Deleterious expansion of concrete due to alkali-silica reaction: influence of pfa and slag

The literature dealing with the effectiveness of partial replacement of a high-alkali cement by pulverized-fuel ash (pfa) and ground granulated blast furnace slag (slag) in preventing deleterious expansion due to the alkali–silica reaction (ASR) when a reactive aggregate is used is reviewed, and results are reported of recent tests carried out on concrete at C&CA. It is shown that the effectiveness of pfa's and slags in preventing deleterious expansion due to ASR varies widely and that the use of some pfa's and slags may not reduce the risk of deleterious expansion.