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Drying induced moisture losses from mortar to the environment. part I: experimental research

Title
Drying induced moisture losses from mortar to the environment. part I: experimental research
Type
Article in International Scientific Journal
Year
2007
Authors
Azenha, M
(Author)
FEUP
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Maekawa, K
(Author)
Other
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Ishida, T
(Author)
Other
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Journal
Vol. 40
Pages: 801-811
ISSN: 1359-5997
Publisher: Springer Nature
Indexing
Scientific classification
FOS: Engineering and technology > Civil engineering
CORDIS: Technological sciences > Engineering > Civil engineering
Other information
Authenticus ID: P-004-792
Abstract (EN): Moisture conditions in the pore structure of hardening cementitious materials are known to have determinant influence on the onset and continuance of hydration reactions. Moisture loss from regions near exposed surfaces may jeopardize the quality of concrete cover in terms of both mechanical and durability issues. In addition, drying shrinkage, a phenomenon directly related to a moisture loss to the environment, is known to be responsible for several surface cracks that impair durability performance and pose aesthetical problems. Furthermore, evaporative cooling that occurs in concrete surfaces in the first minutes just after form work removal may cause thermal cracking. For the above mentioned reasons, it is important to assess the mechanisms of moisture losses from cement-based materials to the environment, in order to rationally establish curing criteria. This paper describes an experimental campaign conducted with the purpose of better understanding the effect of various environmental conditions on the referred moisture interactions, accounting for influences such as the environmental temperature, the relative humidity (RH), the wind speed and direction, as well as the duration of curing. Numerical simulations with comparisons against test data, as well as some sensitivity analyses, are relegated to the companion paper that follows in this issue.
Language: English
Type (Professor's evaluation): Scientific
Contact: mazenha@fe.up.pt
No. of pages: 11
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