What are the typical types of reinforcement used in concrete?

Steel rebar is widely recognized as one of the primary forms of reinforcement used in concrete structures. It is made of steel and has a high tensile strength, which is critical for improving the ductility and load-bearing capacity of concrete, given that concrete is strong in compression but weak in tension. By incorporating steel rebar into concrete, it mitigates cracks and prevents failure under tension stress, thereby enhancing the overall durability and structural integrity of the concrete member.

While other options presented may have specific uses in certain applications—like synthetic fibers that help control shrinkage or plastic mesh that can be beneficial in non-structural applications—the industry standard for effective reinforcement remains steel rebar due to its proven performance and wide acceptance in various types of concrete construction.