?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENGARUH+PENAMBAHAN+ABU+GUNUNG+MERAPI+SEBAGAI+STABILISATOR+PADA+TANAH+LEMPUNG+ORGANIK%0D%0A%0D%0ATHE+EFFECT+OF+ADDITION+OF+MERAPI+VOLCANIC+ASH+AS+STABILIZERS+ON+CLAY+SOIL+ORGANIC&rft.creator=YULI+YANA+EKA+SARI%2C+0615011123&rft.description=ABSTRAK%0D%0A%0D%0ATanah+tidak+lepas+kaitannya+dengan+pekerjaan+teknik+sipil%2C+suatu+kontruksi+akan+berdiri+dengan+tegak+bila+tanah+dasar+dibawahnya+cukup+kuat+untuk+mendukungnya.+Oleh+karena+itu+dibutuhkan+tanah+yang+benar-benar+stabil+agar+tanah+tersebut+mampu+mendukung+bangunan+yang+ada+di+atasnya.+Stabilisasi+tanah+adalah+perbaikan+sifat-sifat+fisik+dan+mekanis+dari+tanah+yang+kurang+baik+menjadi+tanah+yang+baik.+Pada+penelitian+ini+digunakan+bahan+stabilisasi+Abu+Gunung+Merapi+dengan+kandungan+silika+sebesar+54%2C56+%25%2C+silika+merupakan+unsur+pembentuk+utama+dalam+pembuatan+semen+yang+diharapkan+mampu+memperbaiki+sifat+fisik+dan+mekanik+dari+tanah.%0D%0AMetodelogi+pada+penelitian+ini+menggunakan+tanah+lempung+organik+yang+berasal+dari+Kecamatan+Rawa+Seragih+Lampung+Timur.+Variasi+campuran+abu+gunung+merapi+yang+digunakan+yaitu+5%25%2C+10%25%2C+15%25+dan+20%25+dengan+waktu+pemeraman+selama+14+hari+dan+perendaman+selama+4+hari.+Dari+pengujian+sifat+fisik+tanah+asli%2C+sesuai+klasifikasi+ASSTHO+sampel+tanah+masuk+pada+kelompok+A-7+(tanah+berlempung)+dan+subkelompok+A-7-5%2C+sedangkan+USCS+mengklasifikasikan+tanah+termasuk+dalam+kelompok+Organic+High+(OH).%0D%0AHasil+pengujian+ini+menunjukkan+berat+jenis+tanah+mengalami+kenaikan+pada+setiap+penambahan+kadar+abunya+sedangkan+batas-batas+Atterberg+mengalami+penurunan+setelah+distabilisasi.+Berdasarkan+hasil+pengujian+mekanis%2C+kondisi+optimum+bahan+stabilisasi+pada+kadar+10+%25+abu+gunung+merapi+berdampak+meningkatkan+nilai+CBR+pemeraman+sebesar+16%2C10+%25+dan+CBR+rendaman+6%2C2+%25.+Maka+dapat+disimpulkan+bahwa+campuran+abu+gunung+Merapi+dengan+kadar+optimum+10+%25+dapat+digunakan+sebagai+subgrade+karena+nilai+CBRnya+%E2%89%A5+6+%25.%0D%0AKata+kunci+%3A+stabilisasi%2C+abu+gunung+Merapi%2C+tanah+organik%2C+CBR.%0D%0AABSTRACT%0D%0A%0D%0AThe+main+problem+on+soil+in+civil+engineering+work%2C+that+bearing+capacity+has+not+enough+to+support+the+constructions.+It+needs+the+subgrade+soil+which+completely+stable.+There+is+one+soil+stabilization+method+that+suitable+to+get+increase+the+soil+properties+which+that+effort+to+use+as+a+subgrade+whitin+the+requirement+structure.+This+research+try+to+using+Merapi+volcanic+ash+as+a+stabilizing+agent.+Merapi+volcanic+ash+content+of+silica+content+of+54.56%25.+It+has+a+similiar+of+material+to+produce+cement+which+expected+to+improve+the+physical+and+mechanism+properties+of+the+soil.%0D%0AThe+methodology+of+this+research+has+conducted+to+use+some+soil+which+derived+from+Rawa+Seragih%2C+East+Lampung.+Variations+of+volcanic+ash+that+used+on+this+mixture+was+about+5%25%2C+10%25%2C+15%25+and+20%25+combining+with+curing+time+for+14+days%2C+and+soaking+for+4+days.+Based+on+the+physical+properties+of+soil%2C+AASTHO+was+classified+it+in+the+A-7+(clay+soil)+and+subgroup+A-7-5%2C+while+USCS+classified+shown+that+include+the+symbol+of+OH.%0D%0AThe+results+of+this+research+has+shown+that+specific+gravity+has+increased+and+Atterberg+limits+decreased+after+stabilization.+Based+on+the+results+of+mechanical+testing%2C+the+optimum+condition+of+stablization+agent+at+10%25+of+Merapi+voclanic+ash+has+impact+to+increase+CBR+unsoaked+was+16.10%25+and+6.2%25+of+CBR+soaked.+It+was+conclude+that+the+Merapi+volcanic+ash+has+optimum+content+of+10%25+can+be+used+as+a+subgrade+because+the+value+of+CBR+%E2%89%A5+6%25.+Keywords%3A+stabilization%2C+Merapi+volcanic+ash%2C+organic+soil%2C+CBR.&rft.publisher=FAKULTAS+TEKNIK&rft.date=2013-05-01&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F1%2Fabstrak.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F2%2FCover.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F3%2FDaftar%2520Gambar%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F4%2FDaftar%2520Isi%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F5%2FDaftar%2520Riwayat%2520Hidup.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F6%2FDaftar%2520Tabel%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F7%2FLembar%2520pengesahan.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F8%2FSanwacana.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F9%2FbabI%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F10%2FbabII%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F11%2FbabIII%2520.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F5738%2F12%2FbabIV%2520.pdf&rft.format=text&rft.iden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