Is post-tensioning commonly used for small, easily transported concrete sections?

• A. True
• B. False
• C. Only in special cases
• D. Only for precast elements

Answer: (B)

Post-tensioning is a technique primarily used in larger concrete structures that require enhanced strength and durability, such as bridges, parking garages, and high-rise buildings. The method involves placing high-strength steel tendons in ducts within the concrete and then tensioning them after the concrete has hardened, allowing for better control of cracking and reducing tensile stresses.

For small, easily transported concrete sections, the application of post-tensioning is generally not practical. These smaller components typically do not require the same level of structural reinforcement that post-tensioning provides. Instead, conventional reinforcement methods, like rebar, suffice for ensuring structural integrity. Moreover, the logistical aspects of setting up and executing post-tensioning can be cumbersome for smaller elements, making it an inefficient choice for them. Hence, the assertion that post-tensioning is commonly used for small, easily transported concrete sections is false.