DAFTAR ISI

Halaman

PRAKATA ................................................................................................... i

DAFTAR ISI ................................................................................................ iii

DAFTAR GAMBAR ................................................................................... vii

DAFTAR TABEL ....................................................................................... viii

DAFTAR LAMPIRAN ............................................................................... ix

BAB I PENDAHULUAN ........................................................................... 1

1.1 Latar Belakang ......................................................................... 1

1.2 Tujuan Penelitian .................................................................... 2

1.3 Ruang Lingkup Penelitian ........................................................ 2

1.4 Metode Penelitian..................................................................... 3

1.5 Sistematika Penulisan............................................................... 5

BAB II TINJAUAN UMUM ..................................................................... 6

2.1 Lokasi dan Kesampaian Daerah ............................................... 6

2.2 Sejarah Perusahaan .................................................................. 8

2.3 Iklim ......................................................................................... 10

2.4 Keadaan Morfologi.................................................................... 11

2.5 Sifat Fisik Material..................................................................... 13

iii

iv

2.6 Bahan Baku Pembuatan Semen ................................................ 14

2.7 Langkah- Langkah Pembuatan Semen....................................... 15

2.8 Produk yang Dihasilkan............................................................. 15

2.9 Unit Penunjang produksi ........................................................... 18

2.9.1 Unit Penyediaan Air....................................................... 18

2.9.1.1 Sumber Air .................................................... 19

2.9.1.2 Pengelolaan Air.............................................. 19

2.9.2 Unit Pembuatan Kantong Semen.................................... 19

2.9.2.1 Unit Fabrikasi dan Perbaikan Mesin.............. 20

2.9.3 Unit Penyediaan Bahan Bakar........................................ 21

BAB III LANDASAN TEORI .................................................................... 23

3.1 Klasifikasi Material Berdasarkan Kemudahan Penggalian........ 23

3.2 Produksi Alat Angkut Dump Truck ........................................... 24

3.3 Waktu edar Alat Angkut Dump Truck........................................ 25

3.4 Efisiensi Kerja............................................................................. 26

3.5 Tipe Pembiayaan Alat................................................................. 28

3.5.1 Biaya Kepemilikan......................................................... 29

3.5.1.1 Biaya Investasi.................................................... 30

3.5.1.2 Biaya penyusutan (Depresiasi)........................... 31

3.5.2 Biaya Operasi ................................................................. 33

3.5.2.1 Biaya Bahan Bakar ............................................. 34

3.5.2.2 Biaya Pelumas .................................................... 35

v

3.5.2.3 Biaya Ban............................................................ 36

3.5.2.4 Biaya Pemeliharaan dan Perawatan Alat............. 36

3.5.2.5 Biaya Operator.................................................... 36

BAB IV PENGAMATAN LAPANGAN ................................................... 37

4.1 Kegiatan Penambangan Batu Gamping ...................................... 37

4.2 Waktu Kerja Produksi.................................................................. 40

4.3 Faktor Pengisian .......................................................................... 45

4.4 Perhitungan Produksi Dump Truck ............................................ 47

4.5 Biaya Kepemilikan Dump Truck ................................................ 49

4.5.1 Biaya Penyusutan Dump Truck (Depresiasi).................... 49

4.5.2 Biaya Investasi Dump Truck............................................ 50

4.6 Biaya Operasi Dump Truck......................................................... 52

4.6.1 Biaya Bahan Bakar ................................................... 53

4.6.2 Biaya Pelumas (oli) ................................................... 53

4.6.3 Biaya Filter................................................................. 56

4.6.4 Biaya Ban .................................................................. 57

4.6.5 Biaya Pemeliharaan dan Perbaikan ........................... 57

4.6.6 Biaya Upah Operator................................................. 58

4.6 Biaya Satuan Pekerjaan................................................................ 58

BAB V PEMBAHASAN ............................................................................ 59

5.1 Analisis Operasi Alat Dump Truck ............................................ 59

vi

5.1.1 Waktu Siklus................................................................... 59

5.1.2 Kondisi Material ............................................................. 63

5.1.3 Efisiensi Kerja................................................................. 64

5.2 Biaya Kepemilikan....................................................................... 65

5.2.1 Biaya Penyusutan............................................................ 65

5.2.2 Biaya Investasi................................................................ 66

5.3 Biaya Operasi............................................................................... 67

5.3.1 Biaya Bahan Bakar ......................................................... 67

5.3.2 Biaya Pelumas ................................................................ 68

5.3.3 Biaya Filter...................................................................... 69

5.3.4 Biaya Ban ....................................................................... 69

5.3.5 Biaya Pemeliharaan dan Perbaikan ................................ 70

5.3.6 Biaya Upah Operator....................................................... 71

5.4 Biaya Satuan Pekerjaan................................................................ 71

BAB VI SIMPULAN DAN SARAN........................................................... 74

6.1 Kegiatan Penambangan Batu Gamping ...................................... 74

6.2 Waktu Kerja Produksi.................................................................. 75

DAFTAR PUSTAKA .................................................................................. 76

LAMPIRAN ................................................................................................. 78