In-situ or Cast-in-Place concrete is the concrete usage that forms on-site and is poured directly into those forms. The concrete can either be transported, already mixed in large mixing trucks, or it can be mixed on site and poured into pre-set forms.
Precast Concrete, on the other hand, refers to any piece of concrete that is cast at a different location from the final building site and the cured (hardened) piece is transported to site when the site is ready for delivery, whether it is prestressed or reinforced with conventional reinforcement bar.
To determine which technique to use for your project, you need to first know what the difference between the two and what pros and cons each of them have to offer.
Here we have some major differences between the two techniques. As effective as each of them are, both the techniques have their own plus points and drawbacks and for any project, you need to lay these points down and determine what will work best for the project in hand. For example, cast-in-place concrete is highly governed by the weather. If the conditions are not ideal, the project can take double the time plus, can even jeopardize the quality and the durability of the structure.
Similarly, because in precast the panel size is limited, precast concrete cannot be used for two-way structural systems, plus dues to economies of scale, you can produce only regularly shaped buildings.
Nevertheless, both techniques are highly effective and widely used by major project owners. The key to success, regardless of whether you are doing a Cast-in-place or Precast concrete pour, is to streamline the entire workflow from bidding to delivery. Utilizing the right technology and planning ahead, can save you huge amounts of time and money. Using a 3D modeling or a BIM software for your project, for example, can immensely minimize costly surprises and wastage, improve the overall efficiency and quality of the end product, and most importantly, ensure that error-free elements are delivered in the right place at the right time!