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The review paper produced by Drs. Santhanam, Cohen, and Olek [Cem. Concr. Res. 31 (2001) 845.] is a thoughtful attempt to look at the current sulphate attack situation from the North American viewpoint. The review gives suggestions about what needs to be done to obtain more information about precisely how sulphate attack takes place in different situations. Also discussed is how test procedures may need to be modified to give data that are more representative of field situations, and the need for better modelling systems for sulphate attack. However, there are numerous points concerning the current situation that also need to be addressed in order to ascertain more clearly exactly what is taking place. These are discussed briefly below.  相似文献   

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