Admixtures for Underwater Concrete Placement

Concrete is among the most versatile construction materials in the industry. It is used to build everything from sidewalks and home foundations to bridges and high-rise buildings.? When concrete is used in bridge construction or off-shore construction, it creates a unique set of challenges because the concrete is placed under the water. While there are many different methods for underwater concrete placement, getting the right mix is half the battle.

What Are the Problems Associated with Underwater Concrete?

The two main problems that can occur when placing concrete underwater are both related to the mix design.? The first problem is concrete washout.? If the mix has a high water-cement ratio, it can result in the cementitious and sandy materials in the mix washing away in the current of the surrounding water.? The second problem is changes in the water-cement ratio. This can happen if the concrete mix experiences significant segregation, allowing the water surrounding the concrete to seep into the mix.? If too much water seeps into the concrete, it will weaken the mix as it sets up.?

So What is the Solution?

The best way to lower the risk of having problems with underwater concrete placement is to reduce segregation in the mix.? This means controlling the water-cement ratio and the overall viscosity of the mix.? Adding a superplasticizer can help reduce the water requirements of the mix while still providing the right amount of flow.? And there are several different anti-washout admixtures available on the market.? These products help hold the mix together to prevent both washout and water seepage. If you’re looking for an admixture that provides the benefits of a superplasticizer and anti-washout in one bag, try Fritz-Pak’s Hydrocizer. This powerful product tolerates saltwater and freshwater environments and can be used to create mixes that meet all the standards and requirements for underwater concrete mixes.

Want to Learn More?

Go online to fritzpak.com to learn more or request a sample of our Hydrocizer.? Don’t forget to follow our social media channels for more information about how our products can improve your concrete.