A field program of strain and deflection measurements was conducted. The objective of the program was to evaluate the effect of frozen support, tied-concrete shoulder, and tridem-axle loading on concrete pavement performance. Results of the study on the effect of tied-concrete shoulder are presented in this paper. Field measurements were obtained at three pavement project sites located on I-90 in the State of Minnesota. At two of these sites, a 6-in. thick tied-concrete shoulder was used. Measurements included edge and corner deflections and edge strains. Loadings applied were a 20-kip single-axle, a 34 kip tandem-axle, a 42-kip tandem-axle, and a 42 kip tridem-axle. Theoretical analysis was also conducted using a finite element program. Study results indicate that concrete pavement performance is improved when a tied-shoulder is used. For the pavements investigated, deflections along a tied-shoulder joint can be conservatively taken as 85 percent of those along a free edge. Based on study results, it is concluded that for application to the AASHTO thickness design procedure, only one-half of the design 18-kip equivalent single-axle load applications need to be considered for concrete pavements incorporating a tied-concrete shoulder. This recommendation results in a reduction of 1 in. in the required mainline slab thickness given by the AASHTO design procedure. (Author)

Media Info

  • Pagination: 54 p.

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Filing Info

  • Accession Number: 00392220
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-MN-RD-83-03 Intrm Rpt.
  • Contract Numbers: 89076-1
  • Created Date: Feb 28 1985 12:00AM