In the past, you may have driven over a bridge and thought to yourself, “how on earth did they even build this in the water?”

Surely they can’t make the bridge foundations off the site then bring them in, because they would be way too heavy.

But surely they also couldn’t make it underwater as the materials will be wet and unable to set, as well as getting moved by the water currents?

To help you understand how bridges are built, we are going to be answering the question “can concrete cure underwater?”.

The Answer

Contrary to popular belief, concrete can in fact cure underwater. 

Using this knowledge, we are then able to use concrete underwater for building purposes.

However, there is a compromise. When using concrete in water, you must ensure that the concrete is injected directly to where it is needed. 

If it is allowed to “fall” in the water, the currents could potentially move the concrete out of the desired location.

The Science

Some people are under the impression that the water in the concrete evaporates and that is how it cures, but this is not the case.

The way that concrete cures is through a chemical reaction.

This reaction takes place between the cement and the water. This reaction bonds the cement with the aggregates to form the concrete.

So having concrete cure underwater can often make it structurally stronger than concrete that is cured in the air.

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