نتایج جستجو برای: cement size classification

تعداد نتایج: 1044113  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

2011
L. P. Singh S. K. Agarwal S. K. Bhattacharyya U. Sharma S. Ahalawat

Spherical silica nanoparticles (n‐SiO2) with controllable size have been synthesized using tetraethoxysilane as starting material and ethanol as solvent by sol‐gel method. Morphology and size of the particles was controlled through surfactants. Sorbitan monolaurate, sorbitain monopalmitate and sorbitain monostearate produced silica nanoparticles of varying siz...

2014
Hong Jae Yim Jae Hong Kim

Coagulation of cement particles is an inevitable phenomenon of fresh cement-based materials undergoing solidification. Coagulation can be classified into two types, reversible flocculation and irreversible coagulation, wherein microstructural change affects the rheological properties, including shear thinning and thixotropy, and the hydration process. This paper attempts to measure the mechanic...

Journal: :Journal of biomaterials applications 2014
Antony Bou-Francis Alejandro López Cecilia Persson Richard M Hall Nikil Kapur

Understanding the cement injection behaviour during vertebroplasty and accurately predicting the cement placement within the vertebral body is extremely challenging. As there is no standardized methodology, we propose a novel method using reproducible and pathologically representative flow models to study the influence of cement properties on injection behaviour. The models, confined between an...

Journal: :Journal of orthopaedic research : official publication of the Orthopaedic Research Society 2008
Kenneth A Mann Mark A Miller Richard J Cleary Dennis Janssen Nico Verdonschot

Despite the widespread use of cement as a means of fixation of implants to bone, surprisingly little is known about the micromechanical behavior in terms of the local interfacial motion. In this work, we utilized digital image correlation techniques to quantify the micromechanics of the cement-bone interface of laboratory-prepared cemented total hip replacements subjected to nondestructive, qua...

2017
Ulrike Mueller Joern Reinders Sydney Smith-Romanski Jan Philippe Kretzer

Articulating spacers should be wear-resistant and load-bearing to avoid prolonged immobilization of the patient and to reduce morbidity. However, due to the articulation of both components, a release of cement wear particles is to be expected. The aim of this study was to investigate the wear performance of a new spacer cement that contains calcium carbonate as a radio-opaque substance, in comp...

2011
H. Lawluvi

This study is considered as an attempt for employing multivariate statistical analysis, such as multiple linear correlations, principal component analysis and cluster analysis, to infer the spatial distribution of elements in cement samples through which we can detect possible adulteration of the samples based on measured radioactivity and elemental levels. It was estimated on the bases of data...

Journal: :Acta orthopaedica 2008
Xun-Zi Cai Xian-Zhen Chen Shi-Gui Yan

BACKGROUND AND PURPOSE Antibiotic-impregnated cement is used as a spacer or during re-implantation surgery for the treatment of infected total hip arthroplasties. The routine use of antibiotic-impregnated cement during primary or uninfected revision total hip arthroplasty remains controversial. With this meta-analysis of the published literature, we intended to assess efficacy and safety in the...

Journal: :Journal of materials science. Materials in medicine 2007
Fred Kjellson Saba Abdulghani K E Tanner Ian D McCarthy Lars Lidgren

Iodixanol (IDX) is a water soluble opacifier widely used in radiographical examinations of blood vessels and neural tissue, and it has been suggested as a potential contrast media in acrylic bone cement. The effect of the iodixanol particle size on the polymerisation process of the bone cement, the molecular weight, and the quasi-static mechanical properties have been investigated in this artic...

2015
Bruno Cimatti Edgard Eduard Engel Marcello Henrique Nogueira-Barbosa Paulo Donato Frighetto José Batista Volpon

OBJECTIVE Macroporous cement with mechanical properties similar to cancellous bone may improve the treatment of large bone defects in relation to solid acrylic cement. The aim of this study was to compare physical and mechanical characteristics of a polymethyl methacrylate (PMMA) based porous cement with cancellous bone. METHODS Compressive strength and pore size, interconnectivity, and distr...

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