PERENCANAAN PRODUKTIVITAS DAN BIAYA OPERASIONAL ALAT BERAT CONCRETE PUMP DAN TRUCK MIXER PADA PEKERJAAN PENGECORAN STRUKTUR (STUDI KASUS: PROYEK GEDUNG MAIN OFFICE STAOF DUMAI, RIAU)   

PRODUCTIVITY PLANNING AND OPERATIONAL COSTS OF CONCRETE PUMP AND TRUCK MIXER HEAVY EQUIPMENT IN STRUCTURAL CASTING WORK (CASE STUDY: MAIN OFFICE BUILDING PROJECT OF DUMAI STAFF, RIAU)

Poor coordination between the concrete pump and truck mixer during concrete casting often results in idle time and increased operational costs. This study aims to calculate the productivity of both equipment, determine their operational costs, and identify the factors affecting productivity in the Main Office STAOF Building Project in Dumai, Riau. This research uses a descriptive quantitative method with a time study approach and structured interviews. Observations are focused on first-floor casting, including slabs, columns, pile caps, and tie beams.

The results indicate that the productivity of the concrete pump ranges from 0.328 m³/minute (slab work) to 0.566 m³/minute (tie beam), while the productivity of the truck mixer ranges from 0.808 to 0.891 m³/minute. The operational cost of the concrete pump is IDR 1,024,124.00 per hour, while the truck mixer costs IDR 600,187.00 per hour. The dominant factors causing delays in the casting process are delays in truck mixer arrival (85.3%) and concrete pump failures (81.3%).

Keywords: concrete pump, truck mixer, Heavy Equipment Productivity, Operational Cost, Structural Concrete Work