May 30, 2013
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Recent bridge collapses a wakeup call for infrastructure repair?

Bridge collapses in the recent news demand that we need to do more about repairing our infrastructure. HJ3's Carbon fiber systems may be key to repairs.

Bridge Repairs and Reinforcements: A Solution to Aging Infrastructure

Recent bridge collapses in Washington and Missouri have raised alarms across the nation. Debbie Hersman, the chairman of the National Transportation Safety Board, has deemed these incidents a "wake-up call for the nation." In Washington, an aging I-5 bridge collapsed when a truck brushed against its steel framework, resulting in two vehicles and three people plunging into the Skagit River. Shortly after, in Missouri, a highway bridge crumbled when two freight trains collided below, striking one of the bridge's support pillars.

The pressing need for bridge repair is evident. Many bridges constructed in the 1950s and 60s across the United States were designed to last only fifty years. These structures now face the challenges of environmental exposure, increased traffic, and heavier loads, causing them to operate beyond their years and original capacity. The American Society of Civil Engineers (ASCE) infrastructure report card underscores that the clock is ticking for numerous bridges. Unfortunately, transportation funding falls significantly short of the demand for these necessary repairs. In Washington state, approximately 25% of bridges are either structurally deficient or functionally obsolete, while in Missouri, the figure is closer to 30%. Nationwide, the ASCE estimates that one out of every nine bridges in the United States is structurally deficient. The confluence of declining gas tax revenue, political deadlock, and aging bridge infrastructure has created a predicament with no clear solution.

The estimated cost of infrastructure repair and investment in the United States over the next 20 years is a staggering $3.6 trillion. However, amidst this challenge, one cost-effective alternative often overlooked is carbon fiber structural reinforcement. HJ3’s carbon fiber systems offer steel-like strength without the drawbacks of weight and corrosion, resulting in savings of 60% to 90% compared to replacement costs. HJ3’s Civil and Industrial CarbonSeal systems have been successfully applied to a multitude of applications, including bridge repair, steel tank and pipe reinforcement, and underground PCCP and RCP strengthening projects.

Bridge repairs encompass reinforcing supporting columns, slabs, walls, and girders. HJ3’s carbon fiber systems have been deployed in all these areas, delivering substantial cost savings for clients. With the acceptance of carbon fiber composite systems by reputable organizations like the American Concrete Institute (ACI), these innovative repair alternatives are gaining traction in infrastructure projects overseen by state Departments of Transportation. This not only provides a more cost-effective alternative to replacement but also allows for more bridge repairs to be accomplished within budget constraints.

The recent bridge collapses are not isolated incidents but rather a reflection of the thousands of bridges across the US that may be teetering on the edge. Many older bridges rely on engineering design rather than sheer strength or redundancy to maintain their integrity. These riskier spans, known as "fracture critical," risk collapsing if a vital bridge component is compromised. Reinforcement alternatives to replacement, like HJ3’s carbon fiber structural strengthening systems, offer a cost-effective solution that can facilitate more repairs with limited funding.

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