The use of accelerated cement concrete mixes in reconstruction or rehabilitation of existing highways significantly reduces lane closure times, maintenance and protection of traffic costs, and user delay costs. This study evaluated the development of two accelerated Portland cement concrete mixes which attained a compressive strength of 3000 psi (20.7 MPa) in 24 hours. These design mixes were then placed in high truck traffic pavement areas for field evaluation. The Fast Track concrete construction was monitored and found to be more labor intensive, but otherwise similar to the placement of normal concrete. The use of the nondestructive testing concrete maturity meter, to predict compressive strength as a function of time and performance in these projects, was a valuable quality control tool. This evaluation lasted five years, and the performance has been satisfactory except for initial and minor cracking. The initial cracking may have formed due to slab widths in excess of 14 ft (4.27 m) in the first project, and hairline cracking in the second site may have been caused by excessive heat of hydration. Accelerated rigid paving is recommended as a standard special provision as an alternative to AA concrete for pavements in situations where time of closure is an important factor.


  • English

Media Info

  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 191 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00720206
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-PA-95-006+89-012, Res Proj No. 89-012 A&B, Demonstration Project 201
  • Created Date: Apr 17 1996 12:00AM