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PENGARUH WAKTU PEMERAMAN TERHADAP KEKUATAN PAVING BLOCK PASCA PEMBAKARAN MENGGUNAKAN MATERIAL TANAH DAN KAPUR UNTUK JALAN LINGKUNGAN Andius Dasa Putra; Setyanto Setyanto; Onika Permata Sari
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 3 (2014): Edisi Desember 2014
Publisher : UNIVERSITAS LAMPUNG

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Abstract

Infrastructure rapid development sometimes had negative impact, such as the use of impermeable pavement layers which result the infiltration be hampered. By utilizing the paving block, it can resolve o f infrastuture development problem. Known, paving block is composition of building materials that made from the mixture of portland cement or hydraulic adhesives, water, and agrregates with or without the other ingridient as defined in SNI 03-0691-19996. To find the other alternatives then will do the assesment with the limestone and soil. Soil samples were tested from Desa Karang Anyar, South Lampung. The composition of mixture was used 6 %, 8 % and 10 %, with curing time during 7, 14 and 28 days, and the treatment with or without combustion and then paving block were tested with compressive strength and water absorption. The research results obtained by the characteristics of the soil is a clay samples. The average value of compressive strength was linearly proportional to the amount of lime composition. The compressive strength during 28 days of curring time and without combustion was from 32,96 kg/cm2 to 10,87 kg/cm2, then the compressive strength with combustion was from 16,99 kg/cm2 to 56,91 kg/cm. Water absorption test value was inversely proportional to the amount of lime composition. The water absorption was from 10,07% to 15,07%. The compressive strength resulting over all still not include the specifications of paving block in SK - SNI 03-1996, also for the compressive strength was 85 kg/cm2. The value of water absorption test were not include the specifications of paving block SK SNI - 03 - 0691-1996 which ranges from 3 % - 10 %.
KAJIAN NILAI PCN RUNWAY BERDASAR METODE ANALITIK DAN METODE TEORITIK DI BANDARA H. ASAN SAMPIT Andius Dasa Putra
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 14, No 2 (2010): Edisi Agustus Tahun 2010
Publisher : UNIVERSITAS LAMPUNG

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Abstract

Implementation of air traffic safety is shown from good operation and free from activity which against the law. This statement has declared on Government Regulation about Air Traffic Safety in Indonesia. Analysis of Pavement Classification Number (PCN) value is the one of air traffic safety requirement. Due to that statement, this research try to evaluation and analysis about performance of runway based on analytical method and theoritical method using data from HWD (Heavy Weight Deflectometer) test. The result of performance runway will shown on PCN value.HWD tests are routinely conducted at the FAA to evaluate performance of pavemnet. HWD tests are conducted in two phases.In the first phase, HWD geophone sensors record vertical deflections at seven points on thepavement surface. The collected data are used for pavement evaluation and environment related thickness response analysis. In the second phase, the insitu pavement sensors record the pavement response while the HWD geophones record the defections on the pavement surface. These tests are conducted by placing the HWD load plate directly over the in situ deflection and strain sensors. One of the objectives of the HWD tests is to develop relationships between the applied load and measured deflections.The result of this research has shown that PCN value from analytical method is 9/F/A/X/T and theoritical method is 38/F/D/X/T. Code letter A or D on PCN value is describe about class of bearing capacity of subgrade. That difference of code letter bearing capacity due to HWD test directly collecting data of subgrade reaction under the pavement but the other method has taken data of subgrade from sample outside of runway . Increasing of bearing capacity of subgrade cause process of compaction on subgrade under the pavement has perfectly done.
PENGARUH WAKTU PEMERAMAN TERHADAP DAYA DUKUNG STABILISASI TANAH LEMPUNG BERPASIR MENGGUNAKAN TX-300 Andius Dasa Putra; Iswan Iswan; S Effendy
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 18, No 3 (2014): Edisi Desember 2014
Publisher : UNIVERSITAS LAMPUNG

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Abstract

Road is one of many things that support the development of construction at citties and villages. Not every soil can be directly used for road construction. Soil conditions in one area will not have the same soil properties with the other area. Some has a good bearing capacity and there’s also some with poor soil bearing capacity. This thing is very influenced by the type of the soil, so that on constructionis is requred a deeper understanding of the soil behavior analytically. In this research, the tested soil is study clay soil that diviced from Dusun kali ayu, Desa jadti baru, Kecamatan tanjung bintang, Kabupaten Lampung Selatan-Provinsi Lampung had been optimized with TX-300 with density of 2.49, water contents of 22.34 percent, 41.08 percent Liquit Limit, plastic limit of 31.92 percent and plasticity index of 9.15 percent. Mixed content of TX-300 that used was 1.2 ml and 6 kg soil sample for 0,7,14 and 28 day with unsoaked method. On physical examination like density and liquit limit increased after stabilized. While the mechanical examination, TX-300 is quite effective in increasing the bearing capacity along with the increasing of curing duration from 21.69% up to 25.92% in 28 days curing time. From CBR test result without soaking , the soil that has stabilized with TX-300 has a less effect in increasing the bearing capacity of the sandy clay soil compared with of stabilizing on soft clay soil.
Hubungan Nilai CBR Laboratorium dengan Pemadatan Modified dan Nilai Dynamic Cone Pentrometer (DCP) di Lapangan Riant Pandu Pratomo; Andius Dasa Putra; Rahayu Sulistyorini; Lusmeilia Afriani
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Tanah merupakan salah satu bagian penting dalam pekerjaan konstruksi teknik sipil. Kekuatan tanah dasar sangat penting guna menopang beban konstruksi. Beberapa cara untuk mengestimasi nilai CBR adalah dengan soil grading dan data plastisitas tanah. Namun pada kenyataannya di lapangan, banyak kendala yang dihadapi maka seringkali dilakukan uji DCP (Dynamic Cone Penetrometer). Penelitian ini dilakukan untuk mengetahui persamaan hubungan antara CBR laboratorium dan DCP serta perbandingannya dengan persamaan SNI. Penelitian dilakukan dengan menguji tanah di Teluk Ratai Kabupaten Pesawaran pada tiga titik dengan pengujian CBR laboratorium (Unsoaked), DCP mould, dan DCP lapangan. Sampel tanah dipadatkan dengan variasi pemadatan 10, 25, dan 56 tumbukan dan kadar air optimum sebesar 22,95% yang didapat dari uji pemadatan dengan proctor modified. Hasil penelitian menunjukkan persamaan korelasi CBR Laboratorium dengan gd adalah y = 30,878x – 26,98 dengan korelasi persamaan CBR dan DCP didapat Log (CBR) = 2,26557 – 0,807 Log (DCP). Bila dibandingkan dengan nilai CBR hasil persamaan CBR SNI, nilai CBR dari persamaan CBR dan DCP memiliki nilai yang lebih tinggi. Kata kunci : tanah, daya dukung, CBR laboratorium, DCP lapangan.
Perbandingan Nilai Derajat Kepadatan Tanah Metode Standard Proctor dengan Alat Uji Tekan Modikasi dan Uji Sand Cone di Lapangan Novan Adenora; Lusmeilia Afriani; Iswan .; Andius Dasa Putra
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Perkembangan teknologi dalam pengujian pemadatan menginspirasi Teknik Sipil Universitas Lampung untuk membuat prototipe alat uji tekan modifikasi yang dapat diatur tekanannya. Cara kerja dengan alat ini yaitu dengan menggunakan nilai kadar air optimum yang didapatkan melalui uji pemadatan standard proctor. Dengan nilai kadar air tersebut lalu digunakan untuk menguji sampel dengan tekanan yang berbeda yaitu 5 Mpa, 10 Mpa, dan 15 Mpa.  Penelitian dilakukan dengan tujuan untuk membandingkan uji pemadatan metode standard Proctor, dan uji pemadatan dengan alat tekan modifikasi serta uji sand cone dilapangan untuk mendapatkan nilai derajat kepadatan. Pada uji pemadatan dengan metode standard proctor didapat berat volume kering maksimum sebesar 1,42 gr/cm3 dan nilai kadar air optimum sebesar 24,05 %. Uji pemadatan tanah menggunakan metode tekan didapat berat volume kering terbesar pada tekanan 15 Mpa yaitu sebesar 1,58 gr/cm3. Dan dari uji sand cone didapat nilai derajat kepadatan tanah dari uji standard proctor dan uji menggunakan alat tekan modifikasi terdapat perbedaan antara 7,78 % sampai 10,2 %.
Perubahan Perilaku Tanah Lempung Lunak Akibat Stabilisasi dengan Bahan Aditif Kapur menggunkaan Metode Deep Soil Mixing Pola Triangular Beno Balakosa Pangestu; Iswan Iswan; Andius Dasa Putra
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Pelembapang, South Lampung has a soft clay soil structure. Soft clay soil has a low bearing capacity value This has an effect on the building to be built on it. Therefore, soil stabilization must be carried out. The method used in this study is the deep soil mixing (DSM) method, which is one of the soil improvement method by mixing additional materials in the field (in-site). This method is more affordable because they use their soil as theiraggregate and reduce the transportation budget because of stuff supply.The purpose of this study is to determine the change of soil load-bearing capacity due to the variation of distance and the diameter of the DSM stabilization column on soft clay soil and soft clay soil with 8% lime. This study shows that the stabilization of soft clay soil using DSM of 8% lime with triangular configuration has increased its load-bearing capacity (qu) from10.368 kg/cm2 to 12.96 kg/cm2. The increase of soil load-bearing capacity with the stabilization of the DSM column is proportional to the volume of soil improvement. The largest increase of the soil load-bearing capacity occurred in 1D columns range and 3.75 cm diameter. The distance variation also gives a more significant change compared to the variation of diameter. The most efficient distance and diameter are at the variation of the distance of 1.25D columns range and 2.5 cm diameter.
Pengaruh Penambahan Semen pada Tanah Lempung terhadap Parameter Konsolidasi dan Kecepatan Penurunan Fara Dwitya; Andius Dasa Putra; I Iswan
Jurnal Rekayasa Sipil dan Desain Vol 9, No 2 (2021): Edisi Juni 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Soil is a subgrade for basic building construction. While receiving the load, soil will settle, which take long time to complete for soft clays because of its low permeability. The problem that is caused by settlement as seen in Palembapang, Umbul Ligoh, South Lampung has low bearing capacity, this leads to cracks in the house walls, bumpy roads, and the settlement of the road constructions. One of the soil stabilization effort is addingcement as an additive material because it has very fine particles so that it can fill the soil pores and bond to the contact area between the soil grains and has a function as a strong binder. This work aimed to study the parameters of the compression index (Cc), coefficient of consolidation (Cv), consolidation settlement (Sc) and time of consolidation (t) due to soft clay mixing with cement as a soil stabilization material with percentage of 4%, 8% and 12%. Due to cement addition into soft clay, compaction with the standard proctor experienced a decrease the optimum moisture content (OMC) and an increase in the weight of maximum dry volume. In addition, in the consolidation test, the compression index (Cc) and consolidation settlement (Sc) decreased 7,95% and 5,44%, moreover the coefficient consolidation (Cv) increase 2,74% and the time of consolidation (t) were faster. The most change on consolidation parameter was recorded by the sample mixed with 12% of cement.
Pengujian CBR Laboratorium Lapisan Subgrade Menggunakan Alat Uji Modifikasi Metode Tekan (Pressure Method) Alma Sulton Auliyak; Andius Dasa Putra; Ofik Taufik Purwadi; Iswan .
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Provinsi Lampung merupakan gerbang Pulau Sumatera, sehingga pembangunan infrastruktur saat ini semakin berkembang pesat. Pembangunan konstruksi tersebut sangat erat berkaitan dengan daya dukung tanah karena tanah merupakan material yang berperanan penting dalam menopang suatu konstruksi. Untuk mengetahui kekuatan daya dukung tanah yang baik maka dilakukan pengujian CBR. Sampel tanah yang dipakai diambil dari daerah Tirtayasa, Sukabumi, Bandar Lampung. Terdiri dari sampel CBR proctor standar dan modified tanpa rendaman, dan CBR tekanan sebesar 5 MPa, 10 MPa, 15 MPa menggunakan tiga sampel tanah pada masing-masing tekanan. Dari hasil penelitian di laboratorium menunjukkan bahwa hasil CBR proctor tanpa rendaman standar dan modified yaitu sebesar 3,3% dan 5,8%. Sementara nilai CBR tekanan tanpa rendaman standar 5 MPa, 10 MPa, 15 Mpa yaitu sebesar 2,6%, 3,8%, 5,8%, serta CBR tekanan tanpa rendaman modified yaitu sebesar 5%, 6%, 8,3%. Dari hasil tersebut nilai CBR proctor baik standar maupun modified berada di antara tekanan 5 MPa dan 10 Mpa.
Pengujian Permeabilitas Tanah Yang Dipadatkan Dengan Metode Modified Proctor Cubic Permeameter Agil Julianto; Lusmeilia Afriani; Iswan .; Andius Dasa Putra
Jurnal Rekayasa Sipil dan Desain Vol 9, No 4 (2021): Edisi Desember 2021
Publisher : Jurnal Rekayasa Sipil dan Desain

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Beberapa tahun terakhir, Indonesia sebagai negara berkembang makin gencar melaksanakan pemerataan pembangunan infrastruktur, salah satunya adalah infrastruktur sumber daya air.Salah satu hal penting yang menjadi dasar pembangunan bangunan air adalah kekuatan pondasi yang dibangun, termasuk jenis tanah yang dipakai dan sifat lolos air (permeabel) tanah tersebut. Umumnya, uji permeabilitas dilakukan menggunakan mold dengan model silinder. Pada penelitian ini, dilakukan uji permeabilitas tanah yang dipadatkan dengan modified proctor serta alat tekan modifikasi pada mold berbentuk kubus (cubic permeameter), bertujuan untukmengetahui nilai permeabilitas tanah dengan menggunakan mold segi empat dan membandingkan nilai permeabilitas tanah dari alat pressure method dan modified proctor method, serta mengetahui korelasi antara kepadatan tanah dengan nilai koefisien permeabilitas tanah. Sampel tanah yang digunakan berasal dari desa Pamenang, Pringsewu. Tanah tersebut selanjutnya dipadatkan dengan metode modifieddan dengan alat uji metode tekanan pada tekanan 5 MPa, 10 MPa, dan 15 MPa. Hasil dari pengamatan di laboratorium menunjukkan semakin besar tekanan yang diberikan pada tanah maka semakin kecil koefisien permeabilitasnya. Hubungan koefisien permeabilitas dengan metode pemadatan modifieddan metode tekanan memperoleh nilai koefisien permeabilitas sehingga tekanan berada diantara nilai 5 dan 10 MPa, yaitu di angka 7,52 MPa