This diploma work is about the comparison between the prefabricated and on-site mixed concrete frames for Cleopatra that is a multi-residential building in Västerås, Sweden. Prefabricated and on-site mixed concrete structures are two methods used in the construction of new buildings.
Due to lack of time after procurement of project contractors usually do not have time to make a detailed study for the selection of frames. In such cases they select a frame that has been chosen for previous projects with the lowest price that takes into account the client's budget for the project. The comparison is made between the prefabricated structure and the current structure which is on-site mixed with concrete and prefabricated concrete columns and concrete stairs for kv. Kleopatra. It is very time-efficient in the current situation to make use of prefabricated pillars and cement stairs. Pillars and beams are chosen to be made on-site moulded because there is a very few and due to that it is more expensive to buy these as prefabricated. The extra cost will be when the prefabricated factory use specific forms for those parts which are then discarded and the cost of these forms is then allocated on number of pillars and beams. On-site moulded structures are being built at the workplace and in need of reinforcement, forming, stamping, bending back, ready-mix concrete, crane, equipment for drying, calendaring, glazing and conservation. Prefab structures are built at the factory and transported to the construction site, and then they have a need for the crane, ready-mix concrete, reinforcement for floor plate and calendaring, glazing for these. The choice between the prefabricated and on-site mixed frame for kv. Kleopatra affects the environment, working environment, quality and timing and costs differently. These points are investigated and compared for the quarter. Kleopatra and the results we have arrived at through various methods, including interviews, surveys, literature studies and further research we have done. We have come to different conclusions for the work environment, quality, environment,timeschedule and costs.