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Freeze-thaw damage evaluation and model creation for concrete exposed to freeze–thaw cycles at early-age
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, 211189 Nanjing, PR China.ORCID iD: 0000-0003-2668-1329
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering. Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education, School of Civil Engineering, Southeast University, 211189 Nanjing, PR China; National Engineering Research Center for Prestressing Technology, Southeast University, 211189 Nanjing, PR China.ORCID iD: 0000-0002-8372-1967
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering. SINTEF Narvik AS, Narvik 8517, Norway.ORCID iD: 0000-0002-8682-876x
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Structural and Fire Engineering.ORCID iD: 0000-0002-0560-9355
2021 (English)In: Construction and Building Materials, ISSN 0950-0618, E-ISSN 1879-0526, Vol. 312, article id 125352Article in journal (Refereed) Published
Abstract [en]

Concrete subjected to freeze–thaw cycles action at early-age will suffer serious physical damage, resulting in degradation of the concrete’s performance. The subsequent curing conditions after early-age freeze–thaw cycles (E-FTCs) are critical to the development of the properties of frost-damaged concrete. Four test environments were set up for this study, based on different numbers of E-FTCs and subsequent curing conditions. The later-age resistance to freeze–thaw of concrete exposed to E-FTCs was evaluated by analysing the influence of pre-curing times and curing conditions. Results show that the earlier the FTCs occur, the worse the later-age freeze–thaw resistance is. In particular, for the frost-damaged concrete with a pre-curing time of 18 h, its freeze–thaw resistance is significantly worse than that of other concretes that have a longer pre-curing time. The increase in the number of E-FTCs exacerbates the damage to early-age concrete, which causes the reduced later-age freeze–thaw resistance. Subsequent water curing can significantly improve the freeze–thaw resistance of damaged concrete, while air curing is the least effective. Based on previous freeze–thaw damage models, prediction models for concrete exposed to E-FTCs were created by using the test data obtained in this study. The critical pre-curing strengths which can ensure that the damaged concrete has satisfactory frost resistance at later-age were thus obtained. For concrete structures expected to experience E-FTCs, adequate pre-curing strength and good re-curing conditions are essential.

Place, publisher, year, edition, pages
Elsevier, 2021. Vol. 312, article id 125352
Keywords [en]
Early-age freeze–thaw cycles, Pre-curing time, Subsequent curing, Freeze–thaw resistance, Prediction model, Critical pre-curing strength
National Category
Infrastructure Engineering
Research subject
Structural Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-87819DOI: 10.1016/j.conbuildmat.2021.125352ISI: 000718520000006Scopus ID: 2-s2.0-85118511491OAI: oai:DiVA.org:ltu-87819DiVA, id: diva2:1609290
Note

Validerad;2021;Nivå 2;2021-11-08 (johcin);

Funder: National Natural Science Foundation of China (51378104)

Available from: 2021-11-08 Created: 2021-11-08 Last updated: 2025-01-14Bibliographically approved

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Liu, DongyunTu, YongmingSas, GabrielElfgren, Lennart

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