Rehabilitation of the Ituango Dam

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The Ituango dam is an embankment dam that is currently under construction on the Cauca River near Ituango in Colombia. The largest hydroelectric power plant in Colombia’s history, the dam measures 720 ft (220 m) tall, will produce 2.4 gigawatts and will produce approximately 13% of Colombia’s energy.

Three, large diversion tunnels used to divert the water from the river around the construction site during construction collapsed as a result of heavy rainfalls. The nearly completed pump house had to be flooded to accommodate premature water build-up in the reservoir. These tunnels would need to be permanently sealed.

“Pre-stoppers” would need to be constructed in place to serve as bulk heads between which would ultimately be excavated and back-filled with concrete to permanently seal the tunnels. Additional to standard anti-washout properties, the grout had to withstand swiftly flowing water and exhibit an extended working time at temperatures above 32 degrees C. A custom grout was developed for this application. In the end, hundreds of grout micropiles were tremied, consuming more than 1,650 tons of grout, to produce the pre-stoppers to complete the remediation. The dam is currently scheduled for completion in 2023.

Learning Objectives:
What the Ituango Dam is
Why it was built
What went wrong
How Master Builders solutions supplied a material that met its critical requirements under extreme conditions
Robert has 30+ years of industry experience, 23 years with Master Builders Solutions. Since starting his career with Master Builders Solutions in 1997, Robert has held positions in Quality management, Plant Management, Principle R&D Technician supporting Construction Systems’ powders and coatings product lines and most recent as a Sr technical Product Specialist.

Richard First’s Profile
Richard FirstRelated seminars and products: 1
Sr. Technical Product Specialist
BASF Construction Systems
Rick is a Technical Team Lead with more than 25 years of experience in the construction industry. Rick began his career with Master Builders as an R&D Scientist in 1994 where he worked in the areas of concrete petrography and cement-admixture interactions. Currently, Rick supports the flooring, repair and grout product lines. He provides field support and coordinates both internal and external product training.

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