Rheological Properties of Self-Consolidating Concrete at Freezing Temperatures скачать в хорошем качестве

Rheological Properties of Self-Consolidating Concrete at Freezing Temperatures

Presented By: Aljhon Morana, Rowan University Frost protection for cold-weather concrete often involves energy-intensive heating methods, leading to greater CO2 emissions. This study develops a cold-weather self-consolidating concrete (CWSCC) that endures temperatures reaching -5°C without external heating. CWSCC uses an additive-based frost protection system comprising an accelerator and corrosion inhibitor for hastened hydration and freezing point reduction. The study explores the use of SCMs, hydration stabilizer, and limestone powder. Comparative analyses are employed on fresh properties, yield stress, viscosity, and thixotropy. Results indicate that rheological properties determine its flow behavior. It also indicates additional mixing energy to achieve optimum dispersion. The mixtures also maintain flowability, passing ability, and segregation resistance requirements within 60 min after mixing. Future work will involve using viscosity-modifying admixtures and hydration kinetics using isothermal calorimetry results.