FILLER CEMENT - THE EFFECT OF THE SECONDARY COMPONENT ON THE HYDRATION OF PORTLAND-CEMENT .1. A FINE NONHYDRAULIC FILLER

Two series of pastes were prepared having a water to solids ratio of 0.71. The first contained an ordinary Portland cement and the second contained the same cement blended with Rutile (a fine, non-hydraulic filler). The presence of the fine powder is shown to enhance the degree of hydration of the major cement phases at ages beyond seven hours. The enhancement was accompanied by an increase (pro-rata) in the quantities of bound water and Portlandite. Both quantities were found to be related to the degree of hydration of the Portland cement so that empirical relationships could be established. It is shown that the fine non-hydraulic filler had a variable cement equivalence which reached a maximum of 0.9 kg/kg. © 1990.