<mets:mets LABEL="Eprints Item" xsi:schemaLocation="http://www.loc.gov/METS/ http://www.loc.gov/standards/mets/mets.xsd http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-3.xsd" OBJID="eprint_43720" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mods="http://www.loc.gov/mods/v3" xmlns:mets="http://www.loc.gov/METS/" xmlns:xlink="http://www.w3.org/1999/xlink"><mets:metsHdr CREATEDATE="2026-06-10T20:36:29Z"><mets:agent TYPE="ORGANIZATION" ROLE="CUSTODIAN"><mets:name>Repository Universitas Negeri Padang</mets:name></mets:agent></mets:metsHdr><mets:dmdSec ID="DMD_eprint_43720_mods"><mets:mdWrap MDTYPE="MODS"><mets:xmlData><mods:titleInfo><mods:title>Analisis Teknis Kualitas Shotcrete Penyangga Terowongan&#13;
di Lokasi DFW Selatan Ciguha Utama L 500 Tambang&#13;
Emas Pongkor PT. ANTAM TBK UBPE Pongkor, Bogor,&#13;
Jawa Barat</mods:title></mods:titleInfo><mods:name type="personal"><mods:namePart type="given">Sondra</mods:namePart><mods:namePart type="family">Fetronal</mods:namePart><mods:role><mods:roleTerm type="text">author</mods:roleTerm></mods:role></mods:name><mods:abstract>Berbagai metode penyanggaan (ground support) telah dikembangkan pada&#13;
tambang bawah tanah. Shotcrete merupakan penyangga yang digunakan untuk&#13;
memperkuat dinding terowongan pada PT. Antam Tbk. UBPE Pongkor yang&#13;
merupakan aplikasi beton dengan cara ditembak/disemprotkan dengan bantuan&#13;
tekanan angin.&#13;
Kuat tekan shotcrete harus memenui standar yang telah ditentukan sebesar&#13;
≥ 35 MPa pada umur 28 hari. Untuk menghasilkan kuat tekan ≥ 35 MPa, perlu&#13;
dilakukan analisis material shotcrete yang digunakan dan trial mix design sampel&#13;
shotcrete untuk mendapatkan nilai kuat tekan ≥ 35 MPa. Material shotcrete yang&#13;
digunakan antara lain semen, pasir, screening, akselarator (Accelarrator&#13;
Masterroc SA 167), additive (silika fume) dan air.&#13;
Berdasarkan hasil pengujian sampel shotcrete pada 3 mix design yang&#13;
berbeda menunjukkan nilai kuat tekan yang bisa diperoleh setelah beton berumur&#13;
28 hari: sampel KSP A= 26,62 MPa, sampel KSP B= 26,50 MPa, dan sampel&#13;
KSP C= 34,65 MPa. Penulis merekomendasikan komposisi pencampuran material&#13;
shotcrete untuk aplikasi dilapangan adalah komposisi pada sampel KSP C, dengan&#13;
persentase material semen 600 Kg, pasir 1164 Kg, screening 328 kg, akselerator 8&#13;
kg, additive 20 kg dan air 250 liter untuk pembuatan 1 m3 material shotcrete.&#13;
Sehingga tebal shotcrete yang dibutuhkan untuk menyangga terowongan di lokasi&#13;
DFW Selatan Ciguha Utama Level 500 adalah 0,054 m.</mods:abstract><mods:classification authority="lcc">TN Mining engineering. Metallurgy</mods:classification><mods:originInfo><mods:dateIssued encoding="iso8601">2016-02</mods:dateIssued></mods:originInfo><mods:originInfo><mods:publisher>Universitas Negeri Padang;Teknik Pertambangan FT UNP</mods:publisher></mods:originInfo><mods:genre>Thesis</mods:genre></mets:xmlData></mets:mdWrap></mets:dmdSec><mets:amdSec ID="TMD_eprint_43720"><mets:rightsMD ID="rights_eprint_43720_mods"><mets:mdWrap MDTYPE="MODS"><mets:xmlData><mods:useAndReproduction>
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