Results 121 to 130 of about 12,162 (308)

High‐strength composites by thiocracking of high‐polypropylene‐content mixed waste

Polymer International, EarlyView.
Mixed plastic waste made up of polystyrene and polypropylene was reacted with elemental sulfur to give high‐strength composites. Abstract Mixed‐material municipal waste poses a persistent end‐of‐life management challenge because the heterogeneous composition limits efficient separation and recycling. After disposal, mixed‐material waste often fragments
Athira Babu, Rhett C. Smith
wiley   +1 more source

Grau de conversão de um compósito restaurador pré-aquecido, empregado como agente de cimentação: uma avaliação por espectroscopia FTIR [PDF]

, 2012
Tese (doutorado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Florianópolis, 2011O objetivo deste trabalho foi avaliar o grau de conversão de um compósito restaurador micro-híbrido pré ...
Melo, Tiago Spezia de
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Effect of curing modes on micro-hardness of dual-cure resin cements

Restorative Dentistry & Endodontics, 2011
Objectives The purpose of this study was to evaluate curing degree of three dual-cure resin cements with the elapsed time in self-cure and dual-cure mode by means of the repeated measure of micro-hardness.
Ki-Deok Lee,, Se-Hee Park, Jin-Woo Kim, Kyung-Mo Cho   +3 more
doaj   +1 more source

Recycling of Mill Scale Into High‐Purity Iron Through Hydrogen‐Based Reduction

steel research international, EarlyView.
Mill scale, an iron oxide–rich steel by‐product, is difficult to recycle due to impurities. This study evaluates hydrogen‐based direct reduction and hydrogen plasma smelting reduction as low‐carbon recycling routes. Impurity segregation limits reduction kinetics. Direct reduction achieves 92% conversion in 180 min, while plasma reduction reaches 91% in
Nathalia C. Verissimo, Anumoy Ganguly, Lucas Varoto, Tim M. Schwarz, Jean‐Baptiste Letz, Ubaid Manzoor, Laurine Choisez, Dierk Raabe, Isnaldi R. Souza Filho   +8 more
wiley   +1 more source

Comparison of the amount of fluoride release from nanofilled resin modified glass ionomer, conventional and resin modified glass ionomer cements.

Frontiers in Dentistry, 2013
To investigate and compare the amount of fluoride release of conventional, resin modified and nanofilled resin modified glass ionomer cements.Tablets of glass-ionomer cements were immersed in deionized water and incubated at 37°C.
Sumitha Upadhyay, Arathi Rao, Ramya Shenoy   +2 more
doaj  

Foamed Concrete Sealing Materials for Coal Seam Gas Drainage Boreholes: A Review

Safety Science and Technology, EarlyView.
This study investigates the sealing performance of foamed concrete in gas drainage boreholes. By comparing leakage pathways (a, c) with sealed systems (b, d), the research demonstrates how foamed concrete effectively fills mining‐induced fractures and resists deformation.
Jiaxing Zou, Erlei Su, Huanchun Liu, Xiangjun Chen, Lin Wang, Haidong Chen, Lin Li   +6 more
wiley   +1 more source

Performance analysis of strengthening reinforced concrete beams under pure torsion using galvanized steel sheets: Experimental and numerical investigation

Structural Concrete, EarlyView.
Abstract Reinforced concrete (RC) beams can be subjected to torsion, and failure due to torsion is brittle and poses a significant risk to occupants. Moreover, strengthening of existing RC beams in torsion may be required due to the upgrade of the structures or as part of structural rehabilitation.
Ahmed Hamoda, Mizan Ahmed, Ahmad G. Saad, Aref A. Abadel, Saad A. Yehia   +4 more
wiley   +1 more source

Influência de diferentes técnicas e agentes de cimentação na resistência adesiva da cerâmica à dentina [PDF]

, 2012
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Florianópolis, 2009Este estudo teve como objetivo avaliar a influência da técnica de cimentação e do uso de agentes ...
Espina, Lívia Teichmann
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Numerical analysis of debonding behavior of FRP sheets bonded to concrete focusing on mortar skin

Structural Concrete, EarlyView.
Abstract This paper proposes a novel simple method for finite element analysis (FEA) to simulate the debonding behavior of fiber‐reinforced polymer (FRP) sheets bonded to concrete. This study focuses on the mortar skin of the concrete surface layer, which fails during FRP sheet debonding.
Mitsuhiko Ozaki, Yasuhiko Sato
wiley   +1 more source

Resistência flexural de duas resinas provisórias : comparação dos testes uniaxial e biaxial [PDF]

, 2013
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Odontologia, Florianópolis, 2013.Abstract : The aim of this in vitro study was to evaluate the flexural strength of the resin ...
Rosa, Leandro Iran
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