关键词: 硅微粉;水化热;紧密堆积理论;屈服应力;塑性粘度

Abstract: Hydration heat calorimeter , rheometer and Dinger-Funk dense packing were employed to study the rheological properties of cement-silicon powder compound pastes .The influences of the proportion of silicon powder on the early hydration rate , dense packing , yield stress and plastic viscosity of the compound pastes were researched .The results reveal that the replacement of cement with silicon powder reduces the early hydration heat and increases the dense packing of compound pastes .Compound pastes with cement-silicon powder still belongs to the Bingham fluid , compound pastes with 5%,10%,15%mass fraction of silicon powder are less than pure cement paste on yield stress and plastic viscosity in the time of 0 and 60 min.And compound pastes with 10% mass fraction of silicon powder which are minimum on yield stress and plastic viscosity both in 0, 60 min, have the best rheological properties .

Key words: silicon powder;hydration heat;theory of dense packing;yield stress;plastic viscosity