フレッシュセメントペーストおよびモルタルのレオロジー定数測定

概要

論文の詳細を見る
The authors conduct a series of experiments measuring the resistances met by a sphere in motion at various constant speeds in cement paste and mortar, and calculate their rheological constants. We conclude as follows. 1) The flow curves of cement paste and mortar are generally approximated with Bingham flow. 2) The rheological constants can be calculated by the following equation. [numerical formula] 3) The yield value and plastic viscosity of cement paste are larger, the smaller the water-cement ratio. 4) When the AE agent is added, the yield value and plastic viscosity of cement paste increase. On the other hand, with the addition of AE reducer, the yield value increases, but the plastic viscosity decreases. As a result, it is possible to decrease its apparent viscosity. 5) The yield value and plastic viscosity of mortar are larger, the smaller the water-cement ratio and larger the volume concentration of sand. 6) With the addition of AE agent, the yield value of mortar does not decrease, when the volume of sand in the system is small. AE water reducer also shows similar results. 7) There is a close correlation between the flow test and the yield value. In general, the value of the flow test is smaller, the larger the yield value.
1981-07-30