Natural ‘antifreeze proteins’ added as a polymer can make concrete more durable

road melting crop
Credit: Drexel University

Because concrete is porous and absorbs liquid, [temperature] changes often make its surface flake and peel. But researchers say a new process can help prevent such deterioration.

[Materials scientist and architectural engineer Wil] Srubar’s laboratory looked to the natural world, specifically “antifreeze” proteins that let some fish and bacteria endure frigid temperatures. In cells, these molecules cling to ice crystals’ surfaces and prevent them from growing too large—but they do not function in highly alkaline cement paste, a key concrete ingredient. So the researchers tried a tougher substance with similar properties: a polymer called PEG-PVA, which is currently used in time-released pharmaceutical pills.

To test it, the team mixed several batches of concrete, including one control, one with air bubbles and a few with different concentrations of the PEG-PVA additive. After 300 consecutive freeze-thaw cycles, the quality of the control sample plummeted while others maintained their integrity.

ADVERTISEMENT
Follow the latest news and policy debates on agricultural biotech and biomedicine? Subscribe to our newsletter.

Srubar has filed a provisional patent and hopes to bring the PEG-PVA process to market within five years. Meanwhile he continues the hunt for molecules that mimic antifreeze proteins’ behavior. “Everybody in my lab is convinced that nature has solved all of our problems for us,” he says. “We just have to know where to look.”

Related article:  Could we ‘rewire our brains’ to stop sugar cravings?

Read the original post

Outbreak Daily Digest
Biotech Facts & Fallacies
GLP Podcasts
Infographic: Here’s where GM crops are grown around the world today

Infographic: Here’s where GM crops are grown around the world today

Do you know where biotech crops are grown in the world? This updated ISAAA infographics show where biotech crops were ...
News on human & agricultural genetics and biotechnology delivered to your inbox.
glp menu logo outlined

Newsletter Subscription

* indicates required
Email Lists
Send this to a friend