Results 31 to 40 of about 73,102 (307)

Natural Stone Waste Powders Applied to SCC Mix Design [PDF]

, 2008
In order to comply with current trends concerning sustainability, saving of primary materials and energy\ud savings, this paper addresses Eco-concrete. The major focus thereby is on the increased efficiency of cement\ud use.
Brouwers, H.J.H., Hunger, M.
core   +3 more sources

Research on a Defects Detection Method in the Ferrite Phase Shifter Cementing Process Based on a Multi-Sensor Prognostic and Health Management (PHM) System

Sensors, 2016
The cementing manufacturing process of ferrite phase shifters has the defect that cementing strength is insufficient and fractures always appear. A detection method of these defects was studied utilizing the multi-sensors Prognostic and Health Management
Bo Wan, Guicui Fu, Yanruoyue Li, Youhu Zhao   +3 more
doaj   +1 more source

Effect of Cleaning the Annular Space on the Adhesion of the Cement Sheath to the Rock

Energies, 2021
Drilling boreholes in gas zones and in zones with the possibility of migration or gas exhalation requires a high index of well tightness. An important parameter determining the effectiveness of sealing the annular space is the adhesion of the cement ...
Marcin Kremieniewski, Sławomir Błaż, Stanisław Stryczek, Rafał Wiśniowski, Andrzej Gonet   +4 more
doaj   +1 more source

Análisis técnico de la cementación del revestidor superficial de pozos petroleros del centro oriente, septiembre 2013 [PDF]

, 2014
Objetivo General: Realizar un análisis técnico de la cementación del revestidor superficial de pozos petroleros del Centro Oriente. Problema: Por no tener una cementación hasta superficie del revestidor superficial de pozos petroleros perforados en el ...
Aza Freire, Jacqueline Andrea, Mendoza Terán, Miguel Arturo   +1 more
core  

Is Young's Modulus a Critical Coating Property Determining Fouling‐Release Performance of Marine Coatings?

Advanced Engineering Materials, EarlyView.
The release of foulers from protective marine coatings is determined by several interrelated material properties, including the strength of Young's modulus, the flexibility of chain segments, the surface free energy, and the magnitude of hydrodynamic stress.
Johann C. Schaal, Andreas Brinkmann, Andreas Hartwig   +2 more
wiley   +1 more source

Histological evidence for a supraspinous ligament in sauropod dinosaurs [PDF]

, 2015
Supraspinous ossified rods have been reported in the sacra of some derived sauropod dinosaurs. Although different hypotheses have been proposed to explain the origin ofthis structure, histological evidence has never been provided to support or reject any
Abdalla O, Abdel Meguid EM, Barreto C, Bonaparte JF, Bonaparte JF, Campos D, Casal GA, Casal GA, Cerda IA, Cerda IA, Chinsamy A, Chinsamy-Turan A, Francillon-Vieillot H, García RA, Giménez O, Gomani M, Güner A, Hamdam TA, Hatcher JB, Henderson D, Heylings DJA, Horner JR, Janensch W, Janensch W, Kellner AWA, Mcintosh JS, Morocutti M, Novas FE, Osborn HF, Powell JE, Powell JE, Powell JE, Reid REH, Sandqvist AV, Strocchi R, Yayama T, You H-L, Zhang Y   +37 more
core   +2 more sources

Influence of Sample Preparation and Processing Procedures on the Thermal Diffusivity of MgO‐C Refractories

Advanced Engineering Materials, EarlyView.
The thermal diffusivity of MgO‐C refractories is highly sensitive to sample preparation and processing procedures. In this article, the effects of coking sequence, machining conditions, structural inhomogeneity, and graphite coating application on measurements using laser flash apparatus are systematically investigated.
Luyao Pan, Rhena Wulf, Till M. J. Stadtmüller, Christos G. Aneziris, Tobias M. Fieback   +4 more
wiley   +1 more source

Low Thermal Conductivity Cement Slurry for Geothermal Well Cementing

Zuanjingye yu wanjingye
In geothermal energy development, the heat loss of cement sheath plays a key role in affecting heat extraction efficiency. In this study, using class G cement as the base slurry, and hollow glass microspheres and modified palygorskite fiber as composite ...
Donghong DANG, Zhongwei HUANG, Jingbin LI, Jingli LIU, Qiang REN, Yan LIU   +5 more
doaj   +1 more source

Exploration on Intelligent Technology of Cementing Wellhead Device

Shiyou jixie, 2022
As the oil and gas exploration and development continuously stride forward towards deep wells, ultra-deep wells and deep-water areas, the cementing operations are faced with practical security risks such as high construction pressure, high operation risk
Dai Wenchao, Hu Liang, Wang Chao, Yin Huibo   +3 more
doaj  

Mechanically Tunable Bone Scaffolds: In Vivo Hardening of 3D‐Printed Calcium Phosphate/Polycaprolactone Inks

Advanced Functional Materials, EarlyView.
A 3D bone scaffold with osteogenic properties and capable of hardening in vivo is developed. The scaffold is implanted in a ductile state, and a phase transformation of the ceramic induces the stiffening and strengthening of the scaffold in vivo. Abstract Calcium phosphate 3D printing has revolutionized customized bone grafting.
Miguel Mateu‐Sanz, Pablo Varela, Laura del‐Mazo‐Barbara, Irene Lodoso‐Torrecilla, Emilio Jiménez‐Piqué, Jordi Franch, Miguel Alaminos, Maria‐Pau Ginebra   +7 more
wiley   +1 more source