Ползучесть высокопрочного бетона при повышенных температурах
Автор: Баранов А.О., Страхов Д.А.
Журнал: Строительство уникальных зданий и сооружений @unistroy
Статья в выпуске: 2 (106), 2023 года.
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Объект исследования – высокопрочный бетон, содержащий микрокремнезем, золу-унос и суперпластификатор. Целью данной работы является получение экспериментальных данных по деформации ползучести высокопрочного бетона при повышенных температурах и разработка выражения для описания деформации ползучести (удельной деформации ползучести) высокопрочного бетона при повышенных температурах. Метод. Ползучесть высокопрочного бетона при повышенных температурах изучали на невысыхающих образцах. Образцы высокопрочного бетона в возрасте 90 суток нагревали со скоростью 10-15°С/час до температур 90 и 200°С, а затем нагружали постоянной нагрузкой, равной 30 % прочности на сжатие испытуемых образцов. определяется в возрасте 28 дней. Полученные результаты. Экспериментальные исследования подтвердили выводы других авторов о том, что деформация ползучести увеличивается с увеличением температуры нагрева. Деформация ползучести при температурах 90 и 200°С к концу рассматриваемого времени была в 3,6 и 4 раза выше деформации ползучести при нормальной температуре 20°С.
Высокопрочный бетон, температура, ползучесть, удельная деформация ползучести, зольная пыль, микрокремнезем
Короткий адрес: https://sciup.org/143180500
IDR: 143180500 | DOI: 10.4123/CUBS.107.4
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