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PENGARUH DURABILITAS TERHADAP DAYA DUKUNG STABILISASI TANAH MENGGUNAKAN LEMPUNG PLASTISITAS RENDAH DENGAN KAPUR Idharmahadi Adha
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 13, No 3 (2009): Edisi Desember Tahun 2009
Publisher : UNIVERSITAS LAMPUNG

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Abstract

Structure pavement in highway engineering which applicated soil stabilization method as basecourse, floating of water was a problem must be controlled. Lime is one of natural material couldbe used as additive in soil stabilization. Lime will reduce soil plasticity, increase strength anddurability, decrease water absorption ang swelling soils. To design. soil lime stabilization as basecourse, will be used clay material in low plasticity. To know influence of durability for floating ofwater in laboratory test is used by cycle periodic. Based on research that bearing capacity ofsoil lime base, the value of CBR laboratory at fourth cycle is 98 % (less than 100 %). By thiscondition, if soil lime base construction wiil be floating by water every year in rainy seasion, atfourth year, soil lime base could not accomplish technical spesifications., minimize of CBR valueis 100 %. The conclusion is floating of water will decrease bearing capacity of soil lime base andincrease soil plasticity properties
Pengaruh Penambahan Pasir dan Semen Terhadap Kuat Tekan Paving Block Material Tanah Menggunakan Alat Pemadat Modifikasi Idharmahadi Adha; Setyanto Setyanto; Annisa Wulansari
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 20, No 2 (2016): Edisi Agustus 2016
Publisher : UNIVERSITAS LAMPUNG

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Paving blocks made from mixture of portland cement or other hydrolysis adhesive, water, and ag- gregates with or without other materials. In this study, paving blocks are made by using a mixture of soil, portland cement and sand. In the manufacture of paving blocks used compactor modifica- tion that are expected to increase the strength of paving blocks that according to SNI 03-0691- 1996. Soil samples tested were from Kota Baru, South Lampung. The variation of mixture that used in this study is by adding sand as much as 2%, 4%, 6%, 8%, and 10% and add cement as much as 3%, 6%, 9%, 12%, dan 15% as well as with the treatment of pre-combustion and post- combustion of the sample of paving blocks. Results of testing the compressive strength of the paving blocks with a mixture of soil , cement and sand has meet the standard of SNI 03-0691-1996 for the classification of paving blocks quality D which can be used for garden. The combustion process of paving blocks is giving only slightly against the increase in paving blocks without the process of combustion. The highest compressive strength value generated by post-combustion of paving blocks on the variation of mixture 10 % sand + 15 % cement + 75 % soil amounted to 10.05 MPa . While the value of the water absorp- tion test ranged from 16.6 % - 23.8 % so it does not meet the standard of SNI 03-0691-1996 .
Studi Pengaruh Penambahan Bahan Additive TX-300 Terhadap Kuat Tekan Batu Bata Pasca Pembakaran Alhadi Pratama Bintang; Setyanto Setyanto; Idharmahadi Adha
Jurnal Rekayasa Sipil dan Desain Vol 3, No 3 (2015): Edisi September 2015
Publisher : Jurnal Rekayasa Sipil dan Desain

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Along with the rise of civil construction such as housing or settlements, also increase the demandfor bricks. To be able to meet the needs of these bricks, brick production must be increased. Notonly an increase in production should be done, but the increase in terms of quantity and in termsof quality also needs to be done. One way to do is to add an additional mixture to the compositionof the brickyardIn this study used clay and additional materials TX-300 which has a variety of levels of 0.6 ml, 0.9ml, 1.2 ml and 1.5 ml with the purpose to improving the quality of the bricks, as well as comparingstrong press bricks by modifying the combustion time. Soil samples tested in this study is claywhich derived from Nyunyai street, Rajabasa, Bandar Lampung. Variations of burning time is usedfor one day, two days and three days.After doing research, from the fourth level, the compressive strength maximum average post-combustion bricks are at a level of 1.5 ml with a burning for two days. The compressive strengthvalue of 46.01 kg / cm2. This is due to the greater levels of TX-300, the greater the compressivestrength value, besides the most optimum burning time is for 2 days, this was due to theevaporation of water contained in the most optimum bricks are burning for two days.Keywords: Bricks, Clay, TX-300, Compressive Strenght
Analisis Tundaan Akibat Penutupan Palang Pintu Kereta Api (Studi Kasus Segmen Ruas Jalan Simpang Urip Sumaharjo - Kimaja) reni sari; dwi herianto; idharmahadi adha
Jurnal Rekayasa Sipil dan Desain Vol 4, No 4 (2016): Edisi Desember 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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Perlintasan yang terbentuk dari pertemuan antara dua jenis prasarana transportasi yaitu jalan raya dengan jalan rel merupakan bentuk pertemuan yang sering menimbulkan tundaan, seperti pada perlintasan di jalan urip sumaharjo ini merupakan jalan dengan tipe jalan 2 lajur 2 arah yang sering terjadi kemacetan akibat penutupan palang pintu kereta api, dengan analisis di maksudkan untuk memberi masukan semua pihak yang terkait, sehingga jalan tersebut tidak terjadi kemacetan. penelitian ini bertujuan untuk menganalisis tundaan dan panjang antrian kendaraan pada masing-masing lajur yang terjadi akibat penutupan pintu perlintasan kereta api, Metode yang digunakan adalah metode survei. Hasil analisis menunjukan akibat penutupan palang pintu kereta api di jalan urip sumaharjo maka akan terjadi kemacetan yang cukup besar akibat adanya weaving atau jalinan di jalan tersebut. Sehingga sudah saatnya pada perlintasan dibangun underpass.Kata kunci : Tundaan, Panjang Antrian, Penutupan palang pintu kereta api, weaving
Perencanaan Dinding Penahan Sebagai Alternatif Pencegah Bahaya Longsor Pada Konstruksi Pangkal Jembatan Hatwan Fardilla; Idharmahadi Adha; Nur Arifaini
Jurnal Rekayasa Sipil dan Desain Vol 6, No 1 (2018): Edisi Maret 2018
Publisher : Jurnal Rekayasa Sipil dan Desain

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Jembatan adalah prasarana sipil yang membentang di atas aliran sungai dan secara topografi tidak rata. Perbedaan elavasi dari daratan yang dilewati sungai ini membentuk suatu lereng. Bencana yang sering terjadi pada permukaan tanah yang tidak rata atau curam adalah longsor. Kondisi lereng dengan kemiringan yang curam dan menahan beban yang besar dapat mengakibatkan longsor. Oleh karena itu diperlukan dinding penahan untuk menjaga kestabilan lereng agar tidak terjadi penurunan sehingga jembatan tetp aman dari bahaya longsor. Penelitian ini bertujuan untuk merencanakan dinding penahan dalam perlindungan pangkal jembatan dari bahaya longsor.Dalam penelitian ini letak dinding penahan sesuai dengan data gambar rencana. Kemudian dilakukan analisis geoteknik dengan dimensi dinding yang direncakan, dari data tanah dan data beban dapat diperoleh tekanan tanah yang terjdai. Melalui analisis geoteknik didapatkan nilai stabilitas dinding penahan tanah berupa nilai keamanan terhadap guling,geser dan daya dukung tanah hingga dimensi yang dipakai aman. Selanjutnya dilakukan perhitungan struktur penulangan dinding penahan tanah dan diperoleh gambar rencana dari dinding penahan tanah. Dimensi dinding penahan tanah yang direncakan adalah sebesar 0,3 m untuk lebar mercu, panjang kaki 2,4 m, tebal kaki 0,5 m dengan tinggi dinding 5 m. Berdasarkan analisis stabilitas dinding yang dilakukan, disimpulkan dinding aman dari bahaya guling, geser, serta aman dalam perhitungan daya dukung tanah sehingga dinding mampu menjadi salah satu alternatif upaya pencegah bahaya longsor.
Analisis Desain Pondasi Rakit untuk Bangunan Bertingkat dengan Metode Konvensional Dhyna Annisa Maghfira Bahagianda; Setyanto Setyanto; Idharmahadi Adha
Jurnal Rekayasa Sipil dan Desain Vol 5, No 2 (2017): Edisi Juni 2017
Publisher : Jurnal Rekayasa Sipil dan Desain

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The foundation of the building is usually divided into two parts: shallow foundation and deep foundation, depending on the location of hard soil and the depth ratio with the width of the foundation (D ≤ B). The foundation of this raft serves to mediate the surface of one or more columns within several lines or paths with the ground. The use of the raft foundation is used when the decline is a problem eg in soft soil. The foundation of raft becomes alternative choice seen from external factor that is implementation process which do not give impact to surrounding environment or building around it. In this study conducted data collection obtained from the results of laboratory tests in the form of data sondir results, SPT results and data in the form of load structures and field load tests and building analysis load. From the laboratory results and the subsequent building load, the calculation of the force field with the SAP 2000 program, calculate the maximum carrying capacity of the raft foundation under review, calculate the decline of the raft foundation and obtain the result of the structural requirements of the raft foundation. Based on the results of the analysis in this study found the carrying capacity of soil for raft foundation of 907.643 kN/m2. While the maximum voltage distribution at the base of the raft foundation due to the load and moment is 38.0696 kN/m2.  Keywords: Raft Foundation, Bearing Capacity, Reinforcement
Studi Kuat Tekan Batu Bata Menggunakan Bahan Additive (Abu Sekam Padi, Abu Ampas Tebu dan Fly Ash) Berdasarkan Spesifikasi Standar Nasional Indonesia (SNI) Abdurrohmansyah Abdurrohmansyah; Idharmahadi Adha; Hadi Ali
Jurnal Rekayasa Sipil dan Desain Vol 3, No 3 (2015): Edisi September 2015
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Brick is one of construction materials of building, shopping complex, real estate etc. Brick is madefrom the mixing of soil and water. In this study, the process of brick production will be tired by mixthe soil with additive materials such as rice husk ash, baggase ash and fly ash. It’s to know howbig the advantage of those additive materials and to compare the compressive strength betweenconventional brick and the brick that have mixed with rice husk ash, baggase ash and fly ash toget Indonesian National Standard for the strong and durable brick.Clay was used as the soil sample in this study. The clay is from Yoso Mulyo Village, Metro. Theadditive materials such as, rice husk ash is from Yoso Mulyo Village Metro, baggase ash is fromPT Indo Lampung Perkasa and the fly ash is from PLTU Tarahan.The result of this study show that the production of brick after burned using additive materialssuch as rice husk ash, baggase ash and fly ash, increase the compressive strength value. So, thestrength of the brick is good enough fulfilled the standard of Indonesian National StandardInstitution.Keywords: Brick, additive fly ash and rice husk ash, baggase ash, compressive strength
ANALISIS PERMEABILITAS TANAH YANG DIPADATKAN DENGAN MENGGUNAKAN METODA CUBIC PERMEAMETER Mohammad Yogi Alnasir; Lusmeilia Afriani; Idharmahadi Adha
Jurnal Rekayasa Sipil dan Desain Vol 8, No 1 (2020): Edisi Maret 2020
Publisher : Jurnal Rekayasa Sipil dan Desain

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AbstractThe development of infrastructure in Indonesia is increasing in various regions such as the construction of reservoirs, dams and other construction. One of the important things that became the basis of development is foundation ground. Therefore, it is necessary to know the type of soil used and the permeable nature of the soil. Soil permeability illustrates the ability of soil to pass water. In this study to determine the permeability of the soil by using a cubic mold and compare the results of soil permeability obtained from compacted soil using the pressure method and the standard method. Soil samples used were from Pamenang village, Pringsewu. Soil taken is disturbed and undisturbed soil samples. The soil was then compacted by a standard method and with a pressure test method at a pressure of 5 MPa, 10 MPa and 15 MPa. Then the permeability test is carried out to get the permeability coefficient. The results of observations in the laboratory show the greater pressure applied to the soil, the smaller coefficient of permeability. The relationship between the permeability coefficient with standard compaction method and the pressure method get the permeability coefficient value so that the pressure is between 5 to 10 MPa. Keywords: Soil, Compaction, Pressure and Permeability. AbstrakPerkembangan pembangunan infrastruktur di Indonesia sedang meningkat diberbagai daerah seperti pembangunan waduk, embung, bendungan dan konstruksi lainnya. Salah satu hal penting yang menjadi dasar dalam pembangunan adalah pondasi tanah. Oleh karena itu, perlu mengetahui jenis tanah yang dipakai dan sifat permeable tanah tersebut. Permeabilitas tanah menggambarkan kemampuan tanah dalam meloloskan air. Pada penelitian ini untuk mengetahui permeabilitas tanah dengan menggunakan mold segiempat dan membandingkan hasil permeabilitas tanah yang didapatkan dari tanah yang dipadatkan menggunakan metode tekanan dan secara metode standar. Sampel tanah yang digunakan berupa sampel tanah yang berasal dari desa Pamenang, Pringsewu. Tanah yang diambil merupakan sampel tanah yang terganggu dan sampel tanah tak terganggu. Tanah tersebut selanjutnya dipadatkan dengan metode standar dan dengan alat uji metode tekanan pada tekanan 5 MPa, 10 MPa, dan 15 MPa. Selanjutnya dilakukan pengujian permeabilitas untuk mendapatkan nilai koefisien permeabilitasnya. Hasil dari pengamatan di laboratorium menunjukan semakin besar tekanan yang diberikan pada tanah maka semakin kecil koefisien permeabilitasnya. Hubungan koefisien permeabilitas dengan metode pemadatan standar dan metode tekanan memperoleh nilai koefisien permeabilitas sehingga tekanan berada diantara nilai 5 sampai 10 MPa.  Kata kunci: Tanah, Pemadatan, Tekanan dan Permeabilitas.
Komparasi Kadar Daya Dukung Tanah Berbutir Halus Berdasarkan Uji CBR Menggunakan Alat Tekan Modifikasi dan Modified Proctor Amelia Nurul Damayanti; Idharmahadi Adha; Ahmad Zakaria
Jurnal Rekayasa Sipil dan Desain Vol 8, No 4 (2020): Edisi Desember 2020
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

The importance of soil as construction material needs to be considered carefully. With various soil conditions, a physical test is required to discover the characteristics of the soil and California Bearing Ratio (CBR) test in a laboratory to determine the bearing capacity of the basic land (subgrade). This research was conducted to assess the suitability of the CBR test value with two different compaction tools. The results of this study showed that the soils were classified into A-6 clay soil type. On the modified proctor compaction test, the maximum weight volume (γdmaks) was 1,70 gr/cm3, while the compaction with modified press tool obtained 1,75 gr/cm3. Based on the results of the values obtained from CBR standard test is 11,5% and 1,32% for the soaked sample .While the CBR value without immersion with modified press tool are 7,7% for 3 MPa, 16,2% for 6 MPa, 19,5% for 9 MPa, 20,5% for 12 Mpa. For the soaked samples are 1,53% for 3 Mpa, 2,7% for 6 Mpa, 3,56% for 9 Mpa, and 4,33% for 12 Mpa. In conclusion, the CBR value escalation is higher when using the modified pressure tool compared with the CBR standard method.
Pengaruh Waktu Pemeraman Terhadap Uji Kuat Tekan Paving Blok Menggunakan Campuran Tanah dan Kapur dengan Alat Pemadatan Modifikasi Martha Helmahera; Setyanto Setyanto; Idharmahadi Adha
Jurnal Rekayasa Sipil dan Desain Vol 4, No 1 (2016): Edisi Maret 2016
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Paving block is smaller segments made of concrete with rectangular or square shape many ofwhich have good compressive strength properties, has good compressive strength properties, canwithstand the load in some extent, and easy installation work. Paving blocks made from a mixtureof portland cement or a kind of adhesive hydrolysis, water, and aggregates with or without otheringredients. In this study the process of manufacture of paving blocks will use a mix of soil andlimestone. Moreover, curing of the paving blocks that are expected to increase the strength ofpaving blocks is according to SNI 03-0691-1996. Soil samples tested were from Kota Baru, SouthLampung. The composition of the soil mix and chalk with a variety of curing time 7 days, 14 days,21 days and 28 days as well as to the treatment of pre-combustion and post-combustion of thesample of paving blocks. Based on the results of physical testing the original soil, USCS classifysoil samples as fine-grained soil and belong to the group ML. Results from this study is themanufacture of paving blocks using silt soil and chalk soil material that does not meet thespecifications of SNI 03-0691-1996. For the compressive strength of paving blocks pre-combustion and post-combustion are best shown in curing time of 28 days. The compressivestrength that generated as a whole still does not meet the specifications of the paving block SKSNI 03-0691-1996 that is a minimum compressive strength at 85 kg / cm 2 . As well as the waterabsorption the test value not meet the specifications of the paving block SK SNI - 03 - 0691- 1996is around 3% - 10%.Keywords: Paving blocks, silt soil, compressive strength, soil combustion
Co-Authors Abdurrohmansyah Abdurrohmansyah Adira Salsabila Adit Pratama Hendri Ahmad Zakaria Alhadi Pratama Bintang Amelia Nurul Damayanti Annisa Tiara Rulya Annisa Wulansari Astri Novalia Dhyna Annisa Maghfira Bahagianda Dindha Amalia Syananta Dwi Herianto Dwi Winda Sari Elisa Rahmawati Dewi Eria Zundi Rahmadani Feby Aristia Putri Florince Florince Hadi Ali Hatwan Fardilla ikko rasita sari Lusmeilia Afriani M Thata Dinata Martha Helmahera meifra wahyudi Mohammad Yogi Alnasir Muhammad Naufal Agatha Mutiara Prestika Nur Arifaini Ofik Taufik Purwadi Ofik Taufik Purwadi Prasetio Putro Prabowo R. NOFAN HENDRA ADYAKSA Ratih Diah Permani reni sari rifan wiguna Septian Adi Saputra Setyanto Setyanto Seytanto Setyanto Siti Zahhara Ulfa Tuti Alawiya Wenny Dwi Tiara Ayu Syaputri Yohanes Martono Hadi