, was to check the opening of shrinkage cracks within this system. The entire four lanes have 200 m length, comprising 240 mm of Portland cement concrete (MR > 4.5 MPa), HMA base of 60 mm, 200 mm of dry macadam as sub-base over a fill clay. The four sections have different steel percent at 0.4, 0.5, 0.6 and 0.7%. Several FWD tests were carried out in order to allow the comparison of concrete parameters in field and laboratory in respect to its modulus of elasticity. Monitoring cracks development showed that lack of anchorage makes the short CRCP to behave differently from conventional CRCP.

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• Supplemental Notes:
  • Abstract reprinted with permission from the International Society for Concrete Pavements.
• Corporate Authors:

  International Society for Concrete Pavements

  6305 Oyster Bay Court
  Bridgeville, Pennsylvania  United States  15017
• Authors:
  • Balbo, Jose T
  • Massola, Antonio M A
  • Pereira, Deividi S
• Conference:
  • 10th International Conference on Concrete Pavements
  • Location: Québec City Québec, Canada
  • Date: 2012-7-8 to 2012-7-12
• Publication Date: 2012

Language

• English

Media Info

• Media Type: Digital/other
• Features: CD-ROM; Figures; Photos; References; Tables;
• Pagination: pp 956-966
• Monograph Title: 10th International Conference on Concrete Pavements: Sustainable Solutions to Global Transportation Needs

Subject/Index Terms

• TRT Terms: Continuously reinforced concrete pavements; Modulus of elasticity; Pavement distress; Portland cement concrete; Shrinkage; Structural analysis; Transverse cracking
• Geographic Terms: Sao Paulo (Brazil)
• Subject Areas: Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 01497045
• Record Type: Publication
• ISBN: 978098602910
• Files: TRIS
• Created Date: Oct 29 2013 10:09AM