Florida Department of Transportation ResearchrnSimulation of Prepackaged Grout Bleed under Field ConditionsrnBDK75-977-59

摘要

Post-tensioning (PT) is a method of compensating for concrete’s weakness under tension by adding steel. Tubes (ducts) are cast into concrete components; after the concrete sets, high-strength steel cables (tendons or strand) are run through the ducts, secured at both ends, and tensioned by powerful jacks. The ducts are then filled with PT grout, which hardens, preventing corrosion and bonding the cables to the concrete