ACI 440.4R-04 (R2011) PDF Download

ACI 440.4R-04 (R2011) is a standard that provides valuable information on the use of Fiber-reinforced polymers (FRPs) as an alternative to steel prestressing tendons in concrete structures. It highlights the benefits of FRP materials, such as their high-strength, lightweight nature, as well as their noncorrosive, nonconducting, and nonmagnetic properties.

The document covers the historical background and the current state of design, development, and research in the field of using FRP as prestressing reinforcement in concrete structures. It emphasizes the importance of characterizing and ensuring the performance of FRP materials in these applications.

The guidelines provided in this standard are based on extensive worldwide experimental research, analytical work, and field applications of FRPs as prestressed reinforcement. The topics covered include the behavior of flexure and axial prestressed members, FRP shear reinforcement, bond of FRP tendons, and the use of unbonded or external FRP tendons for prestressing purposes.