Estimation of the Probability of Cracking of Facade Coatings

Abstract:

Information on the stress state of protective and decorative coatings during the curing process, in particular on the cohesive state of destruction, is given. The influence of the type of substrate on the change in internal stresses in the coating is considered. It was revealed that the greatest value of shear stresses is observed in coatings on a heavyweight concrete substrate. The subsequent increase in temperature after curing to 50°C leads to an increase in the value of the normal stresses. The probability of cracking of coatings during thermal aging is estimated. It was revealed that during aging there is an exponential decrease in the cohesive strength of coatings and an increase in internal stresses. Aging tends to increase the likelihood of cracking of coatings. The change in stresses in coatings as a result of seasonal fluctuations in air temperature is considered.

• Periodical: Materials Science Forum (Volume 1037)
• Pages: 675-683
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1037.675
• Online since: July 2021
• Authors: Valentina Loganina, Roman Fediuk*, Daniil Taranov, Y.H. Mugahed Amran
• Keywords: Aging, Coatings, Crack Resistance, Stress, Substrate

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