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Recent Projects

Featured Projects

Naval Air Station

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shim_trans  Summery
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shim_trans  Objective
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arrow_right  Project Background
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shim_trans  Scope of Work
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shim_trans  Bravo 25 Description
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shim_trans  Overview
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shim_trans  Crane Rail Removal
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shim_trans  Loss of Transverse
 Negative Moment
 Capacity over the
 Outboard Crane Rail
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shim_trans  Concrete Repair
 Materials
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shim_trans  Top Deck
 Repair Procedure
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shim_trans  Under Deck Repairs
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shim_trans  Cathodic Protection
 System
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shim_trans  Cathodic Protection
 System Installation
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shim_trans  Grout Resistivity
 Measurements
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shim_trans  Reinforcing Steel
 Lead Wire Installation
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shim_trans  Upgrade Reinforcement
 Introduction
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shim_trans  Analysis of Bravo-25
 Load Response
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shim_trans  Calculation of
 Bravo 25 Resistence
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shim_trans  Modes of Failure
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shim_trans  Bravo 25
 Upgrade Design
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shim_trans  Concrete Surface
 Preparation
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shim_trans  Embedded
 Reinforcement
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shim_trans  Wet Lay-up
 Composite Laminate
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shim_trans  Proof Tests using
 Impact Load Method
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shim_trans  Costs
 Acknowledgements
 References
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Turbine Deck Load Capacity Restored


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Home > Featured Project > Pearl Harbor

Featured Project

 

Project Background

This project is part of an ongoing NFESC Repair and Upgrade Program to demonstrate advanced technologies for post strengthening of existing Navy piers. The methodology incorporates the placement of a few ounces/ft2 (gm/m2) of high strength material in strategic locations versus massing hundreds of pounds (kgm) of additional concrete and steel over the entire deck or replacing the superstructure. The simplicity of the upgrade produces only minimal interruptions in pier operations as opposed to closing the pier for up to a year for traditional strengthening. The upgrade program defines and demonstrates the application of post strengthening using fiber-reinforced plastic systems to meet demands due to operational changes that were not included in the original pier design. The program also demonstrates applied sensor systems that provide measurements of performance. The Bravo 25 project specifically demonstrated concrete repair and installation of cathodic protection system with the external reinforcement in a tropic zone. It represented a significant challenge in coordination of interdependent tasks on an operational, steel-reinforced concrete pier.


Scope of Work

The work included concrete repair, cathodic protection installation, and strength upgrades for selected spans between pile bents 177 and 189 on the west end of the berthing and pile bents 216 to 225 on the east end (Figures 2 and 3). The tasks included:

1. Removing the defunct crane rail on the waterfront edge of the deck.
2. Repairing damaged and deteriorated concrete on the deck and track slabs.
3. Sealing existing cracks with silicone.
4. Installing an ICCP system on the bottom of the deck.
5. Embedding pultruded carbon/epoxy rods in the top surface of the deck.
6. Bonding carbon/epoxy laminate to the bottom of the deck.

The cathodic protection system and the upgrade reinforcing were designed for a service life of 20 years.

 

The Navy does not recognize any formal design guidelines or building code approvals for installing titanium-based cathodic protection systems or fiber reinforced plastic composites to upgrade reinforced concrete on maritime waterfront structures. Therefore, it was critical that the Navy’s quality assurance requirements of the specifications be met without compromise. NFESC engineers were on the site continuously to provide quality control of each phase of the construction and to assist the Resident Office in Charge of Construction (ROICC) on technical matters.


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ACE Restoration & Waterproofing, Inc.
620 E. Walnut Ave.
Fullerton, CA 92831
714.526.7366
Fax: 714.526.7965

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  ACE Restoration and Waterproofing Quick Service Overview:
  Concrete repair; concrete restoration, structural upgrade, epoxy injection,
  waterproofing, and more concrete technologies in Fullerton California (CA)
  by ACE Restoration and Waterproofing.

  Concrete Repair, Concrete Restoration, Epoxy Injection, Waterproofing

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