نتایج جستجو برای: cement size classification

تعداد نتایج: 1044113  

Journal: :Intek : Informasi Teknologi : Jurnal Penelitian 2022

Soil improvement is commonly carried out in construction work with the aim of increasing bearing capacity / strength soil so that it can carry load will stand on it. The method often used stabilization addition materials. In this study, was Portland Cement. This research begins sampling and laboratory testing to determine physical mechanical properties soil, followed by making samples for Uncon...

2018
Yan-Sheng Huang Chao-Yuan Ge Hang Feng Hai-Ping Zhang Xing-Bang Niu Shao-Yan Shi Zi-Qi Zhu Ding-Jun Hao

BACKGROUND This study aimed to explore the feasibility and efficacy of bone cement-augmented short-segmental pedicle screw fixation in treating Kümmell disease. MATERIAL AND METHODS From June 2012 to June 2015, 18 patients with Kümmell disease with spinal canal stenosis were enrolled in this study. Each patient was treated with bone cement-augmented short-segment fixation and posterolateral bon...

2011
A. Iqbal N. Ehsan M. I. Khan I. Ashraf

This research entails the extent of up-gradation of Dandot coal, using conventional gravity based sink-float separation techniques, to make it technoeconomically acceptable for the cement industry as a partial substitution of imported coal. In this research, various sizes of run-of-mine coal samples were subjected to specific gravity based sink-float test and resultant fractions were analyzed. ...

2016
Yong Yu Han Zhu

Studies on the properties and applications of rubber cement-based materials are well documented. The sizes of rubbers used in these materials varied. However, information about the effects of rubber size on the properties of rubber cement-based materials, especially pore structure, mechanical strengths, and drying shrinkage properties, remains limited. Three groups of rubber with major particle...

Journal: :Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery 2005
D J Verret Yadranko Ducic Lance Oxford Jesse Smith

OBJECTIVES To evaluate the long-term efficacy of hydroxyapatite cement in craniofacial reconstruction, specifically examining the role (if any) of radiation, implant location, and cement type. STUDY DESIGN A retrospective chart review was conducted of all patients presenting to the senior surgeon (Y.D.) for craniofacial reconstruction from September 1997 to April 2004. METHODS Data were col...

2011
Gianluca Tozzi Qinghang Zhang Colin Lupton Jie Tong

INTRODUCTION The lasting integrity of the bond between the bone and the cement is essential to the success and longevity of cemented total hip replacements [1]. It is well known how the strength of the bone-cement interface is related to the amount of bone interdigitated with the cement [2] and although numerous studies have been carried out on bone-cement interfacial strength at the continuum ...

Journal: :Journal of orthopaedics 2016
Omar Ali Abouazza Finbarr Condon Ailish Hannigan Colum Dunne

AIMS To develop a Glass Polyalkenoate Cement that is suitable for vertebroplasty. METHODS Testing was carried out to assess the effect of gamma irradiation used for sterilisation, on the glass transition temperature as well as its mechanical properties, including compressive strength and biflexural strength in vivo as well as testing GPC and PMMA cements post injection in cadaveric human vert...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2016
Katerina Ioannidou Konrad J Krakowiak Mathieu Bauchy Christian G Hoover Enrico Masoero Sidney Yip Franz-Josef Ulm Pierre Levitz Roland J-M Pellenq Emanuela Del Gado

Strength and other mechanical properties of cement and concrete rely upon the formation of calcium-silicate-hydrates (C-S-H) during cement hydration. Controlling structure and properties of the C-S-H phase is a challenge, due to the complexity of this hydration product and of the mechanisms that drive its precipitation from the ionic solution upon dissolution of cement grains in water. Departin...

2016
Fang Zhang Junjie Wu Damian Ward

China’s cement production has been the highest worldwide for decades and contributes significant environmental pollution. Using a non-radical DEA model with slacks-based measure (SBM), this paper analyzes the environmental efficiency of China’s listed cement companies. The results suggest that the average mean of the environmental efficiency for the listed cement enterprises shows a decreasing ...

2015
Martha Geffers Jürgen Groll Uwe Gbureck

Calcium phosphate biocements based on calcium phosphate chemistry are well-established biomaterials for the repair of non-load bearing bone defects due to the brittle nature and low flexural strength of such cements. This article features reinforcement strategies of biocements based on various intrinsic or extrinsic material modifications to improve their strength and toughness. Altering partic...

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