Why is Water the Enemy of Concrete? (Video)

“Hi, my name is Greg Batista here to answer another question from the internet.

ConcreteCraze asks: If concrete is made with water, why do engineers say water ruins it?

Great question. Concrete needs water for curing, but too much water later is destructive. Once cracks form, rain and saltwater penetrate, reaching the steel reinforcement. Steel expands as it rusts — up to 10 times its original volume — cracking the concrete further. The American Concrete Institute warns that uncontrolled water intrusion is the leading cause of concrete deterioration worldwide. In Florida’s climate, heavy rain and coastal exposure accelerate the process. That’s why waterproofing and sealants are critical. Concrete loves water during curing, but hates it afterward.

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Authoritative references: American Concrete Institute (ACI 201R); International Concrete Repair Institute (ICRI).

The author, Greg Batista, PE, CGC, SI is owner of G. Batista Engineering & Construction and is a nationally-recognized engineer and contractor with more than 35 years of experience and offices in Fort Lauderdale, Florida.