What is precast?
Precast concrete is the concrete product which has been formed, poured and cured in a controlled environment and then shipped to its installation place. In contrast the normal concrete is formed in place, poured and cured. The advantages of precast in in many aspects
- More precise forming: The forms manufactured in the shop for precast concrete products are better setup and better assembled. This gives the dimensions and shape more accuracy.
- Reusable forms: The same form can be used several times. Hence the cost of on form can be divided to number of final products.
- More controlled concrete pouring: The pouring and vibrating the concrete in the shop is usually more accurate. The mix design of precast concrete is more delicate, and timing is more accurate.
- Better curing process: The curing in a controlled temperature give better quality to precast concrete hence the durability improves, and final product is more reliable.
The disadvantage of precast is that the final product needs to be shipped to the site which in case of heavy and bulky precast pieces it is an issue to be addressed.