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Enhancing The Freeze-thaw Durability of Concrete through Ice Recrystallization Inhibition by Poly(vinyl alcohol).docx (1.54 MB)
Enhancing the Freeze-Thaw Durability of Concrete Through Ice Recrystallization Inhibition by Poly(vinyl Alcohol)
Preprints are manuscripts made publicly available before they have been submitted for formal peer review and publication. They might contain new research findings or data. Preprints can be a draft or final version of an author's research but must not have been accepted for publication at the time of submission.
submitted on 13.12.2019 and posted on 19.12.2019by 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.