A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Underwater Crack Repair
The objective of this research to investigate the use of advanced chemical mixtures for modifying the fluidity and viscosity properties of cement-based grouts or mortars so they can be placed in water flowing into cracks or open voids. Specifically, the materials must be able to withstand washout when placed directly in front of cracks in concrete dams or voids in embankments. A simplified method of delivery is desirable to either eliminate the need for, or reduce the time for divers repairing crack. This method involved modifying the viscosity of the grout/mortar depending on the head of the water level and allowing the water pressure alone to pull it into the structure. The strength of the materials should be similar to the strength of the concrete to withstand the stresses of thermal movement. If sufficient filler is introduced into the crack, it might completely fill the crack or allow sufficient reduction in leakage so that other, more permanent methods of sealing can be used without draining the reservoir. Experience at Upper Stillwater Dam, Utah have shown that introducing hydrophilic, polyurethane grouts in flowing water was only temporarily effective, and at great cost.
Underwater Crack Repair
The objective of this research to investigate the use of advanced chemical mixtures for modifying the fluidity and viscosity properties of cement-based grouts or mortars so they can be placed in water flowing into cracks or open voids. Specifically, the materials must be able to withstand washout when placed directly in front of cracks in concrete dams or voids in embankments. A simplified method of delivery is desirable to either eliminate the need for, or reduce the time for divers repairing crack. This method involved modifying the viscosity of the grout/mortar depending on the head of the water level and allowing the water pressure alone to pull it into the structure. The strength of the materials should be similar to the strength of the concrete to withstand the stresses of thermal movement. If sufficient filler is introduced into the crack, it might completely fill the crack or allow sufficient reduction in leakage so that other, more permanent methods of sealing can be used without draining the reservoir. Experience at Upper Stillwater Dam, Utah have shown that introducing hydrophilic, polyurethane grouts in flowing water was only temporarily effective, and at great cost.
Underwater Crack Repair
T Dolen (author) / K Bartojay (author) / K Mitchell (author)
2007
32 pages
Report
No indication
English
Manufacturing, Planning, Processing & Control , Underwater Construction & Habitats , Tooling, Machinery, & Tools , Manufacturing Processes & Materials Handling , Underwater repairs , Crack testing , Chemical grout , Motar mixtures , Fillings , Drains , Concrete cylinders , Dam safety , Water loss , Leakage elimination , Colorado
Crack detection and grouting repair device for underwater concrete
| European Patent Office | 2024
Underwater concrete structure crack repair method and hybrid packer for the same
| European Patent Office | 2019