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Presentation on Hydrodemolition of Concrete and Bridge Structures

Presentation on Hydrodemolition of Concrete and Bridge Structures. 2014 Virginia Concrete Conference Richmond Virginia March 6 2014. Outline for Today. Definition of Hydrodemolition Different types of Hydrodemolition Hydrodemolition Equipment Applications for Hydrodemolition

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Presentation on Hydrodemolition of Concrete and Bridge Structures

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  1. Presentation on Hydrodemolition of Concrete and Bridge Structures 2014 Virginia Concrete Conference Richmond Virginia March 6 2014

  2. Outline for Today • Definition of Hydrodemolition • Different types of Hydrodemolition • Hydrodemolition Equipment • Applications for Hydrodemolition • Where Hydrodemolition is the preferred method of deteriorated concrete removal. • Issues with Conventional methods • Local Projects and where its used • Fast Track Structure Rehabilitation

  3. Hydrodemolition Definition

  4. Hydro Flow and Pressures • Basically there are 2 types of Hydrodemolition • High Pressure above 25,000 psi with low water flow rate of 25 gallons per min and less. • Low pressure approximately 15,000 psi and high water flow rates of 55 gallons per min.

  5. Hydro means Water • Hydrodemolition water needs to be Clean and Potable due to the tight tolerances' of the pump units • Best option is to receive water directly from a fire hydrant • Trucking water is generally the second option • Filtration units can be used to draw from lakes and streams.

  6. Hydrodemolition Equipment • Water Source • Power unit • Computerized robot • Carriage and protection shroud • Cutting nozzle and lance • Vacume Truck

  7. Hydrodemolition Pump Unit

  8. Hydrodemolition Robot

  9. Hydrodemolition Vacall Unit

  10. Hydrodemolition Applications

  11. Preferred Method for Rehabilitation • Total Surface Hydro to Remove Bad Concrete • Structural Concrete Overlays with Latex Modified Concrete • Flexibility of products depending on traffic • Largest overlay job in United States bid with this method.

  12. Jack hammer the method of yesterday

  13. Micro cracks and no bond is shown on a thin section after use of a jackhammer.

  14. Hydrodemolition & LMC Use in the United States

  15. Recent Hydrodemolition/LMC Use in Virginia

  16. Fast Track Hydrodemolition Surface

  17. Fast-Track Bid Items • Scarification of deck Surface- SQ YD. • Total Surface Fast-Track Hydro-demolition to remove bad concrete- SQ YD • Placement of Latex Concrete Overlay at consistent Depth – SQ YD • Variable Depth Latex Concrete for quantities above the consistent depth- CUBIC YARD material cost only

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