presentation on hydrodemolition of concrete and bridge structures

Presentation on Hydrodemolition of Concrete and Bridge Structures

2014 Virginia Concrete ConferenceRichmond 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

Hydrodemolition Definition

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

Hydrodemolition Pump Unit

Hydrodemolition Robot

Hydrodemolition Vacall Unit

Hydrodemolition Applications

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.

Jack hammer the method of yesterday

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

Hydrodemolition & LMC Use in the United States

Recent Hydrodemolition/LMC Use in Virginia

Fast Track Hydrodemolition Surface

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

Questions / Contact Info

• Ed Liberati, PE• (502)693-3253• eliberati@hughesgrp.com• www.hydro-technologies.com

• AL Kenz• 724-334-7877• modconal@yahoo.com• www.modifiedconcrete.com