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IN-WATER
PIER REMOVAL
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Requires no
cofferdam or personnel below the surface.
Remotely operated non-fracturing process separates both concrete & reinforcement. Environmentally clean with minimal disruption to mud and silt. |
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ENVIRONMENTAL
IMPACT
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| UHP
(Ultra-High-Pressure) cutting is an erosive cutting process. UHP causes no fracturing, heat, or impact to the material being sectioned. No change in water Ph or temperature is realized. The resulting particulate is, in dry form, the consistency of talcum powder. |
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Approximately 0.27lbs of pulverized concrete particulate is released for each sq. ft. of material cut. 75% of this
material is pulverized, inert aggregate or crushed gravel, sand and
rock. 25% represents hydraulic cement broken down as follows:
When this material is dispersed in mud, visual detection is not possible. |
| Total process release of cement based on 120.17 sq.ft. of cutting is calculated at 8.075 lbs. This material can be represented in a solid 2.57 inch cube. The debris would be dispersed over a 6,843 sq.ft. work area over a duration of 9 to 36 hours depending on setups and moves. Process removal rates can be extended to maintain release rates that fall within any applicable state or federal regulations. |
| The abrasive powder
agent used in UHP water jet cutting is the gemstone garnet. Garnet that
has been dredged from riverbeds is preferred, as it tends to be alluvial
and less aggressive than mined garnet with sharper edges. Garnet is a very
dense material. One pound of garnet can fit into a small Styrofoam coffee
cup. A typical 4'x 4' pallet will contain several tons of material. Garnet
is totally inert. There are no pathological effects and the mineral is silica
free. Using garnet abrasive powders has no impact on the environment and
is considered to be harmless. As a point of interest, garnet has been used
as the abrasive agent in crest toothpaste for years. |
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Engineering and
Application Information |
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