PERBANDINGAN BIAYA DAN WAKTU METODE PENGECORAN MENGGUNAKAN TOWER CRANE DAN CONCRETE PUMP PADA PEMBANGUNAN GEDUNG BUSINESS CENTER POLTEKPAR BALI

Abstract

Casting in the construction project of the "Bali Polytechnic Business Center Building" uses two types of casting heavy equipment, namely tower cranes and concrete pumps. The use of these two tools has advantages and disadvantages in terms of cost and time. This study aims to find out the comparison of casting costs and times using tower cranes and concrete pumps. The data of this study was obtained from the results of interviews and direct observation of the casting of beams and floor plates using tower cranes and concrete pumps, each of which was 20 truck mixers with a capacity of 5m³. Data analysis includes worker productivity, cycle time, worker wages and heavy equipment rentals. The results of the analysis show that, the cost of concrete per 1 m³ in the construction project of the Bali Polytechnic Polytechnic Business Center Building using a tower crane is Rp 1.273.904,- and the casting using a concrete pump is Rp 991.346,- This shows that the cost of casting using a
tower crane is more expensive than using a concrete pump. The cost of concrete per 1 m³ already consists of the cost of ready mix concrete, wages, and heavy equipment rental. The casting time per 1 m³ is 13.76 minutes for casting using a tower crane and 5.45 minutes for casting using a concrete pump. This shows that casting using tower cranes is 2.13 times slower than casting using concrete pumps.