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Idharmahadi Adha
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TIME VARIATION EFFECT ON UNCONFINED COMPRESSIVE STRENGTH VALUE ON CLAY AND SILT STABILIZED USING CEMENT ON SOAKING CONDITION Dindha Amalia Syananta; Idharmahadi Adha; Seytanto Setyanto
Jurnal Rekayasa Sipil dan Desain Vol 4, No 1 (2016): Edisi Maret 2016
Publisher : Jurnal Rekayasa Sipil dan Desain

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Abstract

Soil in Indonesia are mostly clay and silt, which tend to be unstable, such as the soill support,compressive strength of soil and land subsidence. Unconfined Compression Test is a method thatdone in the laboratory to measure compression until the soil separates from its grains and tomeasure the soil stretch from that press. In this research to improve the quality of the soil usedmaterials like cement mixer with a variety of curing 7 days, 14 days and 28 days in order todetermine the optimum strength in clay and silt.From the effect of variations in curing time on compressive strength test values obtainedincrease in the compressive strength at the highest cement mix with a variety of curing time of 14days at 0.5927 kg /cm 2 for clay. On the silt soil increase in the compressive strength with thehighest free 14-day curing time variation of 0.5819 kg / cm2. Under optimal conditions theinfluence of a mixture of cement on clay and silt soil occurred in 9% of cement mix with a curingtime of 14 days. From the results obtained show consistent with an increase in cement content,an increase in the value of qu. With increasing curing time then the compressive strength alsoincreased.Keywords: compressive strength, cement, curing, clay, silt
Pengaruh Waktu Pemeraman Terhadap Uji Kuat Tekan Paving Block Menggunakan Campuran Tanah, Semen dan Abu Sekam Padi dengan Alat Pemadat Modifikasi ikko rasita sari; idharmahadi adha; Setyanto Setyanto
Jurnal Rekayasa Sipil dan Desain Vol 4, No 4 (2016): Edisi Desember 2016
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AbstractPaving blocks made from a mixture of portland cement or a kind of adhesive hydrolysis, water, and aggregates with or without other ingredients. In this study the process of manufacture of paving blocks will use a mix of soil, portland cement and ashes a rice husk. Moreover, curing of the paving blocks that are expected to increase the strength of paving blocks is according to SNI 03-0691-1996.Soil samples tested were from Kota Baru, South Lampung. The composition of the paving block in this study is 80% soil+15% portland cement+5% ashes a rice husk with a variety of curing time 0 day, 7 days, 14 days, 21 days and 28 days as well as to the treatment of pre-combustion and post-combustion of the sample of paving blocks. Based on the results of physical testing the original soil, USCS classify soil samples as fine-grained soil and belong to the group ML. Results from this study is the manufacture of paving blocks using silt soil, portland cement and ashes a rice husk soil material that does not meet the specifications of SNI 03-0691-1996. Ashes a rice husk does not give effect for the compressive strength of paving block and the curing time too. The longer of curing time, the compressive strength will decrease too. The highest result for the compressive strength of paving blocks post-combustion are best shown in curing time of 0 day 11,70 Mpa.Keywords: Paving blocks, silt soil, ashes a rice husk, compressive strength, curing time.
Pengujian CBR Laboratorium Mengggunakan Metode Tekanan (Pressure Method) untuk Tanah Timbunan Berdasarkan Energi Pemadatan Dwi Winda Sari; Idharmahadi Adha; ahmad zakaria
Jurnal Rekayasa Sipil dan Desain Vol 7, No 1 (2019): Edisi Maret 2019
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 In building a construction related to the physical condition of the soil, this is because the land It is one of the very material plays an important role in supporting such a construction.Then had to do the testing power support basic land (subgrade) with experimental study testing the California Bearing Ratio (CBR) method of pressure (pressure method) based on the energy compaction. The research using a sample of the soil that came from the area of Tirtayasa, Kec.Sukabumi, Bandar Lampung for land fill. Implementation testing of CBR compactor modification press tool with using three soil samples at each pressure.The pressures used for CBR standard is 0,10 MPa, 0,26 MPa and 0.58 MPa. And for testing using pressure modified CBR 0.437 MPa,1,19 MPa and 2,63 MPa. The results of the research in the laboratory showed that the weight of the maximum volume (γdmaks) of 1.68 g/cm3 of standard proctor method.While of modified proctor testing the the weight of the maximum volume (γdmaks) of 1.77 gr/cm3. Based on the results of testing the value of CBR standard and modified methods of compared that the laboratory testing higher than the CBR based on compaction energy with press modifications. Keywords : CBR, Compaction Energy Tool press the Compactor Modification 
Analysis And Planning of Bored Pile Foundation In Double Train Bridge Way Changes In Central Lampung Regency Adit Pratama Hendri; Nur Arifaini; Idharmahadi Adha
Jurnal Rekayasa Sipil dan Desain Vol 7, No 4 (2019): Edisi Desember 2019
Publisher : Jurnal Rekayasa Sipil dan Desain

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Indonesia has considerable coal reserves, but only a few or even very few can be exploited. The potential of coal owned by South Sumatra Province is known to reach around 85% of the total reserves contained in Sumatra, or around 22.24 billion tons. This means that even though mining is maximized to 50 million tons per year, coal will not be mined for 200 years. To maximize the potential of available coal, modes are needed from the train, but for now there is only one mode used to extract coal from it to transport coal from Tarahan - Tanjung Enim or vice versa. So to maximize the coal's potential, the Ministry of Transportation through the Directorate General of Railways plans to build a double track railway line between Tarahan - Tanjung Enim, one of the roads going through the river is needed a bridge to facilitate the train journey to transport the coal. The railroad bridge that was built was located in KM132 in the burial way of Central Lampung Province. In this bridge construction, the carrying capacity of the foundation needs to be analyzed so that it can withstand the burden of the upper structure and the train.From the results of the study showed that the analysis of the carrying capacity of the permit pile of 1700 kN was greater than the maximum carrying capacity that burdened the pile of 1508.93 kN so that it could be concluded that the structure under the bridge was able to withstand the load from the upper structure. Keywords: analysis, coal, bridge, carrying capacity.
Studi Kolam Retensi sebagai Upaya Pengendalian Banjir Sungai Way Simpur Kelurahan Palapa Kecamatan Tanjung Karang Pusat Florince Florince; Nur Arifaini; Idharmahadi Adha
Jurnal Rekayasa Sipil dan Desain Vol 3, No 3 (2015): Edisi September 2015
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Flood is one of the natural phenomena that cause huge losses. Population growth led to the needor increased settlements and land use changes. Rain water infiltration is reduced not only causingfloods but also droughts. Therefore, it is necessary to do environmental insightful flood control,such as retention pond. This research aims to plan and analyze the effect of making retention pondfor flood control.This research was conducted in Duana Street, Palapa Urban Village, Tanjung Karang PusatDistrict which is flowed by Way Simpur River. In this research, the hydrological analysis made ofrainfall data PH 001 Pahoman Station from 1995 to 2009. After having planned rain discharge,hydraulics analysis was executed to analyze the discharge capacity of the existing and planvolume of the storage pond. Calculations of infiltration rate were performed to calculate theabsorbed discharge. Furthermore, storage pond design plan and budget plan were made.In the analysis made, the value of planned rain discharge for 5 years return period is 5.0617m 3 /sec. Total capacity of the storage pond is 12,074.1058 m 3 . The time needed by pool fromvacant until full is 29.0202 minutes. Budget plan required in making this retention pond is Rp1,838,436,742.69. Based on the analysis performed, it was concluded that the retention pond iseffective enough to be used as one of the alternative flood control measures in urban areas.Keywords : flood, retention pond, flood control.
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