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Rock Island Arsenal Project |
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In 2005 we were awarded the contract to perform the concrete restoration on Building 220 at the Rock Island Arsenal.
This is a challenging project due to:
- The existing structure is a large manufacturing facility that operations have to remain on-going while these repairs take place.
- The large amount of patching that the building needs.
- The detailed architecture of the building that had to be reproduced with our work.
The reason for these repairs was the age of the structure and lack of cover over the existing rebar.
Prior patching attempts by others have not lasted due to pour workmanship and lack of skill and knowledge.
Scope of work
We removed deteriorated concrete using the pneumatic chipping hammers.
Saw cut all edges of patches. Abrasive blasted on steel and concrete to remove corrosion from steel and open the pores of the concrete.
We applied a corrosion inhibitor to all reinforcing steel. We then applied patch material that has integrated corrosion inhibitors as part of the patch material to stop future corrosion. We increased cover over the existing reinforcing where the building aesthetics would not be affected. Finally we applied two coats of an anti-carbonation elastomeric paint.
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Tank Restoration |
In 2010 we performed an interior tank restoration to keep a local municipality water storage tank functioning properly.
We removed and reinstalled the joint coverings over all the expansion joints. We foam injected / urethane grouted all cracks in the tank.
Performed concrete patching, epoxy coating to the floor and injected epoxy into shear cracks in the divider wall.
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St. Ambrose Project |
In 2006 we were awarded the contract to perform masonry restoration on the interior and exterior of St Ambrose Christ the King Chapel.
On the interior we performed a solid cut and point of the stone, patched the stone and stained the stone.
On the exterior we performed: tuckpointing on deteriorated joints, replaced deteriorated brick, cleaned and applied a water repellent to all the stone and brick.
Challenging aspects of this job was it was part of a larger renovation and addition to the chapel. Access to clean and apply the water repellent to the upper part of the tower involved using a crane due to the height of the tower.
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Campanile at Iowa State University |
The existing roof, roof support structure, four terra cotta
spires and exterior brick masonry were deteriorated.
So the existing roof was removed. New trusses and supports
were installed. The terra cotta spires at the four corners
were dismantled. A new copper roof was fabricated and
installed. The four terra cotta spires were rebuilt using
existing pieces and new pieces of terra cotta.
The brick masonry below the roof was solid tuckpointed.
Deteriorated brick were removed and replaced with new brick.
The brick had to be custom made since the existing brick
that the campanile was built with were of the standard size
which is a longer brick than the modular size that is
typically available today. |
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Iowa State Fair Grandstands |
The
Iowa State Fair Board undertook a large renovation project
on the Iowa State Fairgrounds. One of the major structures
needing repair was the Grand Stand. We were awarded the
contract to perform the restoration on the Grand Stand.
The following work was completed by our firm:
The ends of the concrete seating area were extremely
deteriorated and required extensive concrete restoration. We
removed the deteriorated concrete and concrete around all
exposed reinforcing steel using fifteen pound chipping
hammers. All exposed steel was abrasive blasted and coated
using a corrosion inhibitor/bonding agent. Where steel had
lost more than 15% of its cross-sectional area we installed
new reinforcing steel. We used the form and pour method to
place the new patching material.
We cleaned the seating area using hi-pressure water. To
protect the new and existing concrete from future
deterioration we installed a urethane deck coating system.
On the exterior masonry of the grandstands we performed
cleaning, tuckpointing and stone patching. |
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Davenport Central High School |
In 2002
we were awarded the contract the to perform a major exterior
restoration on Davenport Central High School by the
Davenport Community School District.
The job consisted of solid tuckpointing of the brick and
sandstone, brick replacement, cleaning of the brick and
sandstone, patching of the sandstone, replacement of the
stone cheek walls at the entrances to the school,
application of a water repellant to the brick and sandstone,
application of a stone consolidant to the sandstone.
The reason for all of these repairs was to stop any further
deterioration of the brick and red sandstone. No major
restoration had been done to the school in approximately
thirty years. So the mortar joints were eroded, bricks had
cracked.
Some of the red sandstone had severe erosion or the face of
the stone was quite friable / crumbly. We performed
extensive stone patching around the building.
The application of the water repellant to the sand stone
will keep the sand stone from absorbing water yet still
maintain a high breathablility.
The application of the stone consolidant replaces the
stone’s natural cement which was lost due to the natural
weathering process. The consolidant penetrates into the
stone and chemically reacts with stone grains to form a
glass-like silicon dioxide gel. |
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Iwireless Center of the Quad Cities |
We were
awarded the interior joint sealants of the precast seating
area. Which we sealed using closed cell backer rod and
urethane sealant.
We also performed firestopping around pipe penetrations. |
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Wisconsin State Capitol Building |
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This was a large masonry restoration job for our company.
We worked on this job for two years with a crew of approximately ten workers.
This job consisted of tuckpointing all of the deteriorated stone joints, patching the
deteriorated stone and replacing deteriorated sealant.
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Kinnick Stadium at The University of Iowa |
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In 1998 we were awarded the conctract to replace 15,000 brick and clean the East elevation
of Kinnick Stadium.
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City of Davenport Iowa Skate Park |
The
City of Davenport decided to build a skate park in the
summer of 2006. We were awarded the contract to do the
shotcrete portion of the skate park.
We placed fifteen thousand square feet of shotcrete for this
skate park. Shotcrete for skate parks is extremely labor
intensive due to the tight finish that must be put onto the
surface of the concrete as well as the curvatures that have
to be constructed so the riders have a smooth and enjoyable
ride.
We used the wet shotcrete process where the ready-mix truck
simply backs up and fills the hopper of our pump with the
concrete to be sprayed. |
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Des Moines Iowa Community School District Central Academy
Epoxy
Injection |
In 2008
we were awarded a contract to perform an epoxy injection at
Des Moines Community School District Central Academy.
The job consisted of epoxy injecting a debonded topping slab to
the existing structural slab.
We used multiple system ports and plural component injecting machines
to complete this work. We injected 12,000 square feet of floor area.
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