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ANALISIS KUALITAS INTRUSI ANDESIT SEBAGAI BAHAN BANGUNAN BERDASARKAN SIFAT KETEKNIKAN DI DAERAH BEJI, KECAMATAN UNGARAN TIMUR, KABUPATEN SEMARANG, JAWA TENGAH

Authors

  • Nofrohu Retongga Jurusan Teknik Geologi, IST AKPRIND Yogyakarta
  • Dwi Indah Purnamawati Jurusan Teknik Geologi, IST AKPRIND Yogyakarta
  • Arie Noor Rakhman Jurusan Teknik Geologi, IST AKPRIND Yogyakarta

DOI:

https://doi.org/10.34151/technoscientia.v13i2.3184

Keywords:

Andesite, Building materials, Engineering properties, Intrusion, Petrographic

Abstract

This study aims to identify the quality of andesite intrusive rocks as a building material. The research location is in the Beji area, East Ungaran District, Semarang Regency, Central Java Province. Analysis of rock quality using data from the test results of engineering and petrographic properties. The andesite studied is an intrusion into basalt. Based on the quality standard requirements for natural stone for buildings (SNI 03-0394-1989) these rocks can be mined for building materials, especially medium to heavy building foundations (1,150.040 -1,421.621 kg/cm2). The middle andesite has a higher strength than the lower andesite. The strength of the rock is supported by resistant minerals in the form of plagioclase, which dominates up to 35%. However, in the andesite body getting down, olivine tends to decrease by 5%. The weathering of these minerals is influenced by the condition of the water in the rock where the water content is 0.391 to 0.412%. In water-saturated conditions, the degree of saturation of the lower rock can reach 100%, exceeding the rock above, 87.5%. The strength of the rock at the bottom is lower, making the slope potentially easy to collapse when the mining method is started from the bottom, especially the excavation is carried out on steep vertical slopes.

References

Anonim, 1989. Syarat Mutu Batu Alam untuk Bahan Bangunan menurut (SNI 03-0394-1989), Jakarta: Kementerian Pekerjaan Umum dan Perumahan Rakyat (PUPR).

Bemmelen, R.W. Van, 1949, The Geology of Indonesia, Vol. I.A, General Geology of Indonesia, Martinos Nijihoff, The Haque, Holand.

Eggleton, R.A., Foudoulis, C., and Varkevisser, D. 1987. Weathering of Basalt: Changes in Rock Chemistry and Mineralogy. Clays and Clay Minerals, 35(3), 161–169.

Hardjono, I., 2015. Vulkanologi dan Mineralogi Petrografi. Surakarta: Muhammadiyah University Press.

Praditya, 2017. Eksplorasi Sumberdaya Batuan Andesit Pada Lokasi Tambang PT. Sapta Mitra Nusantara Menggunakan Metode Geolistrik Di Desa Beji, Kecamatan Ungaran Timur, Kabupaten Semarang, Jawa Tengah. Skripsi. Jurusan Teknik Geologi. Semarang: Universitas Diponogoro.

Rai, M.A., Kramadibrata, S., Wattimena, R.K., 2013. Mekanika Batuan, Bandung: ITB.

Rakhman, A.N., Zakaria, Z., Muslim, D., Haryanto, I., Maulana. F.W. 2020. Mineralogical Control of Rock Slope Stability Assessment of Columnar Jointed Basaltic Rock Masses in the Cengkehan River Valley, Indonesia. Book of Abstracts of 5th International Conference of Geological Engineering Faculty (ICGEF 2020), The International Institute of Knowledge Management (TIIKM), Sri Lanka, ISBN 978-955-3605-80-1.

Rakhman, A.N., Zakaria, Z., Muslim, D., Haryanto, I., Mulyaningsih, S. 2018. Modification of Rock Mass Classification in the Rock Slope Platy Jointed Andesite at Seloharjo Area. International Journal of GEOMATE, 16 (53), 163–170.

Sribudiyani, Prasetya, I., Muchsin, N., Sapiie, B., Ryacudu, R., Asikin, S., Kunto, T., Harsolumakso, A.H., Astono, P., Yulianto, I. 2003. The Collision of The East Java Microplate and Its Implication for Hydrocarbon Occurrences in The East Java Basin. Proceedings of Indonesian Petroleum Association. Twenty-Ninth Annual Convention & Exhibition.

Sukandarrumidi, 2016. Bahan Galian Industri. Yogyakarta: Gadjah Mada University Press.

Thanden, R.E., Sumadirja, H., dan Richards, P.W. 1996. Peta Geologi Lembar Magelang dan Semarang. Bandung: Direktorat Geologi.

Verhoef, P.N.W., 1994. Geologi Untuk Teknik Sipil. Jakarta: Erlangga.

William, H., Turner, F.J., and Gilbert, C.M., 1982, Petrography: An Introduction to the Study of Rocks in Thin Sections, 2 nd ed., New york: W.H. Freeman and Co..

Zuhdi, M. 2019. Buku Ajar Pengantar Geologi. Mataram: Duta Pustaka Ilmu.

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Published

15-12-2020 — Updated on 15-12-2020

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How to Cite

Retongga, N., Purnamawati, D. I., & Rakhman, A. N. (2020). ANALISIS KUALITAS INTRUSI ANDESIT SEBAGAI BAHAN BANGUNAN BERDASARKAN SIFAT KETEKNIKAN DI DAERAH BEJI, KECAMATAN UNGARAN TIMUR, KABUPATEN SEMARANG, JAWA TENGAH. JURNAL TEKNOLOGI TECHNOSCIENTIA, 13(2). https://doi.org/10.34151/technoscientia.v13i2.3184