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.

Related article:  Can adult brains grow new neurons? New study says yes.
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.”

Read the original post

Outbreak Daily Digest
Biotech Facts & Fallacies
Genetics Unzipped
Infographic: How dangerous COVID mutant strains develop

Infographic: How dangerous COVID mutant strains develop

Sometime in 2019, probably in China, SARS CoV-2 figured out a way to interact with a specific "spike" on the ...

Philip Njemanze: Leading African anti-GMO activist claims Gates Foundation destroying Nigeria

Nigerian anti-GMO activist, physician, and inventor pushes anti-gay and anti-GMO ...

Most Popular

News on human & agricultural genetics and biotechnology delivered to your inbox.
glp menu logo outlined

Newsletter Subscription

Optional. Mail on special occasions.
Send this to a friend