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E7R15 – US 301/SR 45, SR 676A at Bloomingdale & I75 DB

Location: Tampa, Florida

Award: Infrastructure

Project Team

Owner: Florida Department of Transportation District 7

Contractor: Ajax Paving Industries of Florida, LLC Sub Contractor: IPC Paving LLC Architect/Engineer: Patel, Greene, & Associates, LLC Slag Cement/Concrete: Argos

The E7R15 – U.S. 301 design-build project consisted of milling/resurfacing asphalt and the replacement of existing concrete pavement on U.S. 301 south of Bloomingdale, FL, USA, to just north of the I-75 NB ramp, including approximately 500 ft (152 m) east and west on Bloomingdale at the intersection. The critical portion of this project was the time constraints on how the roadway could be closed. Each side of U.S. 301 (North and South) was only allowed to be closed for a total of 35 calendar days each (70 total) and inside that window the intersection on that side had to be completed within 14 calendar days and reopened to traffic. This included all work items and not just the placement of concrete.

The workability of the 50/50 slag cement mixture allowed for the required daily placements to meet schedule constraints. The strength of the concrete was critical especially when working between the two sides. The maintenance of traffic plans required that asphalt be placed on top of the concrete to shift traffic and allow work on the southbound side and, if the strength wasn’t high enough, there was a huge concern with the panels cracking. Once the temporary asphalt was removed, there were no issues found with the concrete.

Application Type

% Slag Cement Replacement

% Portland Cement

% Portland Limestone Cement

% Other SCM (if applicable)


Water/cement ratio

7-day strengths

28-day strengths


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