Studies of alkali-silica reaction. Part 7. Modelling of expansion
β Scribed by S. Chatterji; P. Christensen
- Publisher
- Elsevier Science
- Year
- 1990
- Tongue
- English
- Weight
- 297 KB
- Volume
- 20
- Category
- Article
- ISSN
- 0008-8846
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β¦ Synopsis
It has been shown that expansion of mortar prisms, due to alkali-silica reaction, can be quantitatively related to their environment, i.e. alkali ion concentration and temperature by an equation of the type
The physical significance of negative signs of dl/dC and dl/dT terms have been discussed. This relation permits a rational choice of aggregates for a given environment.
π SIMILAR VOLUMES
From an extensive petrographic investigation of concrete samples suffering from alkali-silica reaction, it has been hypothesized that a deliberately introduced air-bubble system will reduce expansion due to alkali-silica reaction. The above hypothesis has been tested using mortar bars made from 35 s
Recently a method for the detection of alkali-silica reactivity of sand has been proposed. In this method sand is digested in a mixture of Ca(OH)2 and saturated KCl for 24 hours. The OH ion concentration is determined by titration. The OH ion concentration for a control mixture without sand is deter
In this paper various practical implications of a recently proposed alkali-silica reaction mechanism have been expressed in a coherent fashion. Aspects of alkali-silica reaction considered are: long latency, sources of alkalies, relative aggressivity of sodium and potassium ions, reduction of expans