Results 31 to 40 of about 7,377 (159)

A influência do tipo de cimento na resistência à compressão simples de uma areia artificialmente cimentada

Geotecnia, 2012
Atécnica de melhoramento de solos de baixa capacidade de suporte utilizando cimento Portland tem sido empregada em vários países pelo mundo. O conhecimento dos fatores que influenciam o desempenho de um solo melhorado é de fundamental importância para ...
Jonatan Jonatan, Fernanda Stracke, Eduardo Korf, Nilo Consoli   +3 more
doaj   +1 more source

Comparative Analysis of Selected Physicochemical Properties of Pozzolan Portland and MTA‐Based Cements

International Scholarly Research Notices, Volume 2014, Issue 1, 2014., 2014
Physicochemical properties of pozzolan Portland cement were compared to ProRoot MTA and MTA BIO. To test the pH, the samples were immersed in distilled water for different periods of time. After the pH analysis, the sample was retained in the plastic recipient, and the electrical conductivity of the solution was measured. The solubility and radiopacity
Maura Cristiane Gonçales Orçati Dorileo, Ricardo Dalla Villa, Orlando Aguirre Guedes, Andreza Maria Fábio Aranha, Alex Semenoff-Segundo, Matheus Coelho Bandeca, Alvaro Henrique Borges, Antonio Tilocca   +7 more
wiley   +1 more source

The Lock‐In Effect on ESG and Business Performance Relationship: A Critical Examination and Meta‐Analysis

Corporate Social Responsibility and Environmental Management, Volume 32, Issue 5, Page 6912-6936, September 2025.
ABSTRACT This study investigates whether the issues previously addressed in the literature regarding business performance persist when applying ESG practices. A literature review identified 252 effects, followed by a meta‐analysis with subgroup analysis. The lock‐in theory and corporate reputation were employed to understand this relationship. The lock‐
Jéssica Alessandra Mendonça, Fabíola Renata Alves Roberto, Dalton Alexandre Kai, Guilherme Brittes Benitez   +3 more
wiley   +1 more source

Effect of Zirconium Oxide and Zinc Oxide Nanoparticles on Physicochemical Properties and Antibiofilm Activity of a Calcium Silicate‐Based Material

The Scientific World Journal, Volume 2014, Issue 1, 2014., 2014
The aim of the present study was to evaluate the antibiofilm activity against Enterococcus faecalis, compressive strength. and radiopacity of Portland cement (PC) added to zirconium oxide (ZrO2), as radiopacifier, with or without nanoparticulated zinc oxide (ZnO). The following experimental materials were evaluated: PC, PC + ZrO2, PC + ZrO2 + ZnO (5%),
Juliane Maria Guerreiro-Tanomaru, Adinael Trindade-Junior, Bernardo Cesar Costa, Guilherme Ferreira da Silva, Leonardo Drullis Cifali, Maria Inês Basso Bernardi, Mario Tanomaru-Filho, Cornelis H. Pameijer   +7 more
wiley   +1 more source

An injector testbed based on a direct current gun and an interchangeable very high frequency gun for superconducting continuous‐wave free‐electron lasers

Journal of Synchrotron Radiation, Volume 32, Issue 4, Page 838-848, July 2025.
An injector testbed for continuous‐wave free‐electron lasers based on a direct current gun and an interchangeable very high frequency gun is under construction. Its physical design and performance have been studied carefully.The continuous‐wave free‐electron laser (CW‐FEL), based on superconducting radiofrequency (SRF) technology with an electron bunch
Xinmeng Li, Jitao Sun, Yong Yu, Jiahang Shao, Jiayue Yang, Quan Zhou, Hongli Ding, Lei Shi, Kai Tao, Chenglin Guo, Zhigang He, Zhichao Chen, Zhen Chen, Shaohua Peng, Hongfei Wang, Guoqing Zhang, Baichao Zhang, Zongbin Li, Feng Zhao, Wei Wei, Maomao Huang, Wei Wang, Ming Liu, Chaofeng He, Liangbing Hu, Yaqiong Wang, Han Li, Weiming Yue, Xilong Wang, Guorong Wu, Dongxu Dai, Weiqing Zhang, Xueming Yang   +32 more
wiley   +1 more source

Analysis of Metal Contents in Portland Type V and MTA‐Based Cements

The Scientific World Journal, Volume 2014, Issue 1, 2014., 2014
The aim of this study was to determine, by Atomic Absorption Spectrometry (AAS), the concentration levels of 11 metals in Type V gray and structural white PC, ProRoot MTA, and MTA Bio. Samples, containing one gram of each tested cement, were prepared and transferred to a 100 mL Teflon tube with a mixture of 7.0 mL of nitric acid and 21 mL of ...
Maura Cristiane Gonçales Orçati Dorileo, Matheus Coelho Bandeca, Fábio Luis Miranda Pedro, Luiz Evaristo Ricci Volpato, Orlando Aguirre Guedes, Ricardo Dalla Villa, Mateus Rodrigues Tonetto, Alvaro Henrique Borges, Sandra Rivera Fidel   +8 more
wiley   +1 more source

Bir İşletmeye Ait Yardımcı Tesislerin Enerji Tüketimi ve Verimliliğinin İncelenmesi

Düzce Üniversitesi Bilim ve Teknoloji Dergisi, 2022
Bu çalışmada, bir çimento fabrikasında mevcut olan yardımcı işletmeler kısmının enerji tüketimleri incelenmiştir. Yardımcı işletmeler kısmı; kazan dairesi, kompresör dairesi, soğutma havuzu, idari bina, merkezi kontrol binası ve atölyeleri kapsamaktadır.
Elif Öğüt, Özge Cura
doaj  

Fracture and Damage Analysis of Cement‐Stabilized Fine and Coarse Grain Soils Under Static and Cyclic Loading Using Chevron‐Notched SCB Specimen

Fatigue &Fracture of Engineering Materials &Structures, Volume 48, Issue 6, Page 2708-2724, June 2025.
ABSTRACT Fracture toughness and cohesive fracturing properties of two classes of sandy‐clay soils, (A) with fine and (B) coarse grains and stabilized with low (2%) and high (10%) cement (as soil stabilizer), were investigated using a chevron‐notched semicircular bend (CN‐SCB) sample under static and cyclic loads.
Nazife Erarslan, M. R. M. Aliha
wiley   +1 more source

Analysis of the Behavior of Carbon Nanotubes on Cementitious Composites

International Scholarly Research Notices, Volume 2013, Issue 1, 2013., 2013
Nanotechnology has brought significant innovations in science and engineering. Carbon nanotube has been considered a new and outstanding material in nanoscience field with great potential application in the construction industry. The main objective of this study is to analyze the behavior of cementitious materials produced with the insertion of carbon ...
Jorge Fernandes de Morais, Assed Naked Haddad, Laia Haurie, A. M. Ali, R. Azimirad, J. Bai, Z. Jiang, Z.-M. Liao   +7 more
wiley   +1 more source

Variáveis-chave no controle da resistência mecânica de misturas solo-cimento

Geotecnia, 2007
Freqüentemente, a utilização de técnicas tradicionais da engenharia geotécnica depara-se com obstáculos de caráter econômico e ambiental. A técnica do solo-cimento torna-se atrativa quando o melhoramento das propriedades do solo do local constitui-se ...
Diego Foppa, Lucas Festugato, Nilo Consoli, Karla Heineck, António Viana da Fonseca   +4 more
doaj   +1 more source