Performance of SPS-2 Project in Kansas

The Long-Term Pavement Performance (LTPP) SPS-2 experiment was designed to study structural factors, such as drainage, base type, concrete strength and thickness, and lane width, of rigid pavements. The SPS-2 experiment section in Kansas, constructed in 1992, is a jointed dowelled plain concrete pavement. The experiment consisted of 12 standard SPS-2 sections and 1 Kansas DOT control section. These sections have been monitored by the LTPP program since construction. Performance monitoring included measurements for ride quality (International Roughness Index [IRI]), faulting, cracking, and surface deflections. Performance parameters analyzed in this study included IRI, faulting, cracking (combined longitudinal and transverse crack lengths), and joint load transfer efficiency. The results show that the project has performed very well to date. Most sections are smooth and crack-free, with negligible faulting. The load transfer efficiency of the sections has been good too. The drainable sections with a permeable asphalt-treated base have performed the best. These sections were built smoother and remained so after 12 years of service. The section with low PCC slab thickness (8 inches) and low concrete design strength (550 psi) on a dense graded aggregate base has performed the worst. The combination of high slab thickness and high concrete strength tends to mask the effect of the base on pavement performance. The Kansas DOT control section with a thick slab (12 inches) over a dense graded portland cement treated base has also performed very well.

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: 12p
  • Monograph Title: Proceedings of the 2005 Mid-Continent Transportation Research Symposium

Subject/Index Terms

Filing Info

  • Accession Number: 01004288
  • Record Type: Publication
  • ISBN: 9780965231084
  • Files: TRIS
  • Created Date: Sep 21 2005 11:45AM