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ANALISIS KUAT LEKAT TULANGAN BAMBU WULUNG

TAKIKAN TIPE U JARAK 10 CM TERHADAP TULANGAN

BAJA

Analysis of Bond Strength Notched Bamboo Wulung Reinforcement type U

Distance 10 Cm of Steel Reinforcement

SKRIPSI

Disusun Untuk Memenuhi Persyaratan Memperoleh Gelar Sarjana Teknik Pada Jurusan Teknik Sipil Fakultas Teknik

Universitas Sebelas Maret Surakarta

Disusun oleh :

EKA JUNINGSIH

I 1112035

JURUSAN TEKNIK SIPIL FAKULTAS TEKNIK

UNIVERSITAS SEBELAS MARET

SURAKARTA

2015


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HALAMAN MOTTO

“Intelligence is not the determinant of success, but hard work is the real determinant

of your success”

Kecerdasan bukan penentu kesuksesan, tetapi kerja keras merupakan penentu

kesuksesanmu yang sebenarnya

“Think big and act now”

Berpikirlah besar dan bertindaklah sekarang

“Coming together is a beginning, keeping together is progress, working together is

success”

Memulai bersama adalah sebuah awalan, menjaganya untuk tetap bersama adalah

sebuah kemajuan dan bias bekerja sama adalah sebuah kesuksesan

(Henry Ford)


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HALAMAN PERSEMBAHAN

Kedua Orang tua saya yang tak henti-hentinya mendoakan dan selalu

memberikan pengorbanan dengan penuh kasih sayang.

Buat adik-adik saya Dwi Haryono dan Tri Mardiyanti yang selalu

menyemangati dan mendoakan saya.

Buat pacar saya Dagda Raditya Rumarna yang selalu memberi semangat dan

dorongan serta mendoakan saya.


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PENGANTAR

Alhamdulilllah, segala puji bagi Allah yang telah melimpahkan rahmat dan nikmat-

Nya, sehingga penyusun dapat menyelesaikan skripsi dengan judul “Analisis Kuat

Lekat Tulangan Bambu Wulung Takikan Tipe U Jarak 10 Cm Terhadap

Tulangan Baja”, sebagai salah satu syarat memperoleh gelar Sarjana di Jurusan

Teknik Sipil Fakultas Teknik Universitas Sebelas Maret Surakarta.

Pada kesempatan ini penyusun mengucapkan terima kasih kepada semua pihak yang

telah membantu dalam menyelesaikan penelitian skripsi dan penyusunan laporannya.

Penyusun mengucapkan terima kasih kepada:

1. Agus Setiya Budi, ST, MT selaku Dosen Pembimbing I Skripsi.

2. Ir. Sugiyarto, MT selaku Dosen Pembimbing II Skripsi.

3. Ir. Slamet Prayitno, MT. dan Ir. Endang Rismunarsi, MT. sebagai Dosen Penguji

Pendadaran.

4. Semua Staf Laboratorium Bahan dan Struktur Jurusan Teknik Sipil Fakultas

Teknik Universitas Sebelas Maret Surakarta.

5. Rekan-rekan Tim Peneliti Bambu atas kerjasama dan bantuannya.

6. Semua teman-teman non reguler tahun 2012.

7. Teman-teman kos saya Hamida, Zulia, Atik, dan Tika yang selalu memberi

motivasi.

Penyusun menyadari bahwa dalam laporan ini masih terdapat kekurangan. Oleh

karena itu kritik dan saran yang membangun selalu kami harapkan. Semoga laporan

ini bermanfaat bagi semua pihak.

Surakarta, Juni 2015

Penyusun


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DAFTAR ISI

HALAMAN JUDUL .................................................................................................. i

HALAMAN PERSETUJUAN .................................................................................. ii

HALAMAN PENGESAHAN .................................................................................. iii

HALAMAN MOTTO .............................................................................................. iv

HALAMAN PERSEMBAHAN ............................................................................... v

ABSTRAK ................................................................................................................ vi

ABSTRACT ............................................................................................................. vii

KATA PENGANTAR ............................................................................................ viii

DAFTAR ISI ............................................................................................................. ix

DAFTAR GAMBAR .............................................................................................. xiii

DAFTAR TABEL .................................................................................................. xvi

DAFTAR NOTASI DAN SIMBOL .................................................................... xviii

DAFTAR LAMPIRAN ........................................................................................... xx

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

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

1.2. Rumusan Masalah ........................................................................................... 2

1.3. Batasan Masalah ............................................................................................. 2

1.4. Tujuan Penelitian ............................................................................................ 3

1.5. Manfaat Penelitian .......................................................................................... 3


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BAB 2 TINJAUAN PUSTAKA DAN LANDASAN TEORI ................................. 4

2.1. Tinjauan Pustaka .......................................................................................... 4

2.2. Landasan Teori ............................................................................................. 5

2.2.1. Bambu .......................................................................................................... 5

2.2.2. Tulangan Bambu Bertakikan ........................................................................ 8

2.2.3. Baja Tulangan ............................................................................................. 10

2.2.4. Beton .......................................................................................................... 10

2.2.4.1. Semen PPC ................................................................................................. 11

2.2.4.2. Agregat ....................................................................................................... 11

2.2.4.3. Air .............................................................................................................. 13

2.2.4.4. Faktor Air Semen ........................................................................................ 13

2.2.5. Kuat Lekat .................................................................................................. 13

2.2.6. Uji Anova ................................................................................................... 17

BAB 3 METODE PENELITIAN ........................................................................... 18

3.1. Tinjauan Umum ......................................................................................... 18

3.2. Tahap Penelitian ......................................................................................... 18

3.3. Benda Uji dan Bahan ................................................................................. 21

3.3.1. Benda Uji ................................................................................................... 21

3.3.2. Bahan ......................................................................................................... 22

3.3.3. Peralatan Penelitian .................................................................................... 25

3.3.3.1. Timbangan ................................................................................................. 25

3.3.3.2. Ayakan ....................................................................................................... 26

3.3.3.3. Mesin Penggetar Ayakan (Siever Shaker) ................................................. 26

3.3.3.4. Oven ........................................................................................................... 26

3.3.3.5. Mesin Los Angeles ..................................................................................... 27

3.3.3.6. Cetakan Benda Uji ..................................................................................... 27

3.3.3.7. Kerucut Abrams ......................................................................................... 28


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3.3.3.8. Alat Bantu ................................................................................................... 28

3.3.3.9. Molen ......................................................................................................... 29

3.3.3.10. Universal Testing Machine ........................................................................ 29

3.3.3.11. Compression Testing Machine ................................................................... 30

3.4. Pengujian Pendahuluan .............................................................................. 30

3.4.1. Pengujian Kuat tarik Baja Tulangan .......................................................... 30

3.4.2. Pengujian Bambu ....................................................................................... 31

3.4.3. Pengujian Bahan Pembentuk Beton ........................................................... 34

3.4.3.1. Agregat Halus ............................................................................................ 34

3.4.3.2. Agregat kasar ............................................................................................. 39

3.5. Pembuatan Benda Uji Mix Design ............................................................. 43

3.5.1. Pembuatan Benda Uji Mix Design ............................................................. 43

3.5.2. Pengujian Kuat Tekan ................................................................................ 45

3.6. Pembuatan Benda Uji Lekat ...................................................................... 46

3.6.1. Tahapan Pembuatan Benda Uji .................................................................. 46

3.6.2. Perawatan Benda Uji (Curing) ................................................................... 48

3.7. Pengujian Kuat Lekat ................................................................................. 48

3.8. Analisis Data .............................................................................................. 50

BAB 4 ANALISIS DATA DAN PEMBAHASAN ................................................ 51

4.1. Hasil Pengujian Kuat Tarik Baja dan Bambu ............................................. 51

4.2. Hasil Pengujian Material Beton ................................................................. 53

4.3. Hasil Pengujian Slump ............................................................................... 58

4.4. Hasil Pengujian Kuat Desak Beton ............................................................. 58

4.5. Hasil Pengujian Kuat Lekat ....................................................................... 59

4.5.1. Kuat Lekat Tulangan Baja Polos ................................................................ 59

4.5.2. Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Sejajar Jarak 100 mm

Lebar Takikan 10 mm ................................................................................. 63

4.5.3. Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Tidak Sejajar

Jarak 100 mm Lebar Takikan 10 mm ......................................................... 69


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4.5.4. Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Sejajar Jarak 100 mm

Lebar Takikan 20 mm ................................................................................. 73

4.5.5. Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U Tidak Sejajar

Jarak 100 mm Lebar Takikan 20 mm ......................................................... 78

4.6. Hasil Uji Statistik Anova ........................................................................... 85

4.6.1. Uji Kenormalan .......................................................................................... 85

4.6.2. Uji Homogenitas Variansi .......................................................................... 85

4.6.3. Uji One Way Anova .................................................................................... 86

4.6.4. Uji Perbandingan ........................................................................................ 87

4.7. Pembahasan ................................................................................................ 89

4.7.1. Kuat Tarik Tulangan Baja dan Bambu ...................................................... 89

4.7.2. Kuat Lekat Beton pada Beban Saat Sesar 0,25 mm .................................... 89

BAB 5 KESIMPULAN DAN SARAN ................................................................... 91

5.1. Kesimpulan ................................................................................................ 91

5.2. Saran ........................................................................................................... 91

DAFTAR PUSTAKA ............................................................................................. 92


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DAFTAR GAMBAR

Gambar 2.1. (1) Tipikal Bentuk Tulangan Baja Deformasi .......................................... 9

(2) Bambu Takikan .................................................................................. 9

Gambar 2.2. Beberapa Bentuk Takikan pada Tulangan Bambu ................................... 9

Gambar 2.3. Tulangan Bambu Takikan “U” Lebar Takikan 1 Cm dan 2 Cm Sejajar

dan Tidak Sejajar dengan Jarak 10 Cm .................................................. 10

Gambar 2.4. Pengujian Pull Out ................................................................................. 15

Gambar 2.5. Sesar antara Tulangan dan Beton ........................................................... 16

Gambar 3.1. Diagram Alir Penelitian ......................................................................... 20

Gambar 3.2. Gambar Takikan Jarak 10 Cm Lebar 1 Cm dan 2 Cm dengan Variasi

Sejajar dan Tidak Sejajar ....................................................................... 21

Gambar 3.3. Gambar Potongan dan Tampak Atas Benda Uji Lekat Beton............... 22

Gambar 3.4. Portland Pozolan Cement (PPC) ............................................................ 22

Gambar 3.5. Air .......................................................................................................... 23

Gambar 3.6. Pasir ........................................................................................................ 23

Gambar 3.7. Kerikil .................................................................................................... 24

Gambar 3.8. Tulangan Baja ........................................................................................ 24

Gambar 3.9. Bambu Wulung ...................................................................................... 25

Gambar 3.10.Timbangan............................................................................................. 25

Gambar 3.11.Ayakan .................................................................................................. 26

Gambar 3.12.Oven ...................................................................................................... 26

Gambar 3.13.Mesin Los Angeles ................................................................................ 27

Gambar 3.14.Cetakan Benda Uji ................................................................................ 27

Gambar 3.15.Kerucut Abrams .................................................................................... 28

Gambar 3.16.Alat Bantu ............................................................................................. 28

Gambar 3.17.Molen .................................................................................................... 29

Gambar 3.18.UTM ...................................................................................................... 29

Gambar 3.18.CTM ...................................................................................................... 30

Gambar 3.20.Pengujian Kuat Tarik Tulangan Baja .................................................... 30


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Gambar 3.21. Uji Kuat Tarik Bambu Sejajar Serat .................................................... 31

Gambar 3.22. Pembuatan Benda Uji Kuat Geser dan Tekan Bambu ......................... 31

Gambar 3.23. Pengukuran Benda Uji Kuat Geser Bambu .......................................... 32

Gambar 3.24. Uji Kuat Geser Bambu ......................................................................... 32

Gambar 3.25. Uji Kuat Tekan Sejajar Serat ............................................................... 32

Gambar 3.26. Uji Kadar Air........................................................................................ 33

Gambar 3.27. Uji Modulus Elastisitas ........................................................................ 34

Gambar 3.28. Proses Pengujian Kadar Lumpur Pasir ................................................. 35

Gambar 3.29. Pengujian Kadar Zat Organik............................................................... 36

Gambar 3.30. Pengujian Sampel dengan Kerucut Terpancung .................................. 37

Gambar 3.31. Penimbangan Sampel Specific Gravity ................................................ 38

Gambar 3.32. Volumetricflash .................................................................................... 38

Gambar 3.33. Pengujian Gradasi Agregat Halus ........................................................ 39

Gambar 3.34. Proses Pencucian Agregat Kasar .......................................................... 40

Gambar 3.35. Proses Pengelapan Agregat Uji Specific Gravity ................................. 40

Gambar 3.36. Penimbangan Sampel Specific Grafity ................................................. 41

Gambar 3.37. Neraca Timbang ................................................................................... 41

Gambar 3.38. Proses Pengguncangan Ayakan ........................................................... 42

Gambar 3.39. Proses Pengujian Abrasi ....................................................................... 43

Gambar 3.40. Proses Penimbangan Material .............................................................. 44

Gambar 3.41. Proses Penyaringan Material ................................................................ 44

Gambar 3.42. Pembuatan Benda Uji Silinder ............................................................. 45

Gambar 3.43. Alat Uji Kuat Tekan Beton .................................................................. 45

Gambar 3.44. Pemotongan Bambu ............................................................................. 46

Gambar 3.45. Pembuatan Tulangan Bambu ............................................................... 46

Gambar 3.46. Proses Pencampuran Beton .................................................................. 47

Gambar 3.47. Penanaman Tulangan Bambu ............................................................... 47

Gambar 3.48. Benda Uji Lekat ................................................................................... 48

Gambar 3.49. Perawatan Benda Uji ............................................................................ 48

Gambar 3.50. Uji Kuat Lekat Bambu Beton ............................................................... 49


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Gambar 4.1. Grafik Gradasi Agregat Halus ................................................................ 55

Gambar 4.2. Grafik Gradasi Agregat Kasar ................................................................ 57

Gambar 4.3. Uji Slump ................................................................................................ 58

Gambar 4.4. Grafik Hubungan Beban-Sesar antara Beton dan Tulangan Baja

Diameter 8 mm ...................................................................................... 62

Gambar 4.5. Grafik Hubungan Beban-Sesar BWS1 ................................................... 67

Gambar 4.6. Grafik Hubungan Beban-Sesar BWTS1 ................................................ 72

Gambar 4.7. Grafik Hubungan Beban-Sesar BWS2 ................................................... 76

Gambar 4.8. Grafik Hubungan Beban-Sesar BWTS2 ................................................ 81

Gambar 4.9. Nilai Kuat Lekat Variasi Tulangan pada Beton ..................................... 84

Gambar 4.10.Tulangan Bambu Wulung Setelah Diuji .............................................. 90


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DAFTAR TABEL

Tabel 2.1. Berat Jenis Dari 6 Jenis Bambu (gr/cm2) .................................................. 6

Tabel 2.2. Jenis-jenis Semen Portland ..................................................................... 11

Tabel 2.3. Persyaratan Gradasi Agregat Halus ......................................................... 12

Tabel 2.4. Persyaratan Gradasi untuk Agregat Kasar ............................................... 12

Tabel 3.1. Tabel Perubahan Warna ........................................................................... 36

Tabel 4.1. Hasil Pengujian Kuat Tarik Baja dan Bambu .......................................... 52

Tabel 4.2. Hasil Pengujian Kandungan Lumpur pada Pasir Seberat 100 Gram. ...... 53

Tabel 4.3. Hasil Pengujian Specific Gravity Agregat Halus ..................................... 54

Tabel 4.4. Hasil Pengujian Gradasi Agregat Halus .................................................. 54

Tabel 4.5. Hasil Pengujian Spesific Gravity Agregat Kasar ..................................... 56

Tabel 4.6. Hasil Pengujian Gradasi Agregat Kasar .................................................. 56

Tabel 4.7. Hasil Pengujian Abrasi Agregat Kasar .................................................... 57

Tabel 4.8. Hasil Pengujian Kuat Desak Beton .......................................................... 58

Tabel 4.9. Sesar antara Beton dan Tulangan Baja Ø 8 mm ...................................... 59

Tabel 4.10. Kuat Lekat Beton dengan Tulangan Baja Polos (Ø 8 mm). .................... 63

Tabel 4.11. Sesar antara Beton dan Tulangan Bambu Wulung Takikan Bentuk U

Sejajar Jarak 100 mm Lebar Takikan 10 mm. ......................................... 64

Tabel 4.12. Hasil kuat lekat benda uji BWS1 ............................................................. 68


Tidak Sejajar Jarak 100 mm Lebar Takikan 10 mm ................................ 69

Tabel 4.14. Hasil kuat lekat benda uji BWTS1........................................................... 73


Sejajar Jarak 100 mm Lebar Takikan 20 mm .......................................... 73

Tabel 4.16. Hasil kuat lekat benda uji BWS2 ............................................................. 77


Tidak Sejajar Jarak 100 mm Lebar Takikan 20 mm ................................. 78

Tabel 4.18. Hasil kuat lekat benda uji BWTS2........................................................... 82

Tabel 4.19. Kuat Lekat antara Berbagai Variasi Tulangan dan Beton ....................... 83


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Tabel 4.20. Hasil Uji Kenormalan .............................................................................. 85

Tabel 4.21. Hasil Homogenitas Variansi .................................................................... 86

Tabel 4.22. Hasil Uji One Way Anova........................................................................ 86

Tabel 4.23. Hasil Uji Perbandingan Tukey ................................................................. 87

Tabel 4.24. Hasil Kesimpulan ..................................................................................... 88


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DAFTAR LAMPIRAN

LAMPIRAN A : Hasil Uji Pendahuluan Material

LAMPIRAN B : Grafik Hasil Uji Pendahuluan Bambu dan Baja

LAMPIRAN C : Rencana Campuran Adukan Beton

LAMPIRAN D : Hasil Uji Pull Out

LAMPIRAN E : Hasil Analisis Statistik

LAMPIRAN F : Dokumentasi Penelitian

LAMPIRAN G : Berkas Administrasi Skripsi


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DAFTAR NOTASI DAN SIMBOL

ASTM = American Society for Testing and Materials

SKSNI = Surat Keputusan Standar Nasional Indonesia

PBI = Peraturan Beton Bertulang Indonesia

Ka = Kadar Air (%)

Wb = berat kering udara

Wa = berat kering oven

BJ = Berat jenis bambu

Wa = Berat benda uji kering oven (gram)

Gb = Berat air yang volumenya sama dengan volume benda uji kering

oven (gram)

//tr = kuat tarik bambu sejajar serat (MPa)

Pmaks = beban tarik maksimum (N)

A = luas tampang tarik bambu (mm2)

𝜎𝑚𝑎𝑘𝑠 = kekuatan/tegangan tekan pada batas maksimum

E = modulus elastisitas

σp = kekuatan/tegangan tekan pada batas elastic

εp = regangan tekan pada batas elastic

= kekuatan/tegangan geser bambu

P = beban maksimum (kg)

L = bentang bebas (cm)

b = lebar takikan (mm)

c = jarak antar takikan (mm)

d = lebar efektif tulangan bambu (mm)

b = lebar benda uji (cm)

h = tebal benda uji (cm)

ds = diameter tulangan baja (mm)

Ld = panjang penanaman (mm)

lb = lebar tulangan bambu (mm)


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tb = tebal tulangan bambu (mm)

μ =kuat lekat (MPa)

∆s = sesar (mm)

z = pertambahan panjang total (mm)

∆L = pertambahan panjang bambu (mm)

Lo = panjang bambu mula-mula (mm)

k = konstanta

G0 = Pasir sebelum dicuci (kering 1100 C, 24 jam)

G1 = Pasir setelah dicuci (kering 1100 C, 24 jam)

Ab = Luas penampang bambu (mm2)

Ad = Luas penanaman (mm2)

As = Luas penampang tulangan baja (mm2)

Lo = Jarak Penjepitan (mm)

Ld = Panjang Penyaluran (mm)

Es = Modulus Elastisitas baja (MPa)

Ewulung = Modulus Elastisitas bambu Wulung (MPa)

P = Beban pada benda uji (N)

p = Modulus halus butir pasir

Pleleh = Beban leleh baja tulangan (N)

Pmaks = Beban maksimum baja tulangan (N)

Sr = Deviasi Standar (MPa)

f’c = Kuat tekan beton (MPa)

f’cr = Kuat Tekan Rerata (MPa)

M = Nilai Tambah Kuat Tekan Beton Rencana (MPa)

Fas = Faktor air semen

W = Persentase berat pasir terhadap berat kerikil

leleh = Tegangan leleh baja (MPa)

maks = Tegangan maksimum baja (MPa)


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ABSTRAK

Eka,2015, Analisis Kuat Lekat Tulangan Bambu Wulung Takikan Tipe U

Jarak 10 Cm Terhadap Tulangan Baja, Skripsi, Jurusan Teknik Sipil Fakultas

Teknik Universitas Sebelas Maret Surakarta,

Banyaknya pembangunan yang menggunakan struktur beton bertulang

menyebabkan kebutuhan tulangan baja sebagai tulangan beton akan meningkat

dan menjadi semakin langka karena bahan baku dari tulangan baja adalah biji

besi yang tidak dapat diperbaharui. Oleh sebab itu, perlu alternatif baru

pengganti tulangan baja pada beton. Bambu dipilih sebagai tulangan alternatif

beton karena bambu merupakan produk hasil alam yang renewable, murah,

mudah ditanam, pertumbuhan cepat, dapat mereduksi efek global warming.

Adanya lekatan antara tulangan dengan beton merupakan salah satu syarat

struktur beton bertulang supaya tidak selip. Takikan pada tulangan bambu dapat

membantu mengunci antara beton dan tulangan.

Metode yang digunakan dalam penelitian ini adalah metode eksperimen

laboratorium yang dilakukan di Laboratorium Bahan dan Struktur Fakultas

Teknik Universitas Sebelas Maret Surakarta. Benda uji yang digunakan dalam

penelitian ini beton silinder dengan diameter 150 mm dan tinggi 300 mm.

Tulangan bambu yang digunakan adalah bambu wulung takikan tipe U jarak 10

cm dengan dimensi lebar 20 mm dan tebal 5,2 mm lebar takikan 1 cm dan 2 cm

dengan variasi sejajar dan tidak sejajar. Sebagai pembanding tulangan baja polos

dengan diameter 8 mm. Tulangan ditaman pada pusat beton silinder sedalam 250

mm.

Dari hasil pengujian pull out diperoleh beban yang bervariasi kemudian diuji

statistik kenormalan dan menghasilkan rata-rata penyebaran yang normal dan

merata. Dengan uji anova didapatkan perbandingan rata-rata bambu terhadap baja

yang berbeda dan bambu terhadap bambu memiliki rata-rata sama. Nilai kuat

lekat rerata beton dengan tulangan bambu wulung takikan tipe U jarak 100 mm

sejajar lebar takikan 10 mm sebesar 0,130 MPa dan nilai kuat lekat rerata beton

dengan tulangan bambu wulung takikan tipe U jarak 100 mm sejajar lebar takikan

20 mm sebesar 0,136 MPa. Nilai kuat lekat rerata beton dengan tulangan bambu

wulung takikan tipe U jarak 100 mm tidak sejajar lebar takikan 10 mm sebesar

0,054 MPa dan nilai kuat lekat rerata beton dengan tulangan bambu wulung

takikan tipe U jarak 100 mm tidak sejajar lebar takikan 20 mm sebesar 0,122

MPa. Nilai kuat lekat rerata beton dengan tulangan baja sebesar 0,548 MPa. Dari

data diatas dapat ditarik kesimpulan bahwa nilai kuat lekat rerata beton dengan

tulangan bambu wulung takikan sejajar sebesar 0,248 kali dari nilai kuat lekat

tulangan baja polos diameter 8 mm dengan presentasi sebesar 24,80 %. Nilai kuat

lekat rerata beton dengan tulangan bambu wulung takikan tidak sejajar sebesar 0,222 kali dari nilai kuat lekat tulangan baja polos diameter 8 mm dengan

presentasi sebesar 22,20 %.

Kata Kunci: bambu wulung, baja, beton, takikan, kuat lekat.


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ABSTRACT

Eka, 2015, Analysis of Bond Strength Notched Bamboo Wulung Reinforcement

U Type Distance 10 cm Against Steel Reinforcement, Skripsi, Department of

Civil Engineering Faculty of Engineering, Sebelas Maret University Surakarta,

The amount of development that use reinforced concrete structures led to the need

of reinforcing steel as reinforcement of concrete will increase and become

increasingly scarce because the raw material of reinforcing steel is iron ore that

can not be renewed, Therefore, it needs a new alternative replacement of steel

reinforcement in concrete, Bamboo was chosen as an alternative to concrete

reinforcement because bamboo is a renewable natural products, inexpensive, easy

to grow, fast growth, can reduce the effects of global warming, Their appendage

between concrete reinforcement is one of the requirements for reinforced concrete

structures , Notches on bamboo reinforcement can help lock between concrete and

reinforcement,

The method used in this research is the method of laboratory experiments

conducted at the Laboratory of Materials and Structures of the Faculty of

Engineering, Sebelas Maret University Surakarta, Specimens used in this study a

concrete cylinder with a diameter of 150 mm and a height of 300 mm,

Reinforcement of bamboo used is a U-type bamboo wulung notch distance of 10

cm with a width dimension of 20 mm and a thickness of 5.2 mm wide indentation

1 cm and 2 cm with variations in parallel and not parallel, For comparison

reinforcing steel with a diameter of 8 mm plain, Reinforcement the park in the

center of the cylinder as deep as 250 mm concrete,

Pull out of the test results obtained by varying loads are then tested statistical

normality and the average yield spread of the normal and evenly, With ANOVA

test found the average ratio of the different steel bamboo and bamboo for bamboo

has the same averrage, Strong bonding values mean concrete with reinforcement

bamboo wulung U-type notch distance of 100 mm wide parallel notches 10 mm

by 0.130 MPa and values mean strong bonding of concrete with reinforcement

bamboo wulung U-type notch distance of 100 mm wide parallel notches 20 mm

of 0.136 MPa, The mean value of strong bonding with reinforced concrete U-type

bamboo wulung notch distance of 100 mm is not parallel notches 10 mm wide by

0.054 MPa and a mean value of the strong bonding of concrete with

reinforcement bamboo wulung U-type notch distance of 100 mm is not parallel

notches 20 mm wide by 0.122 MPa, Strong bonding values mean concrete with

steel reinforcement amounting to 0.548 MPa, From the above data it can be

deduced that the average value of the strong bonding of concrete with

reinforcement of bamboo wulung is parallel notches 0.248 times of the value of

strong bonding plain steel reinforcement diameter of 8 mm with presentation 24,8

%. the average value of the strong bonding of concrete with reinforcement of

bamboo wulung is not parallel notches 0.248 times of the value of strong bonding

plain steel reinforcement diameter of 8 mm with presentation 24,8 %.

Key Word: bamboo wulung. Steel. Concrete. Notch. Bond strength,

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