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Construction Season Begins
Construction season is underway across Nevada. This month’s newsletter is therefore a cornucopia of resources that help you and your staff navigate the typical construction challenges successfully, so keep scrolling!
Manage Your Construction Projects Effectively
Enroll in this 6-hour, in-person construction management training to become an effective, efficient project manager!
This training presents construction management roles, responsibilities, tools, and techniques that are applicable to various project stakeholders.

 
Keeping Your Agency (and You!) Out of Court
Want to avoid typical design, construction, and maintenance-related risks that can lead to litigation? Enroll in this 7.5-hour, in-person class to learn about risk implications, tort process, and common hazards.
Permit Your Projects Correctly
Learn the environmental permitting requirements associated with a variety of construction and development projects in Southern Nevada! This free workshop is offered by the APWA, Southern Branch on May 25 from 8-12. Register today!
Fund Your Construction Career

Apply for APWA scholarship funds to finance your construction career! Students enrolled in public works-related field, such as civil engineering, construction management, geotech, or surveying, can apply. Applications are due August 3, so don’t delay!

More interested in a career in maintenance? Apply for NVLTAP’s scholarship for a Highway Maintenance Management degree.
Ask Steve

Have a technical question that googling can’t address? Ask Steve! This month’s feature is adapted from an article by the Delaware Center for Transportation.

What are the best practices for identifying and excavating the repair area during a full-depth reclamation treatment?

Full-depth reclamation, or FDR, can be a more cost-effective, durable, and environmentally-friendly option to rehabilitation or removal and replacement techniques. FDR addresses problems with the base or subgrade, typically indicated by depressions, pumping, bottom-up fatigue cracking (thin pavement structure), and underlying stripping.
Example of fatigue cracking that can be addressed by FDR.
According to the Pavement Preservation and Recycling Alliance, FDR:
  • Is 40 to 80% less expensive than alternative reconstruction techniques.
  • Allows for same-day road reopening to light traffic.
  • Reuses up to 100% of existing materials.
  • Limits importing and exporting of materials reduced by as much as 90%.

Identify the Repair Area:

The first step in FDR construction is to identify the area to be repaired. The entire distressed area needs to be removed with repairs extending 12 inches into non-distressed pavement. (Note that the condition of the pavement is usually worse at the bottom than at the top!)

Other Tips:
  • Mark straight boundary lines with areas as rectangular as possible. It is difficult to get good density at corners.
  • On moderately-to-heavily trafficked roads, do not mark a boundary in the 2.5-foot zone that defines the wheel path.
  • Avoid leaving a thin strip of asphalt pavement (less than 18-inches wide) along the pavement edge. Thin strips of asphalt pavement along the pavement edge tend to crack and deteriorate faster under traffic loading. It is better to extend the repair to the pavement edge.
  • Verify the patch boundaries are wide enough to accommodate both the removal equipment and the compaction equipment.

Excavate:

For small patches, use a jackhammer with a spade bit or a masonry saw. Make vertical cuts through the full depth of the asphalt pavement surface. If a jackhammer is used, work from the center of the patch area outward to avoid damaging good pavement.

 

Avoid leaving small areas between repairs.

For medium to large patches, use a diamond-bladed saw to cut the edges. If the distress is only at the surface and the pavement is thick enough, consider a partial-depth cut for thick asphalt pavement surfaces to retain some interlock with the remaining structure.

Be sure to remove all of the defective material in each distressed area using a backhoe. Do not leave a small area between repairs. To avoid damaging the sound pavement, the material needs to be removed starting at a location away from the boundary.

Mill:

Milling is effective at removing certain types of surface distress that can affect the performance of an overlay, such as rutting, surface wear, and cracking. Milling is sometimes needed to remove not only the surface but underlying bound layers to correct problems with rutting, stripping, and other severe forms of pavement deterioration. Some milling machines can remove up to 14 inches of pavement for the full lane width in one pass.

Want more FDR constructions tips? Read Delaware Transportation Center’s FDR article or take NVLTAP’s free, self-paced training.

Have a question? Email Steve.

Training on the Horizon
In-Person Training Virtual Training (live with an instructor) Need more training? Visit the NVLTAP training event calendar.
Contact Steve for your NVLTAP Technical Assistance needs.
Contact Nancy for your NVLTAP Training needs.
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