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第 175582 / 183048 页 · 当前展示 3,511,621–3,511,640 / 3,660,955 条匹配结果 · 摘要仅作预览

Structure of aluminosilicate melts produced from granite rocks for the manufacturing of petrurgical glass-ceramics construction materials

A. G. Simakin、T. P. Salova、M. Romero 等 4 位作者2001-12-01Materiales de Construccion

The aluminosilicate melt is a partly ordered phase and is the origin of glass for producing glassceramics and petrurgical materials. They are well extended used as construction materials for pavings and coatings. Its structure can be described in the terms of the aluminosilica tetrahedras coordination so-called Q spec…

Wastes based glasses and glass-ceramics

L. Barbieri、A. Corradi、I. Lancellotti2001-12-01Materiales de Construccion

Actually, the inertization, recovery and valorisation of the wastes coming from municipal and industrial processes are the most important goals from the environmental and economical point of view. An alternative technology capable to overcome the problem of the dishomogeneity of the raw material chemical composition i…

Trace elements based classification on clinkers. Application to Spanish clinkers

F. D. Tamás、J. Abonyi、F. Puertas2001-12-01Materiales de Construccion

The qualitative identification to determine the origin (i.e. manufacturing factory) of Spanish clinkers is described. The classification of clinkers produced in different factories can be based on their trace element content. Approximately fifteen clinker sorts are analysed, collected from 11 Spanish cement factories…

Combined Method for Quantitative Characterisation of Fluid Flow

Ivanov Yatchko、Kavardjikov Vasil、Pashkuleva Dessislava2001-12-01Applied Rheology

A method has been proposed for quantitative characterization of the flow behaviour of fluids, which is an important problem of applied rheology. Particle Image Velocimetry technique has been used for visualization and measurement of the velocity field. The rheometric study of the fluid is aimed at determining the char…

Fiftieth anniversary of the journal "Últimos Avances en Materiales de Construcción"

J. Calleja2001-12-01Materiales de Construccion

The aim of the author is to present an historical survey of the birth, growth and development along the fifty years of the life of the scientific and technical magazine MATERIALES DE CONSTRUCCIÓN, mainly devoted to cement and concrete matters. This has been intended in the present paper taking into account four period…

Secondary raw materials for synthesising new kind of cements

S. Goñi、A. Guerrero、M. A. Macías 等 5 位作者2001-12-01Materiales de Construccion

The present paper is a comparative study of some characteristics of new belite cements obtained from two kind of wastes, which were used as secondary raw materials: fly ash (FA), of low CaO content, from coal combustion, and ash from incineration of municipal solid waste (MSWIA). Cements were synthesised in a range of…

Editorial

Rolf Tarrach2001-12-01Materiales de Construccion

Non-Newtonian Fluid Flow Analysis with Finite Difference and Finite Volume Numerical Models

Marn Jure、Delic Marjan、Zunic Zoran2001-12-01Applied Rheology

Suitability of finite difference method and finite volume method for computation of incompressible non newtonian flow is analyzed. In addition, accuracy of numerical results depending of mesh size is assessed. Both methods are tested for driven cavity and compared to each other, to results from available literature an…

The Lodge Rubberlike Liquid Behavior for Cheese in Large Amplitude Oscillatory Shear

Wang Y.-C.、Gunasekaran S.、Giacomin A. J.2001-12-01Applied Rheology

The viscoelasticity of reduced-fat Cheddar and Mozzarella cheeses was characterized in small (parallel disk rheometer, go = 0.01) and large (sliding plate rheometer, 0.2< go <7) amplitude oscillatory shear at 40 and 60˚C. We deduced the linear relaxation spectrum from the small strain measurements. At large strain amp…

Towards the carbon fibers in the building industry

A. Miravete2001-12-01Materiales de Construccion

There are two mainstreams in the building industry in the area of carbon fibers: rehabilitation and use as building material. The using of carbon fiber as a building material is taking place slower than as rehab system due to the very low cost of traditional building materials, the limitations of composite structure m…

Designing concrete for durability

A. J. Boyd、S. Mindess、J. Skalny2001-12-01Materiales de Construccion

Some of the factors affecting the durability of modern concrete structures are discussed, with an emphasis on the problems caused by modern portland cements. This is followed by a description of some concrete durability issues of current interest, such as plastic shrinkage, seawater attack, and sulfate attack. The str…

Role of clay constituents in stone decay processes

F. Veniale、M. Setti、C. Rodríguez-Navarro 等 4 位作者2001-12-01Materiales de Construccion

Stone alterability/durability is depending upon a number of intrinsic and extrinsic factors among which "clay minerals" constituents, either diffused throughout the stone framework or as coating-filling of void spaces, can play an important role. Swelling-shrinking and aggregation-disaggregation phenomena occurring by…

Physico-mechanical properties of fabrics prepared from blends of sulphonated jute fibre with natural and synthetic fibres

Mohammed Ali、A. Jabber Mian、MM Islam 等 6 位作者2001-12-01Indian Journal of Fibre & Textile Research

The plain woven fabrics have been prepared from the blends of sulphonated jute fibre with natural and synthetic fibres, and their geometrical, physico-mechanical and drapping properties studied. It is observed that the blended fibre fabrics show improved textile properties, almost similar to those of the cotton fabric…

Textile materials and evaluationsMaterial Properties and Applications

Viability of utilization of waste materials from ceramic products in precast concretes

M. I. Sánchez de Rojas、F. P. Marín、M. Frías 等 4 位作者2001-12-01Materiales de Construccion

The recycled and re-valuation process of waste materials involves studies lead to a deep acknowledges of them, finding applications for their intended use. The waste materials from ceramic products can be recycled into the construction sector, as arid or pozzolanic materials. The current work deals with the incorporat…

Phase separation frustrated by the long-range Coulomb interaction. II. Applications

J. Lorenzana、C. Castellani、C. Di Castro2001-12-01Physical review. B, Condensed matter

The theory of first-order density-driven phase transitions with frustration due to the long-range Coulomb (LRC) interaction developed in paper I of this series is applied to the following physical systems: (i) the low-density electron gas, (ii) electronic phase separation in the low-density three-dimensional $t\ensure…

Physics of Superconductivity and MagnetismMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics

Renormalization of the Optical Response of Semiconductors by Electron-Phonon Interaction

M. Cardona2001-12-01physica status solidi (a)

In the past five years enormous progress has been made in the ab initio calculations of the optical response of electrons in semiconductors. The calculations include the Coulomb interaction between the excited electron and the hole left behind, as well as local field effects. However, they are performed under the assu…

Metallurgical and Alloy ProcessesAdvanced Materials and Semiconductor TechnologiesSemiconductor Quantum Structures and Devices

INDUSTRIAL CRYSTALLIZATION AND PRECIPITATION FROM SOLUTIONS: STATE OF THE TECHNIQUE

Marco Giulietti、Marcelo Martins Seckler、Silas Derenzo 等 5 位作者2001-12-01Brazilian Journal of Chemical Engineering

Crystallization and precipitation from solutions are responsible for 70% of all solid materials produced by the chemical industry. Competing with distillation as a separation and purification technique, their use is widespread. They operate at low temperatures with low energy consumption and yield with high purificati…

Process Optimization and IntegrationCrystallization and Solubility StudiesPetroleum Processing and Analysis

Production of stabilized Criegee intermediates and peroxides in the gas phase ozonolysis of alkenes: 1. Ethene, trans‐2‐butene, and 2,3‐dimethyl‐2‐butene

Alam S. Hasson、Grazyna E. Orzechowska、Suzanne E. Paulson2001-12-01Journal of Geophysical Research Atmospheres

Ozone‐alkene reactions generate stabilized Criegee intermediates (of the form R 1 R 2 COO), which are believed to react with water molecules to form organic hydroperoxides, hydrogen peroxide and carboxylic acids. These reactions are thought to be significant sources of these environmentally important compounds, yet bo…

Catalysis and Oxidation ReactionsCatalytic Processes in Materials ScienceChemical Reactions and Mechanisms

Syntheses of Silica/Polystyrene-block-Poly(ethylene oxide) Films with Regular and Reverse Mesostructures of Large Characteristic Length Scales by Solvent Evaporation-Induced Self-Assembly

Kui Yu、Alan J. Hurd、Adi Eisenberg 等 4 位作者2001-12-01Langmuir

Silica/diblock films with various mesostructures of large characteristic length scales were synthesized through evaporation-induced self-assembly (EISA). The structure-directing agents used were amphiphilic polystyrene- block -poly(ethylene oxide) (PS- b -PEO) diblock copolymers of high molecular weights. The synthesi…

Aerogels and thermal insulationSurfactants and Colloidal SystemsMesoporous Materials and Catalysis