SR 195 Yuma (Ave. B to County 14th St.)

The work consisted of constructing a new 4-lane, divided roadway with 2 new concrete bridges and other incidental work. The pavement structural sections for SR 195 consisted of 6 inches of ADOT 416 ¾” Special Mix Design placed in two 3” lifts for the entire width of the road, including shoulders. The final lift was an ADOT 414, AR-ACFC, placed at a ½” depth at a width of twenty five feet. All of the asphaltic concrete was produced from a mobile hot plant and all of the mineral aggregates were mined on-site. The 416 ¾” Special Mix was an ADOT specification utilizing percent within limits found in the Special Provision for the job. The mixture properties and limits included laboratory air voids, gradation and asphalt content.

To maximize the quality of ride on the new surface, a grade trimmer was used on both the sub grade and the aggregate base course. Although the conventional method of motor graders and blue tops hubs has been the standard of the industry for years, all grades were established from a single control point at 500° intervals and computer models programmed into the machines.

This project received a National Asphalt Paving Association Quality in Construction Award as the project achieved record-breaking IRI Values/Smoothness incentives all while maintaining excellent working relationships with all project stakeholders.


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