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Additional info for The Alkali-silica reaction in concrete
And Matsushita, H. (1986) A rapid method for determining the alkali-aggregate reaction in concrete by autoclave. Proceedings of the Seventh International Conference on Concrete Alkali-Aggregate Reactions, pp. 299–303. 1 Introduction The knowledge that some mineral aggregates are reactive with cement is not new. Indeed, this is the reason why many natural pozzolans can be activated by cement or lime. However, while many reactions occurring internally in cemented systems have beneficial consequences, or at least have no significant adverse effects, the alkali-aggregate reaction does give cause for concern.
5. The diagram illustrates the simplest case where the reaction rate and expansion are being controlled by the ratio of alkali to silica or silica to alkali, both reactant concentrations being equally important for the reaction. Pessimum proportions obviously do not and need not occur at the 50% level. If a reactive aggregate has a higher rate of removal of alkalis than the simple case illustrated, each unit increase in reactive constituent will remove a larger proportion of the starting concentration of alkali.
Cement and Concrete Association, Wexham Springs, Slough, UK. 8 . Diamond, S. ) (1978) Proceedings of the Fourth International Conference on the Effects of Alkalis in Cement and Concrete. Publication No. CE-MAT-1–78. Lafayette, USA. 9 . E. ) (1981) Proceedings of the Fifth International Conference on Alkali-Aggregate Reaction in Concrete. National Building Research Institute of the Council for Scientific and Industrial Research, Pretoria, South Africa. 10. M. and Rostam, S. ) (1983) Proceedings of the Sixth International Conference on Alkalis in Concrete, Research and Practice.