NUGROHO, RIFQY SURYO (2016) KAJIAN PENGARUH SUDUT BIDANG DISKONTINU PADA UJI KUAT TEKAN UNIAKSIAL BATU TUFF. Other thesis, UPN 'VETERAN" YOGYAKARTA.
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Abstract
Keberadaan bidang diskontinu berupa bidang perlapisan pada batuan kerap
ditemui. Keberadaan bidang perlapisan ini akan mempengaruhi kekuatan massa
batuan. Namun terkadang conto batuan yang diuji di laboratorium umumnya tidak
memperhatikan adanya bidang perlapisan yang terbentuk. Oleh karena itu untuk
mengetahui pengaruh bidang diskontinu berupa bidang perlapisan perlu dilakukan
penelitian di laboratorium.
Penelitian dilakukan untuk mengetahui pengaruh sudut bidang diskotinu
pada kuat tekan uniaksial batu tuff. Conto penelitian berupa batu tuff yang diambil
dari Dusun Kedungpring, Desa Bawuran, Kecamatan Pleret, Kabupaten Bantul,
Provinsi Daerah Istimewa Yogyakarta. Batu tuff memiliki bidang diskontinu
berupa bidang perlapisan yang jelas terdefinisi. Bidang perlapisan yang akan
dilakukan penelitian memiliki kemiringan (tegak lurus dengan tegangan
utamanya 3 6 dan 9 .
Metode pengujian yang dilakukan dalam penelitian ini meliputi pengujian
petrografi, pengujian sifat fisik, pengujian ultrasonik, pengujian kuat tekan
uniaksial, dan pengujian kuat tarik tak langsung. Berdasarkan hasil pengujian,
nilai kuat tekan uniaksial yang didapatkan pada masing-masing bidang perlapisan
adalah 0
= 9,03 MPa, 30
= 7,89 MPa, 60
= 8,39 MPa, dan 90
= 9,10 MPa. Nilai
modulus Young (E) dan nisbah Poisson (v) didapatkan dari plot kurva teganganregangan. Nilai modulus Young (E) pada masing-masing bidang perlapisan adalah
0
= 2,15 GPa, 30
= 1,67 GPa, 60
= 1,72 GPa, 90
= 2,52 GPa dan nilai nisbah
Poisson (ν pada masing-masing bidang perlapisan adalah 0
= 0,13, 30
= 0,12,
60
= 0,25, dan 90
= 0,14.
Berdasarkan hasil pengujian, diperoleh nilai maksimum cepat rambat
gelombang ultrasonik batu tuff pada sudut 9 sebesar 1.937,8 m/s dan diperoleh
nilai minimum pada sudut 3 sebesar 1.814,7 m/s. Berdasarkan hasil pengujian,
nilai kuat tekan uniaksial batu tuff termasuk batuan yang lunak menurut ISRM
(1979) dan termasuk batuan yang sangat lunak menurut Bieniawski (1973) &
Tamrock (1988) karena mempunyai nilai kuat tekan uniaksial dibawah 25 MPa.
Berdasarkan anisotropik dan nilai kuat tekan uniaksial dari penelitian sebelumnya
terlihat adanya pengaruh sudut bidang diskontinu terhadap nilai kuat tekan
uniaksial dengan ditunjukkan bahwa kuat tekan minimum berada pada sekitar
3 dan kuat tekan maksimum berada pada 9
The existence of discontinuous field bedding plane in the rocks are often
encountered. The existence of this bedding plane will affect the strength of the
rock mass. But sometimes the rock samples tested in the laboratory is generally
don’t notice to the bedding plane is formed Therefore to determine the effect of
bedding plane in the form of discontinuous fields is necessary to do the laboratory
research.
The research was conducted to determine the effect dip of discontinuous
on tuff’s uniaxial compressive strength. The study sample of Tuff taken from
Kedungpring Hamlet, Bawuran Village, Pleret District, Bantul Regency, Special
Province of Yogyakarta Tuff has discontinued field a bedding plane is clearly
defined edding plane that will do the research to have a slope of
(perpendicular to the main stress 3 6 and 9
Methods of testing in this study include petrographic examination,
physical properties testing, ultrasonic testing, uniaxial compressive strength
testing and indirect tensile strength. Based on test results, uniaxial compressive
strength values obtained on each of the bedding plane is = 9,03 MPa, bedding
plane 3 = 7,89 MPa 6 = 8,39 MPa and 9 = 9,10 MPa. Value of Young's
modulus (E) and Poisson’s ratio (ν) obtained from the stress-strain curve plot.
Value of Young's modulus (E on each of the bedding plane is = 2,15 GPa,
bedding plane 3 = 1,67 GPa 6 = 1.72 GPa 9 = 2,52 GPa and Poisson’s ratio
value (ν in each of the bedding plane is = 0,13 3 = 0,12 6 = 0,25, and
bedding plane 9 = 0,14.
Based on tuff test results, obtained the maximum value of the propagation
of ultrasonic waves at an angle 9 = 1.937,8 m/s and minimum values obtained at
an angle 3 = 1.814,7 m/s. Based on test results, the value of tuff uniaxial
compressive strength included soft rock by ISRM (1979) and included a very soft
rock, according Bieniawski (1973) and Tamrock (1988) because it has a uniaxial
compressive strength values below 25 MPa. Based anisotropic and uniaxial
compressive strength value of previous studies have shown the influence of the
dip of discontinuous uniaxial compressive strength value to be shown that the
minimum compressive strength stands at about 3 and maximum compressive
strength is at 9 .
| Item Type: | Thesis (Other) |
|---|---|
| Subjek: | T Technology > TN Mining engineering. Metallurgy |
| Divisions: | x. Faculty of Engineering, Science and Mathematics > School of Engineering Sciences |
| Depositing User: | Darsini Darsini |
| Date Deposited: | 16 May 2016 02:52 |
| Last Modified: | 16 May 2016 02:52 |
| URI: | http://eprints.upnyk.ac.id/id/eprint/930 |
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