What effect can improper rebar placement have on a concrete structure?

Improper rebar placement can significantly compromise the integrity of a concrete structure, leading to structural failure. Reinforcing steel bars (rebar) are essential for providing tensile strength and improving the overall load-bearing capacity of concrete, which is inherently strong in compression but weak in tension. When rebar is not placed according to design specifications, it can result in inadequate support for the loads the structure must bear.

For instance, if rebar is misplaced or insufficiently spaced, cracks may form under stress, which can progress to significant structural damage over time. Additionally, improper placement can affect how the concrete cures, potentially leading to issues such as spalling or even collapse in extreme cases. Therefore, ensuring the correct placement of rebar is critical for maintaining the safety and longevity of concrete structures.