ALKALI-SILICA REACTIVITY TEST FOR CLASS C AND CLASS F FLY ASH-CEMENT MIXTURES USING MODIFIED ASTM C 1260 METHOD
Abstract eng: The effectiveness of Class C and Class F fly ash in controlling expansion due to alkali silica reactivity (ASR) was investigated based on modified ASTM C 1260 method. Three different levels of alkalinity of NaOH solution (1N, 0.5N, and 0.25N) were used to test the reactivity of reactive and potentially reactive aggregate in the presence of 20 and 35 percent Class C and F fly ash replacement by mass of cement. The other variables included high- and low alkali cement, extended curing time, and longer testing period of 28 days. Test results confirm that Class F fly ash is more effective than Class C fly ash in controlling expansion due to ASR, but Class C fly ash can also be used under certain conditions.
Contributors:
Publisher:
Columbia University in the City of New York
Conference Title:
Conference Title:
15th ASCE Engineering Mechanics Division Conference
Conference Venue:
New York (US)
Conference Dates:
2002-06-02 / 2002-06-05
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2014-11-19, last modified 2014-11-19
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