Now let us compare both these construction technologies with respect to various aspects like speed, quality, cost, and labor requirement
Both Precast and Mivan technologies are much faster than the conventional cast-in-situ construction. In the case of Precast, the elements are manufactured in a factory or on site and then joined and erected at site using cranes thereby reducing the time required for construction. In the case of Mivan, the lightweight Aluminum formwork can be quickly assembled and disassembled on site, which in turn reduces the time needed for construction. However, there are still some differences when these technologies are compared with each other:
|Once the design and BOQ are in place, the precast elements can be manufactured and cured very fast under controlled factory settings.
||Since concrete is poured into the formwork at site, the curing time is as long as the conventional construction method. This makes Mivan slower than precast when it comes to the time taken for construction.
|Transportation of precast elements is a delicate job and must be handled carefully. Therefore, there could be delays due to the time taken in transporting the precast elements to site, thereby causing an overall delay in construction. For large projects, however, precast elements can be cast on site, and this drawback can be avoided.
||There is no transportation of elements involved in this case. Everything is done on site.
Overall, Precast construction is faster than Mivan when it comes to large projects where the precast elements can be cast on site itself.
Both the technologies offer a high-quality finish and there is no need to spend extra time or additional amounts of money on finishing.
Both the technologies require less labor as compared to conventional construction methods but again, between the two, the amount of labor needed for precast is relatively small compared to Mivan.
The initial setup cost for Mivan as well as Precast is large. However, in general, Mivan technology can be more expensive due to the cost of the aluminum formwork and associated equipment. Precast concrete technology can also be costly, especially if transportation costs are high but again, as mentioned above, for very large projects, precast elements can be cast on site, thereby cutting on the significantly high transportation cost and making it a more viable alternative economically.
Mivan technology is limited in the size of structures it can construct, as the aluminum formwork has weight limitations while there is no such constraint with Precast concrete technology.
From the above comparison, it is clear that Precast Concrete technology has a definite edge over Mivan technology and more so, when it comes to large projects.