This paper reports on CANMET s development of high volume fly ash -HVFA- blended cements and their performance in concrete. The blended cements are made by intergrinding approximately 55% of fly ash and 45% of ASTM Type I or Type III cement clinker together with small amounts of gypsum and a dry superplasticizer. The concrete made with the HVFA blended cements has adequate early-age and excellent later-age mechanical properties and demonstrates satisfactory performance in durability aspects such as resistance to freezing and thawing cycling and chloride ion penetration.

Technical Report Author: Nabil Bouzoubaa, M.H. Zhang, V.M. Malhotra, CANMET Energy Technology Centre, Natural Resources Canada,