Aging of alkali-resistant glass and basalt fibers in alkaline solutions: Evaluation of the failure stress by Weibull distribution function

In alkaline solutions, the reaction of hydroxyl ions with Si–O–Si-groups of the glass network leads to the formation of hydrated surfaces and dissolved silicate. The rate of this corrosion depends on the chemical constitution of the fiber and the alkaline solution as well as on time and temperature....

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Bibliographic Details
Published inJournal of non-crystalline solids Vol. 355; no. 52; pp. 2588 - 2595
Main Authors Scheffler, C., Förster, T., Mäder, E., Heinrich, G., Hempel, S., Mechtcherine, V.
Format Journal Article
LanguageEnglish
Published Oxford Elsevier B.V 15.12.2009
Elsevier
Subjects
Applied sciences
Building materials. Ceramics. Glasses
Chemical durability
Chemical industry and chemicals
Corrosion
Defects
Exact sciences and technology
Fracture
Glasses
Nanoparticles
Oxide glasses
Scanning electron microscopy
Strength
Structure, analysis, properties
81.05.Kf
Nanoparticles
Scanning electron microscopy
Corrosion
Fracture
Oxide glasses
Chemical durability
81.65.Kn
Strength
Defects
Corrosion mechanism
Basic solution
Ageing
Rupture
Durability
Stress distribution
Distribution function
Glass fiber
Weibull distribution
Basalts
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Summary:In alkaline solutions, the reaction of hydroxyl ions with Si–O–Si-groups of the glass network leads to the formation of hydrated surfaces and dissolved silicate. The rate of this corrosion depends on the chemical constitution of the fiber and the alkaline solution as well as on time and temperature. The investigation of the aging of glass and basalt fibers with different chemical constitutions in NaOH and cement solutions shows that the corrosion mechanism changes due to the inhibiting effect of calcium ions. The strength distributions have been evaluated using a Weibull distribution function. The mechanical behavior strongly depends on the chemistry of the solution and determines the parameters of the Weibull distribution function in terms of either single or mixed distributions. The corrosion in NaOH solution leads to a strong dissolution of the outer layer of the glass and basalt fibers, whereas during aging in cement solution at the same pH-value a limited, local attack was revealed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3093
1873-4812
DOI:10.1016/j.jnoncrysol.2009.09.018