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113. Effect of mineral additions on prevention of alkali silica reaction in SCC - Effect of mix design on damage



Title: 113. Effect of mineral additions on prevention of alkali silica reaction in SCC - Effect of mix design on damage
Author(s): K. Schmidt, G. Grundmann, D. Heinz
Paper category : conference
Book title: 5th International RILEM Symposium on Self-Compacting Concrete
Editor(s): G. De Schutter and V. Boel
Print-ISBN: 978-2-35158-047-9
e-ISBN: 978-2-35158-088-2
Publisher: RILEM Publications SARL
Publication year: 2007
Pages: 753 - 760
Total Pages: 8
Nb references: 4
Language: English


Abstract: The effect of fly ash and ground limestone on the damaging alkali silica reaction (ASR) in self-compacting concrete (SCC) with greywacke and crushed gravel from the upper Rhine rift was investigated. Expansion and crack formation due to ASR were observed during accelerated concrete testing in a fog chamber at 40°C over a period of 18 months. It was found that for SCC containing greywacke ASR damage was prevented by using fly ash, but not with ground limestone. By contrast, SCC containing crushed gravel from the upper Rhine rift showed no signs of damage - even with ground limestone. It was possible to explain this behaviour by comparison with results for concrete of normal mix design. In general, it was found that higher strength concrete has different damage characteristics compared to lower strength concrete. This was attributed to the higher strength of the microstructure and denser matrix of concrete at higher strengths.


Online publication: 2009-06-16
Publication type : full_text
Public price (Euros): 0.00


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