Precast concrete

Precast concrete is a construction product produced by casting <a href="/facts/Concrete/K6whGVNx">concrete</a> in a reusable <a href="/facts/Molding_(process)/1GkAeyCx">mold</a> or "form" which is then cured in a controlled environment, transported to the construction site and maneuvered into place; examples include precast <a href="/facts/Beam_(structure)/V9BPDeS8">beams</a>, and wall panels, floors, roofs, and piles. In contrast, <a href="/facts/Cast-in-place_concrete/15Uue620">cast-in-place concrete</a> is poured into site-specific forms and cured on site.
Recently lightweight <a href="/facts/Expanded_polystyrene/dfIVntty">expanded polystyrene</a> foam is being used as the cores of precast wall panels, saving weight and increasing <a href="/facts/Thermal_insulation/j7tVT4uv">thermal insulation</a>.
Precast stone is distinguished from precast concrete by the finer <a href="/facts/Construction_aggregate/K7XM0BAg">aggregate</a> used in the mixture, so the result approaches the natural product.

Precast concrete open-in-new

Precast concrete