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Budirahardjo, Elly Kusumawati
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Measuring The Infiltration Rate Of Biopore Holes Using Selection And Composittion Of Wase ( A Case Study Conducted At Campus 1 Of Ukrida Jakarta) Sanjaya, William; Christian, Kevin Billy; Gunaran, Danny; Budirahardjo, Elly Kusumawati
Teknik dan Ilmu Komputer Vol. 06 No. 22 April - Juni 2017
Publisher : Teknik dan Ilmu Komputer

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Abstract Biopore,a water conservation technique, are holes made on the earths surface that function as the entrance for rainwater into the soil. This research aims to determine the infiltration rate of biopore holes in various waste to further analyze the waste composition that affects the rate the most. Each hole infiltration rate is tested every week for 10 weeks. The result shows connection between the waste type and composition and the age of the waste. The waste used are dry leaves, meat or fish waste, and organic kitchen waste. Wet waste tends to increase the infiltration  rate (98.365%) greater than dry waste (58.06%). Meat or fish waste needs more time (four weeks) to reach maximum increase rate compared  to the other types of waste. In addition, the dominant composition of wet waste in the mixture has increased the infiltration rate. The maximum infiltration rate of biopore holes is reached between the second week and the fourth week. The surrounding environmment such as weather and soil charateristics can affect the acquired data. Keywords: biopore, infiltration rate, organic waste
Effects of Tapioca as Additive Material on The Value of Stability and Fatigue in Mixed Asphalt Christopher, Antusias; Wijaya, Hendri; Tandi, Wheryn; Budirahardjo, Elly Kusumawati
Teknik dan Ilmu Komputer Vol. 05 No. 20 Oktober - Desember 2016
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Abstrak Jalan dengan perkerasan lentur sangat dibutuhkan oleh Indonesia. Akan tetapi, ketergantungan terhadap bahan baku aspal sangat tinggi, terlebih lagi aspal merupakan bahan baku yang berasal dari minyak bumi yang terbatas jumlahnya. Saat ini upaya-upaya untuk mengurangi ketergantungan terhadap aspal mulai ditingkatkan, salah satunya dengan mengurangi kadar penggunaan aspal dan diganti dengan bahan lain. Pada penelitian ini, kadar aspal akan dikurangi dan digantikan dengan tepung kanji. Metode yang digunakan pada penelitian ini adalah dengan menambahkan tepung kanji sebanyak 5%, 8%, dan 10% dari berat kadar aspal ke campuran aspal. Tujuan dari penelitian ini adalah untuk mengetahui nilai stabilitas (stability) dan nilai kelelehan (flow) pada campuran aspal dengan tepung kanji sebagai bahan aditif. Dari data yang diperoleh, dapat disimpulkan bahwa kadar terbaik tepung kanji sebagai campuran aspal ada pada kadar 8%. Kata kunci: aspal, tepung kanji, stabilitas, kelelehan Abstract Roads with flexible pavements are in dire need in Indonesia. However, the dependence on asphalt is incredibly high.  Furthermore, asphalt is produced with one of limited natural resources, i.e. petroleum. Efforts have been made to reduce the dependence of roads on asphalt. One of them is by decreasing the asphalt ratio by replacing it with other substances. This research is carried out by substituting a certain amount of asphalt with tapioca. The purpose of this research is to obtain the stability and flow of asphalt mixture with tapioca as the additive. The obtained data concludes that the most suitable percentage of tapioca as asphalt mixture stands at 8%. Keywords: asphalt, tapioca, stability, flow 
The Efect of Limestone and Quicklime Addition to 300 Concrete Mixture Darren, Jerry Jeremia; Gunaran, Danny; ., Hendry; Budirahardjo, Elly Kusumawati
Teknik dan Ilmu Komputer vol. 05 no. 18 April - Juni 2016
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 Abstrak Beton merupakan salah satu material yang paling banyak digunakan dalam proses konstruksi. Untuk itu, perlu diusahakan adanya bahan bangunan pengikat alternatif pada adukan beton. Salah satu bahan pengikat alternatif adalah batu kapur dan kapur padam. Kedua bahan tersebut memiliki struktur kimia yang hampir sama, yaitu Ca (Kalsium) yang memiliki manfaat sebagai perekat hidrolis. Adukan beton dengan penambahan gabungan batu kapur dan kapur padam sebagai bahan aditif dibuat dengan tiga variasi, yaitu 10% (5% batu kapur, 5% kapur padam), 20% (10% batu kapur, 10% kapur padam), dan 30% (15% batu kapur, 15% kapur padam). Hasil pengujian menunjukkan bahwa beton dengan variasi 10%, 20%, dan 30% meningkatkan kuat tekan sebesar 32,8%, 11,96%, dan 24,21% dari beton normal. Kata kunci: beton, kuat tekan, batu kapur, kapur padam, aditif  Abstract Concrete is one of the most commonly used materials in the construction process. Alternative binders for mortar concrete are needed; two of the alternatives are limestone and quicklime. Both of the materials has a similar chemical structure calles Ca (Calcium) which function as hydraulic adhesives. Concrete mixtures with the addition of limestone and quicklime as additives were made of three variations, the 10% was composed  of 5% limestone and 5% quicklime, the 20% was of 10% limestone and 10% quicklime, and the 30% was of 15% limestone and 15% quicklime. The test result showed that the use of concrete with the variations of 10%, 20%, and 30% increased the compressive strength by 32,8%, 11,96%, and 24,21% of the normal concrete. Keywords: concrete, compressive strength, limestone, quicklime, additive 
Co-Authors ., Hendry Christian, Kevin Billy Christopher, Antusias Darren, Jerry Jeremia Gunaran, Danny Sanjaya, William Tandi, Wheryn Wijaya, Hendri