Exploring Concrete Rheology
This report presents an investigation of the flow behavior of mixtures with low water-cement ratios using a rheometer equipped with a high-pressure unit. The study focuses on shear rate-dependent flow curves measured at various pressure conditions ranging from atmospheric pressure to 150 bar.
Modern civil engineering requires concrete materials with enhanced strength, durability and reliability to meet the demands of advanced construction practices. Low water-cement concrete (with a water-cement ratio of less than 0.2) has emerged as a critical development in high-performance concrete, as reducing water content significantly improves the strength and durability of the final product. However, these advances come with challenges: the reduced water content increases the viscosity of the concrete slurry, resulting in thickening properties that complicate mixing, pumping and placing.
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