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    Evaluation of precast slabs (hollow core) compared to-site casting in cost and time management of public buildings in Iraq
    (İstanbul Gedik Üniversitesi, 2023) Hameed, Saleem Mohammed Yaseen Al; Ulutagay, Gözde
    The importance of project management is manifested in reducing costs and project completion times and choosing the type of system that suits the construction, as the construction method is one of the most important factors that contribute to determining the time and cost of the project. The method of implementing slabs using precast hollow core panels has many advantages, including speed in implementation to save time and an appropriate cost, this method reduces the use of molds and manpower, which means an increase in productivity and a cleaner environment, in addition to many advantages, including the presence of cavities that reduce the weight of these panels and thus reduce the load on the building. In this study, the implementation of slabs by the traditional method (casting on-site) in projects and buildings in Iraq was compared, then the traditional system was changed to precast hollow core panels, and the cost and time were compared between the two methods. Field tours of these projects were taken, a search was conducted for cost and time information for the implementation of these projects from the relevant stakeholders, and secondary and primary data were obtained about the projects, price analysis, and time of completion. By comparing the two methods, it was found that the implementation of slabs by the method of hollow core panels takes 38 days less time than the traditional method (in-site casting), as it took 121 days to cast the slabs traditionally, while the hollow core method took only 83 days, which is 31.4% faster. As for the cost, the secondary data results indicated that the method of implementing the slabs with precast panels is 17% less expensive than the slabs implemented traditionally. Also, the preliminary data showed that the precast method in the building closest to the factory for the production of hollow core panels was the lowest cost by 16.8%, and in the farthest building, it was lower by 13.9%.