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ASR Resistance of Ternary Cementitious Systems Containing Silica Fume-Fly Ash Using Modified ASTM C 1260 Method
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 Title & Authors
ASR Resistance of Ternary Cementitious Systems Containing Silica Fume-Fly Ash Using Modified ASTM C 1260 Method
Shon, Chang-Seon; Kim, Young-Su; Jeong, Jae-Dong;
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 Abstract
Supplementary cementitious materials (SCM) such as fly ash, ground granulated blast furnace slag and silica fume are now being extensively used in concrete to control expansion due to alkali-silica reactivity (ASR). However, the replacement level of a single SCM needed to deleterious ASR expansion and cracking may create other problem and concerns. For example, incorporating silica fume at levels greater than 10% by mass of cement may lead to dispersion and workability concerns, while fly ash can lead to poor strength development at early age, The combination of silica fume and fly ash in ternary cementitious system may alleviate this and other concerns, and result in a number of synergistic effects. The aim of the study was to enable evaluation of more realistic suitability of a silica fume-fly ash combination system for ASR resistance based on an in-house modification of ASTM C 1260 test method. The modification can be more closely identified with actual field conditions. In this study three different strengths of NaOH test solution(1N, 0.5N, and 0.25N) were used to measure the expansion characteristics of mortar bar made with a reactive aggregate. The other variable included longer testing period of 28 days instead of a conventional 14 days.
 Keywords
alkali-silica reactivity;modified ASTM C 1260 test method;silica fume;fly ash;normality of NaOH solution;
 Language
English
 Cited by
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ASR Products on the Content of Reactive Aggregate,;;

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Mechanical properties and adiabatic temperature rise of low heat concrete using ternary blended cement, Computers and Concrete, 2016, 17, 2, 271  crossref(new windwow)
2.
Statistical mixture design of ternary blends for controlling ASR, Magazine of Concrete Research, 2015, 67, 2, 63  crossref(new windwow)
3.
Effectiveness of Ternary Blends in Mitigating ASR Demonstrated on the Modified Mortar-Bar Test, Journal of Testing and Evaluation, 2017, 45, 3, 20150263  crossref(new windwow)
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