Solid Waste-silica Composite for High Strength and Lightweight Material Application

The solid waste composite was successfully made. Preliminary, the composite was synthesized using polyurethane as binder mixed with the solid waste using simple mixing method and then hot-pressed at at pressure of 4 metric-tons and temperature of 100°C for 20 minutes. To enhance its strength, silica nanoparticles with varied content then were added in the polyurethane-solid waste mixture. From the compressive strength test, it was obtained that polyurethane-solid waste composite with solid waste volume fraction of 87.15% had optimum compressive strength of 160 MPa. Meanwhile, for silica addition with the fraction of 0.4975%, the compressive strength became 200 MPa, or increased 23% of that without nanosilica. The enhancement was also briefly confirmed from FTIR Spectroscopy where some polyurethane spectra shifted small due to silica addition, especially in amine and carbonyl groups as its active groups. The strength is better than of brick (80 MPa), shalestone (73 MPa), silstone (92 MPa) and other stones. From density measurement, the composite-produced has density about 0.7 g/cm3 that comparable to Jati (Tectona grandis) and Mahoni (Swietenia macrophylla) having densities about 0.8 g/cm3 and 0.7 g/cm3 respectively. Therefore, this composite is very adequate for building material application to compete the woods. Komposit sampah sudah berhasil dibuat. Mula-mula, komposit disintesis dengan menggunakan poliuretan sebagai pengikat yang dicampur dengan sampah melalui metode pencamnpuran sederhana (simple mixing), kemudian dihot-press pada tekanan 4 metric ton dan suhu 100°C selama 20 menit. Untuk meningkatkan kekuatan mekaniknya, nanopartikel silica dengan berbagai komposisi ditambahkan dalam campuran poliuretan-sampah. Dengan menggunakan uji kekuatan tekan, didapatkan komposit poliuretan-sampah dengan fraksi volume sampah sebesar 87,15% memiliki kekuatan tekan sebesar 160 MPa. Selanjutnya, dengan penambahan silica sebesar 0,4975% (v/v) kekuatan tekan komposit menjadi 200 MPa, atau meningkat sebesar 23% dibandingkan komposit tanpa silica. Peningkatan ini juga dikonfirmasi melalui FTIR Spectroscopy yang menunjukkan adanya pergeseran kecil pada puncak spektra poliuretan akibat penambahan silica, utamanya pada gugus fungsi amina dan karbonil. Kekuatan mekanik komposit ini lebih baik daripada batu bata (80 MPa), batuan shale (73 MPa), batuan siltstone (92 MPa) dan beberapa jenis batuan yang lain. Dengan menggunakan uji kerapatan didapatkan komposit ini memiliki massa jenis 0,7 g/cm3, setara dengan kayu Jati (Tectona grandis) dan Mahoni (Swietenia macrophylla) yang memiliki massa jenis masing-masing 0,8 g/cm3 dan 0,7 g/cm3. Ini menunjukkan komposit yang dihasilkan sangat cocok untuk diaplikasikan sebagai bahan bangunan pengganti kayu

Fra restråstoff til verdifulle råvarer

Laying hens are commonly not slaughtered and utilized for food purpose. Slaughtered hens may be hydrolyzed (e.g. at 50°C for 1-2 hours, with additions of enzymes)to produce soluble proteins and oils. Sediments after such hydrolysis are valuable fertilizers, whereas the oil and proteins are valuable food ingredients of high quality

Process Makes Perfect: Asking Your Target Audience What They Really Want To Know About You

Libraries often find themselves communicating programs and services to different audiences — students, faculty, donors and the community. So what happens when you are tasked with creating a marketing piece to pique donors’ interest? How do you know what they want to know about you, and what do they already know? Accurately assessing what your audience already understands about your library services can be a challenging aspect of your project. This column describes how an academic library in Ohio learned more about its target market to create a piece that could bring about the results it wanted

2014 Art for Citizens and Celebrants: The Sculpture of Robert C. Koepnick

This exhibit booklet highlights artwork within the 2014 University of Dayton Libraries gallery exhibit

International Film Critic to Speak on \u27Religious Images and Themes in Contemporary Film\u27 at University of Dayton

News release announces that Rev. Peter Malone will be at the University of Dayton to talk on Religious Images and Themes in Contemporary Film

University of Dayton to Honor Human Rights Lawyer with Inaugural Monsignor Romero Award April 11

News release announces that Juan Méndez will be at the University of Dayton to accept the school\u27s inaugural Monsignor Romero Award for Leadership in Service to Human Rights

2015 Roesch Library The Go-To Place on Campus: photo hunt

Groups of three to five students take a packet of clues that leads them to spaces on all eight floors of the library to take photos on their phones

2014 Roesch Library The Go-To Place on Campus: Spaces and Services

Roesch Library spaces and services brochure for first-year and international students learning about library services