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Earthwork (200-299)

224GEOSYNTHETIC STABILIZED BRIDGE APPROACH (GSBA)

PA · 2026 Standard SpecificationsBook pages 228230View official source ↗

344.3(a) 344.3(e) such as road planers or cold -milling machines designed to mill or shred the existing roadway rather than crush or fracture them is not allowed .

1.a Use equipment capable of automatically metering liquids in the mixture and ensure thorough mixing of the reclaimed materials. Use equipment that is alsoable to record the volumes metered.

1.b Maintain equipment as specified in Section 108.05(c).

2.Placement Equipment. Use a motor grader or another method approved by the Representative.
3.Compaction Equipment. Provide suitable compaction equipment as follows . Use a 25 -ton (or greater)

pneumatic tire roller for breakdown and intermediate rolling if the FDR is emulsion or foamed asphalt based and is less than 8 inches in depth . Use a 25-ton vibratory padfoot roller for initial breakdown if FDR is 8 inches or deeper . Perform finish rolling using a single or tandem steel drum static roller of 12 to 14 tons.

(b)Weather Limitations. Do not place FDR materials when air temperature falls, or is anticipated to

fall, below 40F within the subsequent required 7 -day cure period. Do not perform reclamation in rain, or if rain is anticipated within 2 hours of completion of the work. Cement slurry with accelerating admixtures may be used in periods of cooler temperatures with the written approval of the DME/DMM. Do not place cement slurry mixtures with accelerating admixtures when the air temperature is anticipated to fall below 35F within the first 24 hours following placement.

(c)Quality Control. Provide a QC Plan for the FDR work a minimum of 2 weeks before the start of work.

Identify the equipment, personnel, and processes to be used during the work. Ensure that all equipment is operational and functional before deployment to the job site. All equipment must be properly calibrated before application. This calibration should be verified through the test strip. Operators of water and additive applicators must keep proper records of the amount of material applied and the times of application. Describe means of establishing and controlling centerline, proposed crown and any existing or proposed superelevations.

(d)Test Strip. Before starting full production work, construct a 300 -foot test strip demonstrating the

FDR process including final compaction and shaping. Verify application rates for materials incorporated into the FDR process including stabilization materials and water. Identify and correct aspects of the work not conforming to the contract requirements before proceeding with full production work. If aspects of the work are not found to be adequately controlled to produce the desired mixed and refinished reclaimed roadway, construct additional test strips until the neces

Source: Pennsylvania Department of Transportation Specifications, 2026 Edition. Pages 228230 of 1,522.