The effect of the pre-wetting of expanded clay aggregate on the freeze-thaw resistance of the expanded clay aggregate concrete

• Autorzy: Musiał Michał Piotr , Grzymski Filip , Trapko Tomasz

Identyfikatory

DOI

10.2478/sgem-2020-0011

• Języki publikacji: EN

Abstrakty

EN

This paper presents experimental research on expanded clay aggregate concrete. The aim of the investigations was to determine if the pre-wetting of expanded clay aggregate has an effect on the freeze-thaw durability of the expanded clay aggregate concrete. Five concrete series based on the same concrete mix design were made and tested. The degree of pre-wetting of the aggregate was varied: dry aggregate was used in the first series, aggregate with a moisture content of 10% was used in series IA and IB and aggregate with a moisture content of 25% was used in series IIA and IIB. Also the approach to the production process was varied: in series A the water contained in the aggregate was taken into account in the global water-cement ratio (consequently a reduced amount of water was added to the mix), whereas in series B the nominal amount of water was added to the mix (as in the case of dry aggregate). The freeze-thaw resistance criterion was based on the assessment of the decrease of compressive strength and increase in weight loss after exposure to freeze-thaw cycles. The expanded clay aggregate concrete’s strength and mass decrements caused by freeze-thaw cycling were used as the measure of its freeze-thaw resistance. The investigations have shown that the pre-wetting of expanded clay aggregate has an effect on the freeze-thaw durability of the expanded clay aggregate concrete. The differences of concrete compressive strength decrease related to freezethaw durability may be 2 to 5 times greater when inadequate method of calculating mixing water for concrete is used.

Słowa kluczowe

EN

lightweight concrete; freeze-thaw resistance; aggregate pre-wetting

• Wydawca: De Gruyter
• Czasopismo: Studia Geotechnica et Mechanica
• Rocznik: 2021
• Tom: Vol. 43, nr 2
• Strony: 65--73
• Opis fizyczny: Bibliogr. 22 poz., rys., tab.

Twórcy

autor

Musiał Michał Piotr

• Wroclaw University of Science and Technology: Politechnika Wroclawska, Wrocław, Poland

autor

Grzymski Filip

• Wroclaw University of Science and Technology, Politechnika Wroclawska, Wrocław, Poland

autor

Trapko Tomasz

• Wroclaw University of Science and Technology, Politechnika Wroclawska, Wrocław, Poland

Bibliografia

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Uwagi

Bibliografia: podwójna numeracja poz. 21

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2021).