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Enhancing The Freeze-thaw Durability of Concrete through Ice Recrystallization Inhibition by Poly(vinyl alcohol).docx (1.54 MB)
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Enhancing the Freeze-Thaw Durability of Concrete Through Ice Recrystallization Inhibition by Poly(vinyl Alcohol)

preprint
submitted on 13.12.2019 and posted on 19.12.2019 by Zhengyao Qu, Shuaiqi Guo, Christian C. M. Sproncken, Romà Surís-Valls, qingliang yu, Ilja Voets
Frost weathering of porous materials caused by seasonal temperature changes is a major source of damage to the world’s infrastructure and cultural heritage. Here we investigate poly(vinyl alcohol) (PVA) addition as a means to enhance the freeze-thaw durability of concrete without compromising its structural or mechanical integrity. We evaluate the ice recrystallization inhibition activity of PVA in a cementitious environment and the impact of PVA on key structural and mechanical properties, such as cement hydration (products), microstructure, strength, as well as freeze‑thaw resistance. We find that a low amount of PVA significantly reduces the surface scaling of concrete and displays excellent ice recrystallization inhibition in the saturated Ca(OH)2 solution which has a similar pH value as cement pore solution, while it does not affect cement hydration, microstructure, nor its mechanical properties. These findings contribute to new insights on freeze-thaw damage mechanism and more importantly we disclose a new direction for the design of concrete with excellent freeze‑thaw resistance.

History

Email Address of Submitting Author

I.Voets@tue.nl

Institution

Eindhoven University

Country

Netherlands

ORCID For Submitting Author

0000-0003-3543-4821

Declaration of Conflict of Interest

The authors declare no competing interests.

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