Rheological properties of cementitious materials containing mineral admixtures |
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Authors: | CK Park TH Park |
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Affiliation: | a Korea Institute of Industrial Technology, Cheonan 330-825, Korea b Department of Civil Engineering, Hanyang Uninversity, Seoul 133-791, Korea |
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Abstract: | The rheological properties of cementitious materials containing fine particles, such as mineral admixtures (MA), were investigated using a Rotovisco RT 20 rheometer (Haake) with a cylindrical spindle. The mineral admixtures were finely ground blast furnace slag, fly ash and silica fume. The cementitious materials were designed as one, two and three components systems by replacement of ordinary portland cement (OPC) with these mineral admixtures. The rheological properties of one-component system (OPC) were improved with increasing the dosage of PNS-based superplasticizer. For two-components systems, yield stress and plastic viscosity decreased with replacing OPC with blast furnace slag (BFS) and fly ash (FA). In the case of OPC-silica fume (SF) system, yield stress and plastic viscosity steeply increased with increasing SF. For three components systems, both OPC-BFS-SF and OPC-FA-SF systems, the rheological properties improved, compared with the sample with SF. In the two and three components systems, the rheological properties of samples containing BFS improved much more than with FA replacement alone. |
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Keywords: | Rheology Workability Granulated blast-furnace slag Filler Pozzolan |
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