Presentation on theme: "Presentation on Hydrodemolition of Concrete and Bridge Structures 2014 Virginia Concrete Conference Richmond Virginia March 6 2014."— Presentation transcript:
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 Where Hydrodemolition is the preferred method of deteriorated concrete removal. Issues with Conventional methods Local Projects and where its used Fast Track Structure Rehabilitation
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.
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.
Hydrodemolition Equipment Water Source Power unit Computerized robot Carriage and protection shroud Cutting nozzle and lance Vacume Truck
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.
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