Karakterisasi Sifat Fisik Batupasir Daerah Jantho dan Krueng Raya Menggunakan Uji Gelombang Ultrasonik
DOI:
https://doi.org/10.26418/positron.v9i1.29843Keywords:
batupasir, porositas, gelombang ultrasonik, cepat rambat, atenuasiAbstract
Penelitian sifat fisik batupasir daerah Jantho dan Krueng Raya dilakukan untuk mengetahui karakteristik batuan masing-masing daerah. Karakteristik batuan diamati melalui respon gelombang ultrasonik pada dua frekuensi berbeda untuk mengetahui nilai cepat rambat dan atenuasi gelombang. Sifat fisis yang diukur meliputi porositas, specific gravity, dan koefesien absorpsi. Hasil pengukuran menunjukkan nilai porositas batupasir daerah Jantho dan Krueng Raya memiliki nilai rata-rata 22% dan 25%. Respon cepat rambat yang dihasilkan pada sampel K16 (ðœ™=2,86%) dan K33 (ðœ™=8%) pada input frekuensi 1MHz bernilai 4040 m/s dan 3797 m/s, serta koefisien atenuasi bernilai 1,824. Sedangkan, respon cepat rambat yang diperoleh pada sampel Jantho tidak terdeteksi pada instrumen pengukuran. Keterbatasan penguatan sinyal dan tingginya kadar prositas tiap sampel berpengaruh besar pada tiap parameter yang diukur. Peninjauan terhadap jenis sampel yang lebih homogen dapat membantu pengamatan respon gelombang yang lebih baik.
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