Effect of Admixtures on the Yield Stresses of Cement Pastes under High Hydrostatic Pressures

摘要: When cement-based materials are transported at a construction site, they undergo high pressures during the pumping process. The rheological properties of under such unknown, and estimating workability after is complex problem. Among various influential factors on rheology concrete, this study investigated effect mineral chemical admixtures high-pressure rheology. A rheometer was fabricated that could measure while maintaining pressure to simulate effects superplasticizer, silica fume, nanoclay, fly ash, or ground granulated blast furnace slag were when mixed with two control cement pastes. water-to-cement ratios 0.35 0.50.