Tilt slab construction uses which type of concrete?

• A. Cast-in-place concrete
• B. Precast concrete
• C. Reinforced concrete
• D. Autoclaved aerated concrete

Answer: (B)

Tilt slab construction relies on precast concrete panels. In this method, wall elements are cast as separate units on a temporary bed (either on site or nearby) and then raised into place with a crane. Because the panels are fabricated away from their final vertical position and later installed, they’re considered precast rather than poured in their final position on the building. This approach speeds up erection and reduces on-site formwork. Cast-in-place would mean pouring the walls directly where they stand, which isn’t how tilt-slab walls are typically constructed. Reinforced concrete describes a material property (the steel within the concrete) rather than the construction approach, and autoclaved aerated concrete is a different material system altogether.