Ditemukan 6 dokumen yang sesuai dengan query
Khon Kaen: Sustainable Infrastructure Research and Development Center, Khon Kaen University, 2006
547.7 INT p
Buku Teks Universitas Indonesia Library
Tambun, Dicky Liberman
"Berbagai material aluminosilikat telah digunakan sebagai prekursor untuk geopolimer. Geopolimer mendapat kekuatannya dari polikondensasi silikat dan alumina. Metakaolin, kaolin yang kalsinasi, adalah pozzolan dengan alumina dan kemurnian silika tertinggi. Indonesia, khususnya Pulau Bangka, memiliki sejumlah besar deposit kaolin yang dijual dengan harga murah. Harga ini bisa ditingkatkan sepuluh kali ketika dijual sebagai metakaolin. Penelitian ini bertujuan untuk membandingkan sifat mekanik dan metalurgi metakaolin komersial dan kaolin Bangka yang dikalsinasi pada 700°C. Kedua metakaolin bereaksi dengan NaOH dan waterglass sebagai aktivator diikuti dengan pengawetan pada suhu kamar selama 7, 14 dan 28 hari dan suhu tinggi 60°C selama 4, 12 dan 24 jam. Sifat mekanik akan diperiksa dengan kuat tekan dan uji kuat lentur, dan uji susut sedangkan sifat metalurgi akan dievaluasi dengan SEM, dan TAM. Hasil uji mekanis akan digunakan untuk menentukan geopolimer mana yang akan berkinerja baik dengan struktur mikro dan aktivitas termal untuk mendukung temuan tersebut. Upaya-upaya ini akan dilakukan dalam rangka meningkatkan properti dari Bangka metakaolin geopolimer yang lebih unggul dari metakaolin komersial.
Various aluminosilicate material have been used as precursor for geopolymer. Geopolymer gets its strength from the polycondensation of silicate and alumina. Metakaolin, calcinated kaolin, is pozzolan with the highest alumina and silicate purity. Indonesia, especially Bangka Island, has a large amount of kaolin deposit that being sold at low price. This price could be increased ten times when being sold as metakaolin. This study aimed to compare mechanical and metallurgical properties of commercial metakaolin and Bangka kaolin which calcinated at 700°C. Both metakaolins reacted with NaOH and waterglass as the activator followed by curing at room temperature for 7, 14 and 28 days and elevated temperature of 60°C for 4, 12 and 24 hours. Mechanical properties will be examined by compressive strength and flexural strength test, while the metallurgical properties will be evaluated with SEM, and TAM. The results of the mechanical test will be used to determine which geopolymer will perform well with the microstructure and thermal activity to support the finding. These attempts will be done in order to improve the properties of Bangka metakaolin geopolymer superior to commercial metakaolin. "
Depok: Fakultas Teknik Universitas Indonesia, 2018
S-Pdf
UI - Skripsi Membership Universitas Indonesia Library
"Fly ash (abu terbang) batubara biasanya masih mengandung komponen-komponen/senyawa diantaranya terdiri dari SiO2, Al2O3, FE2O3, CAO dan sebagian kecilnya adalah unsur-unsur seperti Na2O, MgO dan K2O serta pengotor lainnya. Unsur-unsur utama tersebut merupakan bahan pozzolan, yaitu bahan yang mengandung senyawa silica alumina, dimana bahan pozzolan itu sendiri tidak mempunya sifat mengikat seperti semen, karena mempunyai bentuknya yang halus dan masih mengandung kadar air."
620 JTEK 9 (1-2) 2010
Artikel Jurnal Universitas Indonesia Library
Hestia Hartini Novitasari
"[
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
Stefani Astari Dewi Aryani
"Latar Belakang: Pengisian saluran akar dengan teknologi terbaru siler premixed kalsium silikat pozolan dengan aktivasi ultrasonik dapat mengurangi porositas pengisian saluran akar. Reaksi pozolan menghasilkan siler dengan daya alir yang lebih baik dengan waktu pengerasan yang lebih cepat, terlebih dengan aktivasi ultrasonik yang akan mengurangi terbentuknya porositas dan meningkatkan kerapatan siler terhadap dinding saluran akar.
Tujuan: Menganalisis perbedaan kerapatan siler berbasis kalsium silikat dan siler berbasis kalsium silikat pozolan dengan aktivasi ultrasonik dan tanpa aktivasi ultrasonik terhadap dinding saluran akar.
Metode: Evaluasi kerapatan siler berbasis kalsium silikat dan kalsium silikat pozolan dengan aktivasi ultrasonik dan tanpa aktivasi ultrasonik terhadap dinding saluran akar pada 32 gigi premolar rahang bawah yang sudah diekstraksi yang dilihat dari persentase volume porositas pengisian saluran akar menggunakan dengan teknologi 3 dimensi Mikro-CT.
Hasil: Siler berbasis kalsium silkat pozolan yang diaktivasi ultrasonik menunjukkan kerapatan siler saluran akar terhadap dinding saluran akar terbaik.
Kesimpulan: Kerapatan siler berbasis kalsium silikat pozolan terhadap dinding saluran akar lebih baik dibandingkan siler berbasis kalsium silikat. Kerapatan siler yang diaktivasi ultrasonik terhadap dinding saluran akar juga lebih baik dibandingkan dengan yang tidak diaktivasi ultrasonik.
The latest technology of premixed calcium silicate pozzolan sealer with ultrasonic activation can reduce the porosity of root canal filling. Pozzolan reaction allows the sealer with better flow capacity with faster hardening time, especially with ultrasonic activation which will reduce the formation of porosity and increase sealing ability of root canal filling. Objective: Analyzing differences in sealing ability of calcium silicate-based sealers and calcium silicate pozzolan-based sealers with ultrasonic activation and without ultrasonic activation with 3D Micro-CT analysis. Methods: 32 samples of single rooted lower premolar were given root canal filling using gutta percha and calcium silicate-based sealers and with or without ultrasonic activation. Sealing ability was evaluated by measuring total porosity of the root canal filling. Group 1: calcium silicate-based sealer without ultrasonic activation, group 2: calcium silicate-based sealer with ultrasonic activation, group 3: calcium silicate pozzolan-based sealer without ultrasonic activation, and group 4: calcium silicate pozzolan-based sealer with ultrasonic activation. Result: Ultrasonic activated calcium silicate pozzolan-based showed the best sealing ability with lowest porosity. Conclusion: Calcium silicate pozzolan-based sealers have better sealing ability compared to calcium silicate-based sealers. The ultrasonic activated sealer groups also showed better sealing ability compared to the one that was not activated by ultrasonic."
Jakarta: Fakultas Kedokteran Gigi Universitas Indonesia, 2019
SP-pdf
UI - Tugas Akhir Universitas Indonesia Library
Cellen Syafira Putri
"Cangkang kelapa sawit (OPS) dapat digunakan secara optimal sebagai alternatif agregat kasar dengan tujuan untuk mengurangi limbah OPS dan menghemat biaya produksi. Beton dengan campuran OPS sebagai agregat kasar dengan semen portland komposit (PCC) telah banyak dilakukan pada penelitian terdahulu. Pada penelitian ini digunakan beton dengan cangkang kelapa sawit sebagai pengganti agregat dengan menggunakan semen portland pozzolan (PPC) untuk mengamati perbedaan karakteristik beton terhadap semen lainnya. Penelitian ini menganalisis karakteristik beton seperti kuat tekan, kuat tarik belah, permeabilitas, susut, kuat lentur, serta analisis respon struktur balok beton bertulang. Analisis respon struktur menggunakan sampel balok beton bertulang 15×25×300 cm3 yang diberi beban semi-siklik dengan metode pembebanan four point loading. Respon struktur yang diamati berupa perpindahan, regangan, dan pola retak balok diolah dari hasil pengujian menggunakan Digital Image Correlation (DIC) dan pengukuran manual menggunakan LVDT. Hasil eksperimen menghasilkan kuat tekan beton sebesar 8.73 MPa. Balok cangkang kelapa sawit (OPS) dengan semen portland pozzolan (PPC) dapat menerima beban hingga 6500 kg dan menghasikan lendutan hingga 30mm. Distribusi pola retak yang dihasilkan tersebar sepanjang balok dan dapat diamati menggunakan metode Digital Image Correlation (DIC). Hasil dari penelitian ini, beton campuran cangkang kelapa sawit (OPS) dengan semen portland pozzolan (PPC) tidak dapat digunakan sebagai komponen struktural karna menghasilkan kuat tekan beton yang rendah dan lendutan yang cukup besar.
Oil palm shells (OPS) can be used optimally as an alternative for coarse aggregate in purpose to reduce OPS waste and save production costs. OPS concrete with porland cement composite (PCC) has been widely used in previous studies. in this experiment, OPS used as a subtitue for coarse aggregate with Portland Pozzolan Cement (PPC) to observe the differences in the characteristis of concrete compared to other cements. This study analyzed the characterictis of concrete such as compressive strength, split tensile strength, permeability, shrinkage, flexural strength, as well as analysis of the structural response of reinforced concrete beams. Structural response analysis used a sample of reinforced concrete beams 15×25×300 cm3 which was given a semi-cyclic load using the four point load method. The observed structural responses in the form of displacement, strain, and beam crack patterns were processed from the test results using Digital Image Correlation (DIC) and measurements using LVDT. The compressive strength obtained from this experiment is 8.73 MPa. Reinforced beam with a mixture of of oil palm kernel shell (OPS) and portland pozzolan cement (PPC) were able to withstand loads up to 6500 kg and produce deflections of up to 30mm. The resulting crack pattern distribution is spread along the beam and can be observed using the Digital Image Correlation (DIC) method. The results of this study, concrete mixed with oil palm shells (OPS) with portland pozzolan cement (PPC) cannot be used as a structural component due to it low concrete compressive strength and a significant deflection."
Depok: Fakultas Teknik Universitas Indonesia, 2023
S-pdf
UI - Skripsi Membership Universitas Indonesia Library
