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EDUKASI PORTABLE AND ECO-FRIENDLY OF GABION (POLYGON) KOMBINASI CANGKANG KERANG DAN BATU SEBAGAI PENGENDALI EROSI SUNGAI [PORTABLE AND ECO-FRIENDLY OF GABION (POLYGON) EDUCATION, THE COMBINATION OF SHELLFISH AND STONE FOR CONTROL RIVER EROSION]

Jurnal Sinergitas PKM & CSR Vol 3, No 1 (2018): JURNAL SINERGITAS PkM & CSR
Publisher : Universitas Pelita Harapan

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Abstract

Uncontrolled erosion will endanger the people on the banks of the river. One of the bad consequences is the land down and the landslides, as happened in the Lubuk Lande River, Teratak Buluh Village. This river is located on the edge of Lubuk Street, initially the Lubuk road has a width of 3.5 m, the road gradually narrows to 3 m wide. Therefore, Community Service (PKM) activities are needed, in order to develop knowledge, skills, optimize natural resources and waste by making portable and eco-friendly of Gabion (polygon). Polygon is an innovation of making gabion using waste shellfish, river stones and vetiver plants as a controller of river erosion. Polygon is designed with a beam shape with 3 frames, the first frame is filled with river stone material, the second frame is filled with a mixture of stone and shells, and the third frame is filled with shellfishs and vetiver plants. polygon is placed on the side of the river which often experiences erosion, namely the river turn area. This PKM activity was carried out for two days with the community and cadres. The first day was an educational activity, while the second day was the implementation of polygon. The results of this activity indicate an increase in community knowledge and contributions about controlling river erosion.Keywords: river erosion, polygon, shellfish, stone, vetiver

Pengaruh Gradasi Agregat Kasar Lempung Bakar pada Beton Ringan

Jurnal Teknobiologi Vol 4, No 2 (2013)
Publisher : Jurnal Teknobiologi

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Abstract

Coarse aggregate from burned clay is an alternative for lightweight structuralmembers in area that has abundant source of clay. The aggregates were made byshaping clay to round aggregates and baking them at furnace. There were four sizevariation of coarse aggregates, namely 25-4.75, 19-4.75, 12.5-4.75 and 9.5-2.36mm. Research shows that burned clay produced lightweight concrete with densityof 1867.041 kg/m3. The highest compressive strength was 22.63 MPa with coarseaggregates range of 4.75-19 mm. While a gradual decrease of Modulus Elascitywas observed with aggregates range of 19-4,75 mm.Keywords: burned clay, compressive strength, lightweight coarse aggregate,modulus of elasticity

Karakteristik Mortar Dengan Campuran Abu Kerang Lokan Dalam Rendaman NaCl

Jurnal Rekayasa Sipil Vol 14, No 1 (2018)
Publisher : Civil Engineering Departement, Andalas University

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Abstract

Kulit kerang merupakan bahan yang dapat digunakan sebagai bahan pengganti agregat kasar, pengganti pasir, filler, dan sebagai bahan pengganti semen. Kandungan CaO dari kulit kerang berpotensi untuk meningkatkan kekuatan beton dan memperbaiki sifat-sifat beton. Pada penelitian ini abu dari kulit kerang lokan digunakan sebagai bahan tambah atau filler pada mortar dalam rendaman NaCl. Kulit kerang lokan dibakar, dihaluskan dan disaring menggunakan saringan no.200 untuk mendapatkan ukuran partikel yang halus sehingga dapat memberikan reaksi pozzolanik yang lebih baik dan lebih mudah untuk mengisi pori pada pasta semen. Variasi penggunaan abu kulit kerang lokan sebagai bahan tambah atau filler adalah 0%, 5%, dan 10%. Proses perawatan benda uji adalah 28 hari perendaman air biasa dan dilanjutkan dengan perendaman dalam larutan NaCl. Tahap pengujian yaitu pengujian kuat tekan, pengujian porositas, dan perubahan berat. Hasil pengujian menunjukkan bahwa penambahan abu kulit kerang lokan dapat meningkatkan kekuatan beton dan kinerja beton. Mortar dengan penambahan abu kulit kerang lokan sebanyak 5% dan 10% memiliki kekuatan tekan yang  tinggi, porositas rendah dan perubahan berat kecil dibandingkan mortar 0%. Diperoleh nilai optimum dari mortar dengan penambahan abu kulit kerang lokan sebanyak 5% dalam rendaman NaCl.

Kuat Tekan Dan Ultasonic Pulse Velocity (UPV) Beton OPC Dan OPC Abu Sekam Padi Untuk Aplikasi Di Lingkungan Gambut

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

This research study the compressive strength and ultrasonic pulse velocity (UPV) of OPC and OPC rice husk ash (RHA) concrete. Test will be measured after 28 days immersed in peat water. Specimens will be immersed in peat water after 28 days cured in normal water. Compressive strength of OPC concrete showed biggest value than OPC with admixture RHA 5% and 10% which is increasing amount of RHA for subsitute cement will decreasing compressive strength. Test UPV of the specimen showed OPC RHA 5% being best quality than other.Keywords: Durabilty, OPC, RHA, peat environment.

Porositas Dan Sorptivity Beton OPC Dan Beton OPC POFA Dengan Perbaikan Air Gambut Sebagai Air Pencampur Menggunakan Kapur Tohor Di Lingkungan Gambut

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 4, No 2 (2017): Wisuda Oktober Tahun 2017
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The use of peat water is often used as concrete mixing water in areas difficult to obtain clean water. Peat water containing a low pH is not recommended as concrete mixing water because it can reduce the quality of concrete. Mineral materials such as Palm Oil Fuel Ash (POFA) used in the concrete mix to increase the density of the resulting. This study aims to assess the physical properties such as porosity and water sorptivity concrete using peat as concrete mixing water. Type of cement used in the concrete mixture is OPC and OPC POFA 10%. Peat water for the research came from Rimbo Panjang, Kampar, Riau and POFA derived from Perhentian Raja, Kampar, Riau. Research results show that concrete repair using quicklime 40 milligrams for peat water soaked peat environment has a high porosity and sorptivity.Keywords: OPC, Palm Oil Fuel Ash (POFA), peat water, quicklime

Kuat Tekan Paving Block Geopolimer Abu Sawit (Palm Oil Fuel Ash) Dengan Perawatan Suhu Ruang

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 1 (2016): Wisuda Februari Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

Geopolymer is an environmentally friendly alternative construction material made from the process of activating the base material rich in silicon (Si) and aluminum (Al) with a solutionof alkaline activators. In this study, using the ashes of oil derived from Dumai, Riau Province as the base material of geopolymer. With the eco-friendly construction material that theproduct is made with reference to a standard paving blocks. This study is based on variations of modulus activator, dosage activators, and the addition of cement type 1 (OrdinaryPortland Cement) for the treatment of room temperature (setting time) on the composition of the mixture. This study aims to determine the amount of use of the base material (palm oil fuelash) from the comparison alkaline activator with palm oil fuel ash used in paving block geopolymer based treatment time and its influence on the physical properties of the geopolymer paving block. The results showed that the strong increase in modulus of paving blocks are influenced by activators in combination with the addition of cement to each composition.Keywords: palm oil fuel ash, geopolymer, paving block, modulus activator, dosage activator

SIFAT MEKANIS DAN REMBESAN BETON MUTU TINGGI MENGGUNAKAN AGREGAT HALUS PASIR LAUT DAN BAHAN TAMBAH SILICA FUME

Jurnal Sains dan Teknologi Vol 12, No 1 (2013)
Publisher : Jurnal Sains dan Teknologi

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Abstract

Penggunaan pasir laut merupakan salah satu alternatif agregat halus yang sering digunakan di daerah pesisir pantai dan di daerah kepulauan. Pasir laut yang mengandung ion klorida tidak dianjurkan karena dapat memicu terjadinya korosi besi bertulang sehingga beton mengalami kerusakan dalam jangka panjang. Bahan tambah kimia seperti silica fume sering digunakan dalam campuran beton untuk menambah kepadatan, kekuatan, dan kekedapan beton yang dihasilkan. Penelitian ini bertujuan untuk mengkaji sifat-sifat mekanis seperti kuat tekan, kuat tarik belah dan modulus elastisitas beton mutu tinggi yang menggunakan agregat pasir laut dengan kuat tekan rencana 55 MPa. Silica fume ditambahkan ke dalam campuran sebanyak 0%, 4%, 6%, 8% dan 10%. Untuk meningkatkan workability campuran digunakan superplasticizer sebanyak 1,5% dari berat campuran. Pasir laut untuk penelitian berasal dari Tanjung Balai Karimun, Kepulauan Riau. Hasil penelitian menunjukkan bahwa agregat pasir laut dapat digunakan untuk membuat beton mutu tinggi dengan kekuatan rencana 55 MPa. Penambahan silica fume sebanyak 4-10% dalam campuran meningkatkan kuat tekan, kuat tarik dan modulus elastisitas beton yang dihasilkan disamping mengurangi rembesan air ke dalam beton sebesar 9,67 mm. Pengujian kadar Ca sisa mengunakan AAS memperlihatkan bahwa peningkatan persentase silica fume dapat menurunkan jumlah Ca sisa dalam beton.Kata kunci: beton mutu tinggi, klorida, pasir laut, silica fume, sifat mekanis

KINERJA BETON BERSERAT KARET PADA SUHU TINGGI

Jurnal Sains dan Teknologi Vol 12, No 1 (2013)
Publisher : Jurnal Sains dan Teknologi

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Abstract

Selain menjadi salah satu komponen penting pada suatu kendaraan, ban karet juga merupakan salah satu bahan tambah pilihan dalam pembuatan campuran beton, hal ini disebabkan karena sifatnya yang fleksibel sehingga dapat meningkatkan daktilitas beton. Penelitian ini bertujuan untuk menguji kekuatan beton berserat karet setelah terkena panas tinggi. Penggunaan bahan tambah ban karet ini diharapkan dapat meningkatkan kekuatan beton setelah mengalami kebakaran. Selain itu, akan berguna untuk memberikan nilai tambah limbah yang belum dimanfaatkan secara optimal khususnya sebagai bahan bangunan (ramah lingkungan).Metode yang digunakan dalam pembuatan kubus beton berukuran 5×5×5 cm dengan variasi penambahan karet 0%, 3%, 5 dan 8% dari berat semen sebanyak 20 sampel. Pengujian sampel berupa uji bakar dan uji tekan. Hasil penelitian ini menunjukkan bahwa beton dengan tambahan ban karet mempunyai nilai kuat tekan yang lebih tinggi. Pemakaian ban karet sebesar 5% dari berat semen menaikkan nilai kuat tekan sebesar 51,7%. Pada umur 28 hari kekuatan beton menjadi 473,44 kg/cm2, apabila dibandingkan terhadap beton normal tanpa bahan tambah. Berdasarkan penelitin ini disimpulkan penambahan serat karet dapat mengganti kehilangan air pada beton akibat panas tinggi sehingga dapat meningkatkan kekuatan beton.Kata kunci : ban karet, bahan tambah, panas tinggi

Durabilitas Beton Bubuk Kulit Kerang Di Lingkungan Air Laut

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 3, No 2 (2016): Wisuda Oktober Tahun 2016
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

In this study,blood clam used as cement replacement material. The specimens were cured in distilled water until 28 days. Then specimens were immersed in sodium chloride solution until 91 days. The parameters studied include compressive strength, workability, and density. These properties were compared with those of a control concrete that was made of Ordinary Portland Cement (OPC). The main parameter of this study was the proportion of waste blood clam (4% by cement weight).Keywords: blood clam, cement replacement, sodium chloride solution, compressive strength, workability, density

Nilai Slump, Porositas Dan Kuat Tekan Beton OPC Dan OPC RHA Untuk Aplikasi Di Lingkungan Gambut

Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains Vol 5, No 1 (2018): Wisuda April Tahun 2018
Publisher : Jurnal Online Mahasiswa (JOM) Bidang Teknik dan Sains

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Abstract

The aggressive environment, especially the peat environment contains many chemicals that can unravel the elements in the concrete, causing damage to the concrete. This study examines the strength and physical properties of OPC (Ordinary Portland Cement) concrete and OPC RHA (Rice Husk Ash) concrete exposed in peat environments. RHA as one of pozzolan with high silica is used as a replacement of cement with the substitution of 5% and 10%. This concrete are tested mechanically and physically such as compressive strength and porosity tests after soaking in peat canals for 28 days, in addition to fresh concrete tests such as workability. The concrete strength of the planned concrete is K-250. The peat water used as a test immersion medium has a pH of 3.5-4.5. The results of fresh concrete testing show that the addition of RHA makes the workability decreases. The lowest workability was obtained from a mix containing 10% RHA. The OPC concrete has the highest compressive strength of 20,28 MPa. Porosity of OPC RHA concrete decreased with increase in curing time. The lowest porosity is shown by OPC RHA 10% concrete. Based on the results of the test, it is concluded that the replacement of cement by RHA, has a positive effect on all physical properties of concrete.Keywords: Peat Environtment, OPC, RHA, Compressive strength, Physical Properties