Blended cements in North America — A review

Abstract This paper traces the history of the use of blended cements in Canada and the USA and describes briefly the various supplementary cementing materials which have been, and are being, used to produce blended cements. A rationale is given as to why the blended cements in North America constitute only a very insignificant amount of the total cement production. Reference is made to the current ASTM and CSA standards on the subject and the properties of blended silica fume cements being produced in Canada are discussed. Also, the blended cements made with controlled particle-size distribution, which are still in the development stage, are described briefly.