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Durability and testing – Degradation via mass transport

AuthorsBernal, Susan A.; Bílek, Vlastimil; Criado, María ; Fernández-Jiménez, Ana; Kavalerova, Elena; Krivenko, Pavel V.; Palacios, Marta; Palomo, Ángel; Provis, John L.; Puertas, Francisca; San Nicolas, Rackel; Shi, Caijun; Winnefeld, Frank
KeywordsInterfacial transition zone
Mercury intrusion porosimetry
Pore solution
Portland cement
Chloride penetration
Issue Date2014
CitationAlkali Activated Materials: 223- 276 (2014)
SeriesRILEM State-of-the-Art Reports
AbstractIn most applications of reinforced concrete, the predominant modes of structural failure of the material are actually related more to degradation of the embedded steel reinforcing rather than of the binder itself. Thus, a key role played by any structural concrete is the provision of sufficient cover depth, and alkalinity, to hold the steel in a passive state for an extended period of time. The loss of passivation usually takes place due to the ingress of aggressive species such as chloride, and/or the loss of alkalinity by processes such as carbonation. This means that the mass transport properties of the hardened binder material are essential in determining the durability of concrete, and thus the analysis and testing of the transport-related properties of alkali-activated materials will be the focus of this chapter. Sections dedicated to steel corrosion chemistry within alkali-activated binders, and to efflorescence (which is a phenomenon observed in the case of excessive alkali mobility), are also incorporated into the discussion due to their close connections to transport properties.
Publisher version (URL)https://doi.org/10.1007/978-94-007-7672-2_9
Appears in Collections:(IETCC) Libros y partes de libros
(ICMM) Libros y partes de libros
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