While bridges are a significant part of their work, the company added several Cemen Tech units to augment the accuracy and precision required this type of work. Decades Of High-Quality LMC With Volumetric Mixersĭelong Concrete in Lexington, Kentucky began using volumetric mixers with LMC in the early 1970s as part of bridge deck work the company handled. The bridge was one of 184 across the state targeted for improvement or construction during fiscal year 2019, according to IDOT. Using two Cemen Tech mixers, including a 25-year-old unit, the company poured LMC as part of a complete bridge deck replacement. In May 2019, Henry Frerk Sons took part in a $2,000,000 interstate reconstruction project with the Illinois Department of Transportation (IDOT). With an annual average daily traffic of 113,100 vehicles on Interstate 55 in Livingston County, Illinois, the wear and tear takes a heavy toll. Because both mixes are highly engineered, mixing at the job site eliminates several downsides associated with conventional delivery systems, including: Mobile concrete mixers are commonly used to produce high-quality mix designs used to produce a latex modified concrete bridge deck overlay. How A Volumetric Mixer Protects The Mix Integrity ![]() Highway engineers now require a long-lasting material that repairs the damage and prevents deicing salts from reaching the reinforcement steel. Because rust occupies more volume than iron, the bridge deck deteriorates more quickly due to rust expansion. If the concrete has cracks, the deicing salt materials may reach the reinforcement steel below, causing the steel to rust. In response, highway departments use salt-based deicing materials on the surface. People expect roads and bridges to be free of snow and ice shortly after the storm subsides. How Ice & Snow Removal Practices Affect Bridge Decks ![]() Yet, latex modified concrete (LMC) is a common way to protect the steel with a bridge deck overlay. These structural components contain an immense amount of reinforcing steel. ![]() This is because they’re exposed to weather conditions on the top and bottom, unlike sidewalks and other concrete flatwork. In colder climates, bridge decks undergo a freeze-thaw cycle more severe than other types of concrete infrastructure. Why Latex Modified Concrete Is Used For Cold Climate Bridge Deck Overlays These solids and how they act once in contact with an inorganic surface are vital to creating the external waterproof layer. Latex modified concrete is a blend of latex solids - usually around 15 percent - mixed with the concrete at a microscopic level.
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