List five advantages of precast concrete units.
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What will be an ideal response?
Responses should include any five of the following advantages of using pre-cast concrete units:?Casting takes place in automated facilities where experienced crews produce units under controlled conditions.The control of materials, their mixing, and the placement of the concrete is automated and regularly tested per ASTM standards to produce a higher-quality concrete.A high-strength concrete mix (typically 5,000 psi) is combined with superior strength reinforcing steel.The concrete is mechanically vibrated in the forms and steam cured to speed up production.Units are finished and cured under carefully controlled environmental conditions.Units can be delivered to the job site once they have achieved design strength.Very large pre-cast units can be cast by moving forms to the job and casting on site.Pre-cast units are delivered in a kit of parts that is quickly erected without the need to wait for wet concrete to cure, or building and stripping formwork.Inclement weather does not slow pre-cast construction as easily as it does cast-in-place construction.?
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