Pemanfaatan pasir besi sebagai agregat beton perisai radiasi struktur :: Studi kasus pasir besi Desa Oi ui Kecamatan Wera Kabupaten Bima Propinsi Nusa Tenggara Barat

TAUFIKURRAHMAN, Prof.Ir. Sukandarrumidi, M.Sc.,Ph.D

2007 | Tesis | S2 Teknik Geologi (Magister Geologi Pertambangan)

Tesis dengan judul “Pemanfaatan Pasir Besi Sebagai Agregat Beton Perisai Radiasi Struktur (Studi Kasus Pasir Besi Desa Oi Tui Kecamatan Wera Kabupaten Bima Propinsi Nusa Tenggara Barat)” di laksanakan di Kecamatan Wera, Kabupaten Bima, Propinsi Nusa Tenggara Barat. Secara geografis, daerah penelitian terletak pada 118º 59’ 00” - 119º 00’ 00” BT dan 08º 15’ 39” - 08º 17’ 39” LS. Metode penelitian yang digunakan terdiri atas 2 metode, yaitu penelitian lapangan dan penelitian laboratorium. Berdasarkan hasil percobaan dan analisis laboratorium, pasir besi memiliki berat jenis 3,112 gr/cm3, sehingga termasuk jenis unsur yang dapat digunakan sebagai bahan campuran beton perisai radiasi. Dari hasil uji kuat tekan beton agregat pasir besi dengan formula campuran 35 : 65 didapatkan nilai kuat tekan rata – rata sebesar 25,360 Mpa. Dengan kuat tekan tersebut, beton perisai radiasi struktur agregat pasir besi dapat digunakan pada konstruksi dinding penahan beban. Dari Hasil percobaan dan analisis laboratorium dengan menggunakan sumber radiasi Cs137 energi 661,6 KeV, beton perisai radiasi struktur agregat pasir besi memiliki nilai koefisien attenuasi (μ) sebesar 0,1845, dengan ketebalan maksimal dimana hasil pengurangan radiasinya mendekati nilai cacah latar (background) adalah 18 cm.

The thesis entitled" Exploiting Of Iron Sand As Structural Radiation Shield concrete aggregate (Case Study of Iron Sand in Oi Tui, Wera Subdistrict, Bima Regency, West Nusa Tenggara Province)" has been done in Wera Cubdistrict, Bima Regency, West Nusa Tenggara Province. Geographically, the research area is located 118º 59 ' 00" - 119º 00 ' 00" East Longitude and 08º 15 ' 39" - 08º 17 ' 39" South Latitude. Two methods of research were implemented i.e : field research and laboratory research. Based on laboratory analysis and experimental result, iron sand have specific gravity of 3,112 gr/cm3, so that including element type available for applied as component of radiation shield concrete mixture. From test result of compressive strength of iron sand aggregate concrete with mixture formula of 35 : 65 has been given the average of compressive strength value 25,360 Mpa. According to that experimental result the iron sand aggregate structure radiation shield concrete can be applied as wall construction retained of burden. From Laboratory analysis and experimental result by using radiant source Cs137 energy of 661,6 KeV, iron sand aggregate structure radiation shield concrete have coefficient attenuasi(μ) value 0,1845, with maximum in order to get thickness the minimized radiation result close to background value is 18 cm.

Kata Kunci : Pasir Besi,Agregat,Beton Perisai Radiasi, iron sand, aggregate, Radiation Shield concrete