Analysis Waste Material of Construction on Concrete Column

High-rise buildings (multi-storey buildings) are currently increasing in development, in accordance with their functions as apartments, offices, shopping centers or educational activities. In the implementation of high-rise building construction involves a lot of resources. One of the construction resources needed in large quantities is material. In the process of implementing building construction, in addition to the results obtained are buildings, but during the implementation it produces waste material. Waste material generated during the construction process not only affects the productivity of the project, but also affects the environment. Therefore, it is necessary to identify the amount of waste material in construction, especially in column structure work in high-rise buildings. The purpose of this study was to determine the waste in construction projects, especially in reinforced concrete column structures in high-rise buildings. The object of this research is the waste material project of one of the University buildings in the city of Makassar. Waste identification is done through literature review, observation and secondary data. The waste variables reviewed in this study are wood, reinforcing steel, concrete, and bendrat wire. The sampling method in this research is purposive sampling. The results showed that the most waste material in the form of wood used in the formwork. The percentage of waste that comes from the use of wood in the formwork is around 21.9%. Furthermore, the percentage of waste originating from reinforcing steel ranges from 0.06% to 0.40%. The main cause of waste in wood as formwork, it is indicated that the demolition process is not good, so it cannot be used more than twice.