Construction Management / Construction Inspection

The purpose of this project is to utilize CTDOT’s new Ultra High-Performance mix design for Concrete (UHPC) to repair and rehabilitate seventeen (17) bridges that have deteriorated beam ends, and to preserve each bridge’s condition, extending their service life. This project is taking place in District 1 within the towns of Middletown, Tolland, Southington, Meriden, Rocky Hill, Plainville, Cromwell, New Britain, Wethersfield, and East Hartford.

- UHPC Beam End Repairs utilize a 20 ksi mix that is poured through a PVC pipe at the beam ends and are attached to the girder utilizing welded studs to both the web and flanges. The welded studs increase the shear strength of the girder once encased in UHPC and prevent further deterioration of the beam due to the joint above. This replaces the previous rehabilitation method of welding steel plates to reinforce beam ends.
- Laser Ablation Coating Removal (LACR) utilizes a 1,000-Watt laser with a pulse frequency between 24-40 KHz to remove the lead-based paint at the area of UHPC repair. The LACR utilizes a built-in fume collector that captures the effluent at the source of removal. The fume extractor is comprised of a multi-stage carbon filter with HEPA filtration. This process reduces the need for full containment for blasting and eliminates most of the debris disposal.

Other work in the project includes, but is not limited to:
- Replacing deck joints and deteriorated deck ends on all bridges
- Providing UHPC link-slab to eliminate deck joint at one bridge
- Cleaning and painting beam ends
- Removal and disposal of lead paint
- Bearing rehabilitation which includes either cleaning & painting or replacement with elastomeric pads while utilizing jacking
- Repairing deteriorated concrete pedestals and pier caps
- Strip patch, membrane, and overlay (SPMO) bridge decks
- Peen cover plate welds
- Deck repair both partial and full depth.