1996
DOI: 10.1680/macr.1996.48.177.265
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Field studies of fly ash concrete structures containing reactive aggregates

Abstract: The paper presents the, findings, from field studies of fly ash concrete structures containing reactive (alkali-silica) aggregates. Data is presented from a number of hydraulic structures in Wales and Ontario constructed using geologically similar greywacke-argillite aggregates. All the structures without ash showed evidence of damage due to ASR: indeed reaction with this aggregate has led to replacement of structures in both areas. Reaction may occur at alkali levels significantly below 3 kg/m3 Na2Oe, and has… Show more

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Cited by 51 publications
(19 citation statements)
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“…In the case of fly ash at a replacement level of 50 mass-% of the binder, aluminum concentration above 1 mmol/l can be reached at ages beyond half a year [35,36]. Fly ash addition has proven to be effective in suppressing ASR in structures on the long term [37].…”
Section: Discussionmentioning
confidence: 99%
“…In the case of fly ash at a replacement level of 50 mass-% of the binder, aluminum concentration above 1 mmol/l can be reached at ages beyond half a year [35,36]. Fly ash addition has proven to be effective in suppressing ASR in structures on the long term [37].…”
Section: Discussionmentioning
confidence: 99%
“…Since the discovery of ASR in concrete in the late 1930s and early 1940s [2], several techniques have been developed and utilized to prevent or minimize the ASR-induced expansion that led to severe distress in concrete structures. Among them, supplementary cementitious materials such as fly ash, meta-kaolin, slag, and silica fume [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17] are regarded as the most effective ones. This study only focuses on fly ash which is the most commonly used additive to mitigate ASR distress.…”
Section: Introductionmentioning
confidence: 99%
“…Typically, Supplementary Cementitious Materials (SCMs) such as fly ashes [1][2][3][4][5], slag [6][7][8], meta-kaolin [9][10][11][12], silica fume [13,14] and other SCMs derived from waste materials such as glass [15][16][17][18][19] have been used successfully to mitigate the ASR distress in concrete. Depletion of alkali loading in concrete mixture due to the replacement of portland cement (dilution effect), better alkali binding provided by modified C-S-H (Calcium-Silicate-Hydrate) gel (particularly, where the calcium to silica ratio are low), higher strength provided by pozzolanic reaction of SCMs and decreasing the rate of silica dissolution from aggregate surface [20] are some of the main causes by which the SCMs can mitigate ASR distress in concrete mixtures.…”
Section: Introductionmentioning
confidence: 99%