What is the primary function of welded wire reinforcement in slabs-on-ground that are considered unreinforced?

What is the primary function of welded wire reinforcement in slabs-on-ground that are considered unreinforced?

• A. Keeping Cracks Tightly Closed
• B. Increasing Strength
• C. Speeding Curing
• D. Reducing Shrinkage

Answer: (A)

Crack control is the focus. Welded wire reinforcement in slabs-on-ground treated as unreinforced isn’t about adding structural strength; it’s about restraining cracking so any cracks that form stay narrow and closed. As concrete dries and undergoes temperature changes, it tends to crack, and wide cracks can lead to durability issues and visible damage. The wire mesh distributes tensile stresses and keeps crack faces pressed together, which improves serviceability and keeps the surface more intact. It doesn’t speed up curing, and it doesn’t significantly boost the slab’s overall bending strength in the way traditional reinforcing would. It also doesn’t reduce the rate of shrinkage itself—the shrinkage comes from the concrete mix and moisture loss—but it minimizes the width of cracks that shrinkage can cause.

Crack control is the focus. Welded wire reinforcement in slabs-on-ground treated as unreinforced isn’t about adding structural strength; it’s about restraining cracking so any cracks that form stay narrow and closed. As concrete dries and undergoes temperature changes, it tends to crack, and wide cracks can lead to durability issues and visible damage. The wire mesh distributes tensile stresses and keeps crack faces pressed together, which improves serviceability and keeps the surface more intact.

It doesn’t speed up curing, and it doesn’t significantly boost the slab’s overall bending strength in the way traditional reinforcing would. It also doesn’t reduce the rate of shrinkage itself—the shrinkage comes from the concrete mix and moisture loss—but it minimizes the width of cracks that shrinkage can cause.