Portfolio

Owner: Maryland Transportation Authority Removal and replacement of deteriorated concrete in the fresh air duct which runs under the I-95 roadway in the tunnel. Both overhead and vertical work; completed at nighttime only. Weather is a major factor is getting access to the site; if rain or snow, no tunnel closure and therefore no work. [...]

This bridge had severe spalling at the waterline. Two contractors had previously attempted to effect the repairs using form and pump methods which were singularly ineffective. CGCC offered the FLDOT a 3 year “no crack” guarantee as enticement to attempt a shotcrete rehabilitation. As of 2010, it has been 5 years without a call-back. 5000 [...]

This 40 year old storm sewer runs underneath a major apartment building and adjacent parking lot in downtown Rockville, MD. The storm sewer was corroding and starting to buckle in several locations. This project was bid with 2 options, the first being slip-lining and the second being shotcrete. The bids for rehabilitating the CMP with [...]

The Westview Tower is a 13 story retirement/elderly apartment complex in Knoxville, TN. There were severe structural problems discovered in the ceiling of the 13th floor. The roof slab had corroded reinforcing steel and it extended throughout the entire 10,000 square foot (929 m2) footprint. Concrete was removed & replaced up to a depth of [...]

In 1986, CGCC performed extensive repairs to the Bonner Bridge and satisfied the NC Department of Transportation’s requirement for an additional 5 years of life for the bridge. Twenty years later, CGCC was back again to do 7 times the original amount of repairs to the bridge, and it is significant to note that all [...]

CGCC installed 18”- 36” thick 4000 psi shotcrete over 2 cages of reinforcing steel to create the exterior and interior finished walls for the underground parking garage of the Hilton Baltimore Convention Center Hotel. The walls are 2 stories high and 1200 feet long. As soon as the reinforcing steel cages were installed, the wet-mix [...]

140,000 square feet of dry-mix shotcrete was placed on cooling Tower I & Tower II at the St. Johns River Power Park. The surface to be shot was first prepped by hydroblasting. Next, reinforcing steel was re-installed and replaced on the towers. Then a layer of shotcrete was placed to cover the reinforcing steel. Then [...]

This 20’ X 15’ century-old sewer was lined with 5000 psi, silica-fume modified, fiber and steel reinforced shotcrete and concrete. The structure was originally built of fitted limestone with a brick invert. Due to the confined spaces and large volume of material, the shotcrete was placed using the wet-mix process. Difficulties included diverting and by-passing [...]