Monitoring Factors in Quality Control of Reinforced Concrete Casting Works

Quality control of casting work is very necessary to be prepared to minimize material misuse and procedural errors in the field, so that it will produce quality concrete. Concrete qualityt that is not in accordance with planning is due to the absence of guidelines that will be a reference for a supervisor so that the implementation of the work is not in accordance with the quality standards used. The purpose of the study was to determine the factors of casting job supervision that can be used as a reference for supervision of reinforced concrete works. The study was conducted in the city of Medan by survey method. The research sample used was a multilevel development project located in the city of Medan with a total of 20 construction projects with purposive random sampling method. The research instrument is the supervisor's guide in the field and interviews developed by the research team. Research data obtained and processed using descriptive statistical analysis. The results of the study are that the factors for supervisors so that the casting can run well and in accordance with the quality of works are as follows: 1) Preparation stage: determine the quality of concrete, working track (ready mix mobilization), equipment placement, workforce preparation, and schedule casting. 2) Implementation phase: determination of casting lines, slump testing, manufacturing of test objects, Pouring / concreting and compaction. 3) Finishing Phase: Finishing, Maintenance, Scaffolding and mold opening.