The influence of silica fume,slag and fly ash on alkali-silica reaction under the condition of 70℃ is studied.The results show that silica,slag and fly ash may inhibit alkali-silica reaction only under suitable content.When the content is less than 10%,silica fume does not markedly influence the expansion of alkali-silica reaction.When the content is 15%-20%,silica fume only may delay the expansion of alkali-silica reaction.When the content is 30%-70%,slag may only delay the expansion of alkali-silica reaction,but cannot inhibit the expansion of alkali-silica reaction.When the content is 10%,fly ash does not markedly influence the expansion of alkali-silica reaction.When the content is 20%-30%,fly ash may only delay the expansion of alkali-silica reaction,but cannot inhibit the expansion of alkali-silica reaction.When the content is over 50%,it is possible that fly ash can inhibit effectively alkali-silica reaction.
参考文献
| [1] | D W Hobbs.Alkali-Silica Reaction in Concrete[M].London:Thomas Telford Ltd,1988:183. |
| [2] | ASTM C441.ASTM C441.Standard Test Method for Effectiveness of Mineral Admixtures in Preventing Excessive Expansion of Concrete due to the Alkali-Aggregate Reaction[S].,1981. |
| [3] | D W Hobbs .Deleterious Expansion of Concrete due to Alkali-Silica Reaction:Influence of Fly Ash and Slag[J].Magazine of Concrete Research,1986,38(137):191-205. |
| [4] | Hobbs D W.Effect of Mineral and Chemical Admixtureon Alkali-Aggregate Reaction[A].Kyoto,Japan,1989:173-186. |
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