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Erwin Riduan
Beton ramah lingkungan dengan menggunakan limbah beton sebagai agregat kasar dan limbah kaca sebagai bahan tambahan (Filler) dalam beton = Environmental concrete using waste concrete as coarse agregate and waste glasses as filler in the conrete mix
"Dalam era saat ini, dimana sedang maraknya dilakukan gerakan peduli lingkungan, penambangan besar-besaran mulai diusahakan untuk dikurangi, sehingga perlu dipikirkan pengadaan jenis sumber agregat baru yang dapat diperbaharui dalam pembuatan beton. Limbah beton dan limbah kaca seringkali menjadi sampah dan berpotensi merusak lingkungan karena sifatnya yang sulit terurai. Padahal kedua bahan tersebut mempunyai potensi untuk dimanfaatkan, salah satunya sebagai pengganti agregat dalam beton. Jika hal ini dapat dilakukan selain mengurangi pencemaran juga untuk mengurangi penambangan batuan alam untuk agregat.
Pada penelitian kali ini akan dicoba membuat beton dengan mengunakan limbah beton dan limbah kaca dengan target kekuatan beton yaitu fc - 25 MPa. Agregat kasar yang digunakan berasal dari limbah beton yang mempunyai kekuatan rencana fc - 35 MPa. Agregat tersebut akan diuji apakah memenuhi syarat-syarat untuk dapat digunakan sebagai agregat kasar dalam beton. Pada agregat kaca akan dilakukan pengujian yaitu pengujian X-Ray Flourescent dimana dari hasil pengujian ini akan didapatkan kandungan kimia dalam kaca untuk menetukan jenis kaca yang akan dipakai. Agregat kaca akan digunakan sebagai bahan tambahan (filler) dalam beton. Jumlah kaca yang ditambahkan ke dalam campuran beton adalah sebesar 10 %, 20 %, 30%, 40%, dari volume agregat halus yang dipakai. Sedangkan limbah beton akan seluruhnya dijadikan sebagai agregat kasar. Pengujian yang dilakukan terhadap beton adalah uji tekan,uji kuat tarik belah dan uji kuat tarik lentur.
Dari hasil penelitian didapatkan limbah beton yang akan dipakai memenuhi semua syarat-syarat yang diperlukan untuk dapat digunakan sebagai agregat kasar dalam beton. Penggunaan kembali limbah beton dari beton yang mempunyai kuat tekan rencana fc - 35 MPa sebagai agregat kasar dalam beton dapat menghasilkan beton dengan kuat tekan fc - 25 MPa. Penggunaan kaca sebagai filler dalam beton dapat meningkatkan kuat tekan beton hingga pada kadar tertinggi yang diteliti yaitu 40 %, sedangkan penggunaan limbah kaca sebagai filler dapat meningkatkan kekuatan tarik jika pada beton ditambahkan 40 % kaca, dan untuk kuat lentur beton didapatkan kadar optimum penambahan kaca untuk meningkatkan kekuatan lentur pada kadar 30%.
At present, in which many of natural conservation having been strictly carried out, mining with huge number have already been reduced so that another alternative of supply aggregate needs to be determined according with the necessity of concrete production. Unbreakable material like concrete waste and glasses waste are usually considered raises any damage to the environment. In fact, those material can be recycled and effectively turn into another alternative of aggregate in concrete production. If the idea above would seriously be implemented, there is no wonder if the excess of natural exploration, and pollution on earth could be reduced.
The bottom line of this observation were trying to produced any concrete having pressure strength fc' about 25 MPa by using concrete waste and glasses waste. Coarse aggregate were came from waste concrete that have plan strength fc' 35 MPa. It would passed some qualifying test before having been used as aggregate. To determine which kind of glasses would be used as finer, the glasses would passing an X-Ray Flourescent. It is necessary to find out the content of chemical compound in it. glasses serve as a filler in the new concrete product. The number of percentage of glasses in mixing concrete would be 10 %, 20 %, 30%, 40%, from troughout of fine aggregate volume. Whereas the concrete waste would be used as coarse aggregate thoroughly. In the end, the new concrete product must passed some tests as follow : Compression test, splitting test, and flexible strength test.
From the observation result would be revealed the waste concrete qualified to be used as coarse aggregate in the new concrete product. The new concrete product is expected to has its plan pressure strength magnitude fc' 25 MPa. Fourty percent glasses usage as filler in any concrete production will more generate its pressure strength, waste glasses usage will more generate its tensile strength if using 40 % addition glasses, and 30 percent waste glasses usage is the optimum level to generate it's flexible strength."
2008
S35353
UI - Skripsi Open  Universitas Indonesia Library
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Salsabila Tsamarachianti
Studi balok beton strukturan dengan limbah kertas sebagai substitusi agregat halus dan limbah beton dengan mutu di atas 40 MPa sebagai substitusi agregat kasar = Study of structural concrete beam with waste paper as a fine aggregate substitution and waste concrete with strength over 40 MPa as a coarse aggregate substitution
"ABSTRAK
Kebutuhan Indonesia terhadap pembangunan konstruksi terutama rumah tinggal terus mengikat seiring dengan bertambahnya penduduk di Indonesia. Hal ini mendorong inovasi beton yang ramah lingkungan, murah, dan mudah didapat. Oleh karena itu, penggunaan limbah seperti limbah beton dan limbah kertas sebagai subtitusi material campuran beton dapat menjadi salah satu alternatif. Dalam rangka mengembangkan penelitian sebelumnya, penelitian ini melihat secara langsung penggunaan beton kertas dalam aplikasinya pada balok rumah tinggal serta meninjau kembali pengolahan kertas untuk dijadikan material campuran beton. Pada penelitian ini, dibuat benda uji balok bertulang yang sesuai dengan dimensi aktual dengan skala 1:2 dari kebutuhan rumah tinggal. Hasil penelitian memaparkan bahwa penggunaan material subtitusi limbah beton dan limbah kertas dapat mempertahankan kuat tekan beton struktural dengan nilai kuat tekan lebih dari 17 MPa sesuai dengan standar pada SNI 03 ndash; 2847 ndash; 2013 dengan rata-rata kuat tekan 27,4 MPa. Sedangkan kuat tarik belah pada penelitian ini memiliki rata-rata sebesar 2,9 MPa. Dari pengujian yang dilakukan, kuat lentur campuran beton pada penelitian ini memiliki nilai yang lebih tinggi daripada balok beton normal dengan nilai ? yang lebih besar dari pada 1 yaitu sebesar 1,44 pada bentang 60 cm dan 1,40 pada bentang 30 cm. Pada balok beton bertulang, hanya terdapat dua kelompok pengadukan yaitu, C-28-4 dan C-28-5 yang dapat menjadi balok beton struktural.
ABSTRACT
Indonesia 39 s necessity of construction development, notably residential home, increasing constantly along with the ammount of Indonesia 39 s population. This matter stimulates innovation of eco friendly, inexpensive, and reachable concrete. With regard to this, utilization of waste, e.g. waste concrete and waste paper as a subtitution for mixed concrete is one of the alternative for an inovation concrete. In order to expand the previous research, this research aims to observe the utilization of papercrete for application of concrete beam for residential home directly, as well as to review the processing of paper to be used as concrete materials. The sample of this research which corresponds to actual dimension with the scale of 1 2 of concrete beam for residential home necessity, is the outcome of this research. The concrete beam is tested by utilizing flexural strength test and cracking behaviour from the beam. This research suggested that utilization of waste concrete and waste paper material substitution may uphold structural compressive strength with the value of compressive strength is more than 17 MPa, in accordance with SNI standard 03 ndash 2847 ndash 2013, with average of compressive strength 27.4 Mpa. In this research, splitting tensile strength has the average value of 2.9 MPa. This examination suggested that flexural of mixed concrete has higher value than normal concrete beam with lamda value more than 1, which is 1.44 for 60 cm span and 1.40 for span 30 cm. On reinforced concrete beam, there were merely two groups of the samples, namely C 28 4 and C 28 5 which could transform into structural concrete beam."
Depok: Fakultas Teknik Universitas Indonesia, 2018
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UI - Skripsi Membership  Universitas Indonesia Library
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Zahran Athalla Zidane
Pengaruh Limbah Beton Sebagai Agregat Kasar terhadap Nilai skid Resistance Terhadap Suhu = Influence Of Recycled Concrete Waste As Coarse Aggregates To The Value of Skid Resistance To The Temperature
"Di Indonesia, umumnya, limbah konstruksi tidak dimanfaatkan dengan baik. Untuk mencegah siklus kerusakan alam tersebut, diperlukan suatu inovasi. Inovasi yang dapat menjadi solusi dari limbah-limbah konstruksi yang terus bertambah dan untuk mengurangi dampak-dampak yang tidak diinginkan pada lingkungan. Selain itu, Hal ini dapat menjadi alternatif penggunaan agregat alami untuk perkerasan jalan yang terus menipis. Penelitian ini merencanakan penggunaan limbah beton sebagai pengganti agregat kasar pada campuran lapis aus (AC-WC) sebagai salah satu perwujudan inovasi terhadap solusi dari permasalahan limbah konstruksi yang ada di Indonesia. Pengujian skid resistance dilakukan kepada campuran lapis aus (AC-WC) modifikasi sebagai parameter pengaruh dan kelayakan penggunaan campuran pada dunia nyata.
Penelitian ini merencanakan campuran lapis aus (AC-WC) modifikasi dengan komposisi agregat kasar (batu split), agregat menengah (screening), agregat halus (abu batu) dan RCA. Kadar aspal optimum terbaik, Nilai skid resistance serta pengaruh limbah beton sebagai pengganti agregat kasar akan dibandingkan dengan sampel kontrol yaitu campuran lapis aus (AC-WC) dengan komposisi agregat kasar (batu split), agregat menengah (screening) dan agregat halus (abu batu). Pengujian skid resistance menggunakan alat British Pendulum Tester terhadap campuran lapis aus (AC-WC) modifikasi dan non modifikasi dengan KAO nya yaitu 9% dan 98. Berubahnya komposisi campuran lapis aus (AC-WC) mempengaruhi nilai skid resistance menjadi lebih tinggi.
In Indonesia, usually, construction waste is not put to good use. To prevent this cycle of destruction of nature, an innovation is needed. Innovations that can be a solution to the growing construction waste problems and to reduce the unwanted impacts on the environment. thus, it can be an alternative to the use of natural aggregates for road pavements that continue to thin out. This study plans the use of concrete waste as a substitute for coarse aggregates in wear-coated mixtures (AC-WC) as one of the manifestations of innovation to the solution to the problem of construction waste in Indonesia. Skid resistance testing is performed on modified wear-coated mixtures (AC-WC) as parameters of the influence and feasibility of using the mixture on the field.
This study planned a modified wear-coated mixture (AC-WC) with the composition of split stones as the coarse aggregates, screening as the intermediate aggregates, stone ash as fine aggregates and reclaimed concrete aggregates as the substitution of the coarse aggregates. The best optimum asphalt content, skid resistance value and the influence of concrete waste as a substitute for coarse aggregate will be compared with control samples, wear-coated mixtures (AC-WC) with a composition of coarse aggregate (split stone), medium aggregate (screening) and fine aggregate (stone ash). Skid resistance testing using the British Pendulum Tester tool against modified and non-modified wear-coated mixtures (AC-WC) with its KAO, namely 9% and 8%. Changes in the composition of the wear-coated mixture (AC-WC) affect the value of skid resistance to be higher."
Depok: Fakultas Teknik Universitas Indonesia, 2022
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UI - Skripsi Membership  Universitas Indonesia Library
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Reyhan Ananda
Pengaruh Limbah Beton Sebagai Agregat Kasar Terhadap Nilai Volumetrik Marshall = The Effect of Concrete Waste as Concrete Aggregate on Marshall Volumetric Value
"Perkembangan infrastruktur jalan di Indonesia akan membutuhkan banyak nya batuan dan pasir untuk membangun jalan nasional dan jalan tol, sehingga dapat mempengaruhi alam. Dengan itu muncul solusi pemakaian limbah beton sebagai agregat pada perkerasan jalan untuk mengurangi jumlah batuan alami dalam pembuatan jalan nasional dan jalan tol. Limbah beton dapat kita jumpai dimanapun, limbah beton dapat berupa bongkahan penghancuran bangunan, puing-puing proyek infrastruktur, dan limbah beton pabrik. Penggunaan limbah beton akan dipakai sebagai agregat kasar dengan variasi kadar aspal 7%, 7,5%, 8%, 8,5%, dan 9%. Lalu digunakan kadar aspal 6%, 6,5%, 7%, 7,5%, dan 8% untuk agregat batuan sebagai pebanding penggunaan limbah beton sebagai agregat kasar. Pengujian akan dilakukan dengan Marshall Standard dan Immersion. Hasil menunjukan bahwa limbah beton sebagai agregat kasar meningkatkan Stabilitas, Marshall Quotient, VMA, dan VIM lalu menurunkan nilai VFA, Flow, dan Indeks Kekuatan Sisa.
The development of road infrastructure in Indonesia will require a lot of rock and sand to build street roads and toll roads, sthe needs of those materials can affect nature. With that came the solution of using concrete waste as aggregate on road pavements to reduce the amount of natural rock in the construction of street roads and toll roads. We can find concrete waste anywhere, concrete waste can be obtaint from demolishing bulidings, infrastructure project debris, and factory concrete waste. Waste concrete will be used as coarse aggregate with variations in asphalt content of 7%, 7.5%, 8%, 8.5%, and 9%. Then used asphalt content of 6%, 6.5%, 7%, 7.5%, and 8% for natural aggregates as a comparison for the use of concrete waste as coarse aggregate. Tests will be carried out with Marshall Standard and Immersion. The results show that waste concrete as coarse aggregate increases Stability, Marshall Quotient, VMA, and VIM and then decreases VFA, Flow, and Residual Strength Index values."
Depok: Fakultas Teknik Universitas Indonesia, 2022
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UI - Skripsi Membership  Universitas Indonesia Library
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Imam Jauhari Maknun
Studi perilaku kuat tekan dan susut pada beton dengan tambahan kaca sebagai filler dan agregat halus
Depok: Fakultas Teknik Universitas Indonesia, 2009
S50512
UI - Skripsi Open  Universitas Indonesia Library
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Bima Abimayu Ramadhana
Pemanfaatan Limbah Beton Sebagai Agregat Menengah dan Limbah Plastik pada Paving Concrete Block = Utilization of Waste Concrete as Medium Aggregate and Plastic Waste in Paving Concrete Block
"Untuk mendukung kesepakatan Sustainable Development Goals (SDGs), sektor konstruksi dapat melakukan pembangunan berbasis ‘green building’. Beton merupakan material yang sangat dibutuhkan sebagai bahan konstruksi namun menimbulkan dampak negatif pada lingkungan pada prosesnya. Selain itu bahan lain yang menjadi permasalahan lingkungan yaitu plastik. Sifat plastik yang sulit terurai menjadikannya salah satu faktor timbulan sampah. Material tersebut akan lebih baik apabila didaur ulang menjadi salah satu material konstruksi pengganti Natural Aggregat (NA). Pada penelitian ini mengkaji pengaruh penggunaan agregat limbah beton (RCA) sebagai pengganti agregat menengah dan penambahan plastik LDPE pada nilai kuat tekan dari paving block. Pada penelitian ini akan digunakan agregat limbah beton klasifikasi menengah yaitu tertahan saringan No.4, No,8, No.16, dan No. 30 pada seluruh sampel uji paving block. Kemudian dilakukan variasi penambahan plastik sebesar 4%, 6%, 8%, dan 10% dari kadar semen yang digunakan pada tiap sampel. Proses pemadatan dilakukan secara manual dengan alat pemukul besi (compactor). Model sampel paving block yang akan dilakukan kuat tekan dibagi menjadi dua yaitu pengujian balok dan pengujian kubus sesuai SNI 03-0691-1996 dimana paving block tebal 6 cm menjadi 5x5x5 cm dan untuk paving block tebal 10 cm menjadi 9x9x9 cm. Didapatkan hasil bahwa nilai kuat tekan rata-rata tertinggi dari penggunaan RCA dan limbah plastik LDPE pada variasi sampel 6 cm yaitu dengan kadar plastik 6% dari berat semen yang digunakan. Nilai kuat tekan rata-rata sampel kubus 5x5x5 cm yaitu 210.36 kg/cm² dan sampel uji balok 6 cm yaitu 318.34 kg/cm². Sedagkan pada variasi sampel 10 cm yaitu dengan kadar plastik 4% dari berat semen yang digunakan. Nilai kuat tekan sampel kubus 9x9x9 cm yaitu 229.32 kg/cm² dan sampel balok 10 cm 200.89 kg/cm². Sehingga penambahan serbuk limbah plastik yang optimal terdapat pada rentang 4% - 6% dari berat semen yang digunakan.
To support the Sustainable Development Goals (SDGs) agreement, the construction sector can carry out 'green building' based development. Concrete is a material that is needed as a construction material but harms the environment in the process. In addition, another material that is an environmental problem is plastic. The nature of plastic is difficult to decompose makes it a factor in the generation of waste. The material will be better if it is recycled into one of the construction materials to replace Natural Aggregate (NA). This study examines the effect of using waste concrete aggregate (RCA) as a substitute for intermediate aggregate and the addition of LDPE plastic on the compressive strength of paving blocks. In this study, the aggregate of intermediate classification of concrete waste will be used, namely retained by sieves No.4, No.8, No.16, and No. 30 on all paving block test samples. Then, the addition of plastic was varied by 4%, 6%, 8%, and 10% of the cement content used in each sample. The compaction process is carried out manually with an iron beater (compactor). The paving block sample model that will be subjected to compressive strength is divided into two, namely, beam testing and cube testing according to SNI 03-0691-1996 where 6 cm thick paving blocks become 5x5x5 cm and 10 cm thick paving blocks 9x9x9 cm. It was found that the highest compressive strength value from using RCA and LDPE plastic waste at a sample variation of 6 cm, with a plastic content of 6% of the weight of the cement used. The compressive strength of the 5x5x5 cm cube sample is 210.36 kg/cm² and the 6 cm beam test sample is 318.34 kg/cm². Meanwhile, in the sample variation of 10 cm, with a plastic content of 4% of the weight of the cement used. The compressive strength of the 9 x 9 x 9 cm cube sample is 229.32 kg/cm² and the 10 cm beam sample is 200.89 kg/cm². So that the optimal addition of plastic waste powder is in the range of 4% - 6% of the weight of the cement used."
Depok: Fakultas Teknik Universitas Indonesia, 2022
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UI - Skripsi Membership  Universitas Indonesia Library
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Hestia Hartini Novitasari
Substitusi pecahan kaca sebagai agregat kasar pada beton portland dan beton geopolimer pengaruhnya pada kuat tekan = Waste glass as course aggregate substitution in portland and geopolymer concrete its effect on compressive strength
"[ ABSTRAK
Kaca merupakan sumber silika amorphous yang baik serta memiliki komposisi kimia dan reaktivitas yang tepat untuk melakukan reaksi Pozzolan. Sehingga muncul lah ide untuk menggunakan kaca sebagai agregat kasar pada beton. Pada penelitian ini, sampel yang dibuat adalah dua jenis beton, yaitu Portland dan Geopolimer dengan variasi substitusi kaca sebanyak 0%, 25%, 50%, 100%. Pengujian yang dilakukan adalah uji tekan dan pengamatan foto makro. Komposisi beton, sejarah perlakuan, dan suhu curing memberi pengaruh signifikan pada nilai kuat tekan yang dihasilkan. Kesimpulan yang didapatkan adalah beton Portland dan beton geopolimer dengan substitusi kaca sebesar 50% memiliki kuat tekan tertinggi, dan pasta geopolimer dapat melekat pada kaca namun pasta semen tidak.
ABSTRACT
Glass are good source of amorphous silica and it also has good chemistry composition and precise reactivity to make Pozzolan reaction. So there was an idea to use glass as coarse aggregate in concrete. In this research, two types of concrete will be made, which are Portland concrete and geopolymer concrete with variation of waste glass substitution as much as 0%, 25%, 50%, 100%. The conducted tests are pressure test and macro photos observations. Concrete composition, treatment history, and curing temperature gave significant influence on their compressive strength. The conclusions are both portland and geopolymer concrete with 50% waste glass substitution has the highest compressive strength, and geopolymer paste could adhered to glass but cement paste could not.;Glass are good source of amorphous silica and it also has good chemistry composition and precise reactivity to make Pozzolan reaction. So there was an idea to use glass as coarse aggregate in concrete. In this research, two types of concrete will be made, which are Portland concrete and geopolymer concrete with variation of waste glass substitution as much as 0%, 25%, 50%, 100%. The conducted tests are pressure test and macro photos observations. Concrete composition, treatment history, and curing temperature gave significant influence on their compressive strength. The conclusions are both portland and geopolymer concrete with 50% waste glass substitution has the highest compressive strength, and geopolymer paste could adhered to glass but cement paste could not.;Glass are good source of amorphous silica and it also has good chemistry composition and precise reactivity to make Pozzolan reaction. So there was an idea to use glass as coarse aggregate in concrete. In this research, two types of concrete will be made, which are Portland concrete and geopolymer concrete with variation of waste glass substitution as much as 0%, 25%, 50%, 100%. The conducted tests are pressure test and macro photos observations. Concrete composition, treatment history, and curing temperature gave significant influence on their compressive strength. The conclusions are both portland and geopolymer concrete with 50% waste glass substitution has the highest compressive strength, and geopolymer paste could adhered to glass but cement paste could not.;Glass are good source of amorphous silica and it also has good chemistry composition and precise reactivity to make Pozzolan reaction. So there was an idea to use glass as coarse aggregate in concrete. In this research, two types of concrete will be made, which are Portland concrete and geopolymer concrete with variation of waste glass substitution as much as 0%, 25%, 50%, 100%. The conducted tests are pressure test and macro photos observations. Concrete composition, treatment history, and curing temperature gave significant influence on their compressive strength. The conclusions are both portland and geopolymer concrete with 50% waste glass substitution has the highest compressive strength, and geopolymer paste could adhered to glass but cement paste could not.;Glass are good source of amorphous silica and it also has good chemistry composition and precise reactivity to make Pozzolan reaction. So there was an idea to use glass as coarse aggregate in concrete. In this research, two types of concrete will be made, which are Portland concrete and geopolymer concrete with variation of waste glass substitution as much as 0%, 25%, 50%, 100%. The conducted tests are pressure test and macro photos observations. Concrete composition, treatment history, and curing temperature gave significant influence on their compressive strength. The conclusions are both portland and geopolymer concrete with 50% waste glass substitution has the highest compressive strength, and geopolymer paste could adhered to glass but cement paste could not., Glass are good source of amorphous silica and it also has good chemistry composition and precise reactivity to make Pozzolan reaction. So there was an idea to use glass as coarse aggregate in concrete. In this research, two types of concrete will be made, which are Portland concrete and geopolymer concrete with variation of waste glass substitution as much as 0%, 25%, 50%, 100%. The conducted tests are pressure test and macro photos observations. Concrete composition, treatment history, and curing temperature gave significant influence on their compressive strength. The conclusions are both portland and geopolymer concrete with 50% waste glass substitution has the highest compressive strength, and geopolymer paste could adhered to glass but cement paste could not.]"
Depok: Fakultas Teknik Universitas Indonesia, 2016
S62219
UI - Skripsi Membership  Universitas Indonesia Library
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Muhammad Dimas Luqman
Pengaruh substitusi kaca sebagai agregat kasar terhadap perilaku korosi tulangan baja beton geopolimer pada larutan NaCL 3,5% = Corrosion behavior of steel reinforcement in geopolymer concrete using waste glass as coarse aggregates in NaCL 3,5% solution
"Korosi menjadi penyebab utama rusaknya suatu struktur yang terbuat dari beton dengan tulangan baja. Penggunaan beton geopolimer terbukti dapat meningkatkan ketahanan tulangan baja terhadap serangan korosi, namun perlu dilakukan penelitian lebih lanjut untuk meningkatkan ketahanan korosi baja tulangan dalam beton, dengan tetap memperhatikan aspek lingkungan. Pada penelitian ini dilakukan substitusi kaca yang berasal dari botol bekas, sebagai agregat kasar dalam beton geopolimer. Pengujian ini dilakukan dengan merendam beton ke dalam larutan NaCl 3,5 % selama 31 hari, perilaku korosi tulangan baja dalam beton geopolimer diamati dengan metode polarisasi tahanan linier dan ekstrapolasi tafel. Hasil pengujian pada saat mencapai hari 31, menunjukan bahwa substitusi agregat kasar menggunakan kaca tidak memperbaiki ketahanan beton geopolimer terhadap korosi. Dimana, tahanan polarisasi baja dalam beton geopolimer dengan agregat kaca adalah 2935 Ω, lebih rendah dibanding nilai tahanan tulangan baja dalam beton geopolimer dengan agregat batu yakni 5235 Ω. Sedangkan laju korosi tulangan baja pada beton geopolimer dengan agregat kaca adalah 5,00 x 10-3 mm/tahun , lebih tinggi dibanding tulangan baja dalam beton dengan agregat batu yaitu 2,35 x 10-3 mm/tahun. Analisa komposisi larutan rendam dilakukan menggunakan metoda Atomic Absorbance Spectroscopy. Awalnya, larutan NaCl 3,5% memiliki kadar natrium senilai 13770 μm/ml. Usai masa perendaman beton, larutan rendam milik beton dengan agregat batu memiliki kandungan natrium 2252 μm/ml. Nilai tersebut lebih tinggi dibandingkan dengan kadar natrium larutan rendam beton dengan agregat kaca yaitu 1910 μm/ml. Hal ini mengindikasikan bahwa beton geopolimer dengan agregat kaca lebih mudah menyerap unsur dari luar lingkungan ke dalam beton.
Corrosion is major cause damage to structure made of concrete with steel reinforcement. Using geopolymer concrete will increase the resistance of steel reinforcement against corrosion attack, further research needs to be done to improve the corrosion resistance of steel reinforcement, in regard to environmental aspects. In this research, waste glass is used as coarse aggregate in geopolymer concrete. Test was carried out by immersing concrete into 3,5% NaCl solution for 31 days, corrosion behavior of reinforcing steel in geopolymer concrete observed by linear polarization resistance and tafel extrapolation method. Test result on 31-day, showed that substitution of coarse aggregate with waste glass doesn?t improve the corrosion resistance of reinforce steel on geopolymer concrete. Which, polarization resistance value of steel reinforcement on geopolymer concrete with glass aggregate is 2935 Ω, less than polarization resistance value of steel reinforcement on geopolymer concrete with stone aggregate is 5235 Ω . On the other hand corrosion rate of steel reinforcement in geopolymer concrete with glass aggregate is 5,00 x 10-3 mm/year, were found to be higher than reinforcement steel on geopolymer concrete with stone aggregate that is 2,35 x 10-3 mm/year . Analysis of immersion solution composition were performed using Atomic Absorbance Spectroscopy method. Initially, the NaCl 3,5% solution, have sodium content worth of 13770 μm/ml. After immersion period, immersion solution belongs to concrete with stone aggregate has a sodium content 2252 μm/ml. These value is higher than the natrium content from immersion solution of concrete with glass aggregate which is 1910 μm/ml. This result indicates that geopolymer concrete with glass aggregate more easily absorb elements from the environment into the concrete."
Depok: Fakultas Teknik Universitas Indonesia, 2014
S55840
UI - Skripsi Membership  Universitas Indonesia Library
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Hilmy Darmawan
Studi sifat mekanis pada campuran beton dengan agregat kasar daur ulang dan bubur kertas sebagai pengganti pasir = Study to analyse the effect of fine agregate proportion to total agregate in recycled concrete using paper pulp as replacement of fine agregate
"ABSTRAK
Pada era perkembangan bidang konstruksi saat ini, kebutuhan konstruksi semakin meningkat. Permintaan bahan bangunan yang kuat, ramah lingkungan, dan mudah didapat menjadi sasaran untuk pembangunan saat ini baik dalam skala besar maupun kecil. Penggunaan limbah yang tepat dapat menciptakan pembangunan hunian murah dan layak pakai tentu menjadi solusi untuk membantu mengurangi pengeluaran pemerintah. Pada penelitian ini, limbah yang akan digunakan adalah limbah beton dan limbah kertas. Pada penelitian ini, limbah yang digunakan yaitu beton dengan mutu lebih atau sama dengan K-500 dan limbah kertas di Fakultas Teknik Universitas Indonesia. Limbah beton dihancurkan untuk menggantikan seluruh agregat kasar alami sedangkan kertas dijadikan bubur kertas sebagai pengganti 10 dari volume agregat halus. Komposisi pada penelitian ini ditetapkan dengan perbandingan semen : agregat = 1:3 dengan proporsi agregat halus sebesar 40 , 45 , dan 50 dari total agregat. Hasil penelitian menunjukan bahwa pada kuat tekan dan kuat lentur komposisi 45 agregat halus merupakan komposisi optimum. Kuat tekan yang dihasilkan sebesar 38,11 MPa atau meningkat sebesar 37 dari beton normal pada hari ke 56 sedangkan kuat lentur yang dihasilkan sebesar 3,87 MPa atau meningkat 19 dari beton normal. Pada pengujian modulus elastisitas, komposisi 50 menghasilkan nilai modulus elastisitas terkecil. Untuk pengujian susut, komposisi 50 menghasilkan nilai tertinggi.
ABSTRAK
In this current era of construction development, the need for constructions are increasing. The demand for a strong, eco friendly, and easy to get building materials has been the target for current development in both large and small scales. the building materials can be more economical if it uses recycled materials. The appropriate use of wastes can be turned into a concrete that is more cheaper and still meet the standards. In this research, the wastes that will be used are concrete waste and paper waste. Based on previous researchs, the weight of mortar in recycled aggregate is 25 35 for size 8 16 mm and 60 for 4 8 mm diameter. Whereas paper has 56.38 of Calcium Oxide CaO , 16.11 of water H2O , 11.26 of Sulphur Trioxide SO3 , and other elements. In this research, the wastes that are used are concrete with high grade are the same as K 500 and paper waste from Engineering Faculty, Universitas Indonesia. Concrete waste is destroyed to replace all of the natural coarse aggregate while paper is pulped to substitute the 10 of the fine aggregate volume. The composition of this research is determined by the ratio of cement aggregate 1 3 with the fine aggregate proportions are 40 , 45 , and 50 from the total of aggregate. The result of this research shows that from the compression strength and bending strength of the fine aggregate composition of 45 is the most optimum composition. The resulting compression strength is 38.11 MPa or increased 37 from a normal concrete on the 56 day whereas the resulting bending strength is 3.87 MPa or increased 19 from a normal concrete. In the modulus of elasticity test, 50 composition yields the smallest modulus of elasticity. For the shrinkage test, 50 composition yield the highest."
2017
S70079
UI - Skripsi Membership  Universitas Indonesia Library
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Putri Marastuti
Studi penggunaan agregat kasar daur ulang dari limbah beton padat dengan mutu K350- K400 terhadap kuat tekan kuat lentur, dan susut pada beton = Study of using recycled coarse aggregate from hardened doncrete K350-K400 to compressive strength, flexural strength, and shrinkage in concrete
"Saat ini telah terjadi penambangan sumber daya alam bahan baku beton secara berlebihan. Dilihat dari sisi lain, banyak terdapat limbah beton yang hanya menjadi limbah di tempat pembuangannya. Penelitian ini akan menggunakan agregat kasar daur ulang sebagai agregat pada beton. Komposisi benda uji terdiri dari 0%, 20%, 40%, dan 60% agregat kasar daur ulang dari limbah beton mutu K350-K400. Pengujian meliputi, yaitu pengujian kuat tekan, kuat lentur, dan susut pada beton. Kuat tekan dan kuat lentur beton dengan komposisi 20% agregat kasar daur ulang meningkat 14,961% dan 12,5% dari kuat beton normal pada umur 28 hari. Susut beton dengan komposisi 60% agregat kasar daur ulang mempunyai nilai susut tertinggi dibandingkan dengan campuran lainnya.
Nowadays, there is a natural resource mining of concrete forming materials excessively. On the other hand, there are a lot of concrete waste in concrete waste dumps. This study will use recycled coarse aggregate as aggregate in concrete. The composition of the test object consisting of 0%, 20%, 40%, and 60% recycled coarse aggregate from concrete waste K350-K400. Testing includes, compressive strength test, flexural strength, and shrinkage in concrete. Compressive strength and flexural strength of concrete with 20% recycled coarse aggregate increased by 14.961% and 12.5% of the normal concrete at 28 days. Shrinkage of concrete with a composition of 60% recycled coarse aggregate has the highest shrinkage value compared to other mixtures."
Depok: Fakultas Teknik Universitas Indonesia, 2014
S55453
UI - Skripsi Membership  Universitas Indonesia Library
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