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The reasons of peeling of a protective polymeric covering of concrete with the strengthened top layer

UDK: 693.556/.558

V.A. Shamanov - Perm National Research Polytechnic University, Perm, Russian Federation;

The possible reasons of peeling of a protective polymeric covering of concrete with the strengthened top are described. Presumably, abnormal conditions of curing of concrete and a top-layer, or high content of alkalis on a top ping surface during an initial stage of his curing can be the reasons of peeling of a protective polymeric covering. For establishment of the reasons of peeling of a protective polymeric covering influence of conditions and time of curing of the strengthening concrete layer (top-layer) for tendency to peeling of a protective polymeric covering has been studied. During the experiments it is established that peeling of a protective polymeric covering isn't connected with abnormal conditions of curing: peeling of a protective polymeric covering was observed at the sample with a “green” top-layer hardening later drawings a covering in normal temperature and moist conditions. At the same time, peeling of a protective polymeric covering comes from the strengthened layer (to-layer) in the first 2-3 hours from the moment of a add-water that corresponds to the period of the greatest release of hydroxide of calcium from cement system up to the end of process of loss of mobility of a cement. Recommendations about performance of work about the device of a protective polymeric covering of a top-layer are offered no earlier than in 4 hours from the moment of his topping.

Файл: В.А. Шаманов.pdf, 7 pag.

Рубрика: Строительные материалы и технологии их производства
Выпуск №9: По материалам IX Всероссийской молодежной конференции аспирантов, молодых ученых и студентов «СОВРЕМЕННЫЕ ТЕХНОЛОГИИ В СТРОИТЕЛЬСТВЕ. ТЕОРИЯ И ПРАКТИКА», (Часть II ,октябрь, 2017)


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