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dielectric properties of concrete and their influence on

Dielectric Materials for Compact Dielectric Resonator

1. Introduction. Dielectric resonators using high-permittivity materials were originally developed for microwave circuits, such as filters or oscillators as tuning element [].Indeed, in the late nineteen sixties, the development of low-loss ceramic materials opened the way for their use as high-Q elements [2-4].Then, making use of dielectric materials to create the dielectric resonator antenna

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GI - Dielectric characterization of vegetation at L band

Filali et al. (2006) developed an OECP for nondestructive measurements of concrete dielectric properties in the 100–900 MHz spectrum. OECPs are dimension dependent, and thus the radius of the inner conducting cylinder and the dielectric material determine the effective frequency range of the probe.

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Electrical Property-Based sensing of concrete: Influence

Electrical property based sensing of the properties of cement based materials is becoming increasingly popular. This paper reports the results of a systematic investigation carrie

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11 Factors that can Affect the Strength of Concrete

The properties of concrete generally rely on the mixing of concrete ingredients i.e. cement, coarse aggregates, fine aggregates (sand), and water. The whole world wishes their structure to be strong and durable and for that, they always design their structure according to the desired strength and service. Strength gives an overall indication of

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Dielectric properties of Ponderosa pine at high

Design of Concrete Mixtures, by (1949). Dielectric Properties of Douglas Fir at High Frequencies, by (1949). Dielectric Properties of Douglas Fir at High Frequencies. Influence of Utensils on Heat Transfer, by

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Quality and Durability of Concrete

Only their proper dosage and compatibility with different types of cement, if ensured, shall provide cohesive, workable concrete mix, which can be placed comfortably in the formwork and compacted well. Thus, production of good quality concrete, their proper placing, compaction and curing shall ensure longer life span of structure.

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Dielectric Strength: Units, Test Methods & Material Table

Dielectric Strength. Dielectric Strength reflects the electric strength of insulating materials at various power frequencies. Or it can be defined as the measure of dielectric breakdown resistance of a material under an applied voltage and is expressed as Volts per unit thickness. It is an indicator of how good an insulator a material is.

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Influence of (Glycine/Nitrate) Ratio on Structural and the

Influence of (Glycine/Nitrate) Ratio on Structural and the Magnetic Properties of Gd3Fe5O12 S.I. El-Dek, S.F. Mansour, N. Okasha, M.A. Ahmed Gadolinium iron garnet (GdIG) Gd3Fe5O12 was prepared using the autocombustion method with glycine as fuel. The GdIG samples revealed single phase garnet with cubic symmetry. The effect of (glycine/ nitrate) ratio on the structural and []

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Properties of concrete - Wikipedia

Concrete tests can measure the "plastic" (unhydrated) properties of concrete prior to, and during placement. As these properties affect the hardened compressive strength and durability of concrete (resistance to freeze-thaw), the properties of workability (slump/flow), temperature, density and age are monitored to ensure the production and

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Influence of Crushed Coarse Aggregates on Properties of

Both coarse aggregates and fine aggregates are the main constituents of concrete because they not only give the body to the concrete, it also have a significant effect on the fresh concrete based on aggregate's shape, size, texture, grading and crushing type. Moreover it is proved that aggregate's types has the severe effect on physic-mechanical properties of concrete as aggregate covered

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PDF Electrical Properties of Cable Insulation Materials

Electrical Properties of Polyolefins Poly Olefin Structure and Dielectric Behavior • Dielectric constant can be expressed for these nearly non-polar polymers by an expression of the form: e = A + B(d - da) Where, B is a constant, d is the density and da is the density at which the dielectric constant is equal to A.

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The dielectric properties of skin and their influence on

The dielectric properties of skin and their influence on the delivery of tumor treating fields to the torso: a study combining in vivo measurements with numerical simulations Phys Med Biol . 2019 Sep 19;64(18):185014. doi: 10.1088/1361-6560/ab33c6.

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Concrete Hygrothermal Properties and the Influence of

The variability of measured hygrothermal properties was clarified. Then, to evaluate the influence that the variability of hygrothermal properties has on the hygrothermal behaviors of a concrete wall, a water absorption experiment using a small-scale concrete wall with tile

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What is the composition of concrete? - Quora

Composition of concrete Many types of concrete are available, distinguished by the proportions of the main ingredients below. In this way or by substitution for the cementitious and aggregate phases, the finished product can be tailored to its app

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What is Concrete Strength and what are the factors

By Er. Kaushal Kishore , Materials Engineer, Roorkee Concrete Strength Cement like water, aggregates and some times admixtures is one of the ingredient of concrete. The mixing of these materials in specified proportions produces concrete. Accordingly cement alone is not a building material, it is the concrete which is a building material. For a given []

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Dielectric properties of high density polyethylene-nano

O. GOUDA, A.S. HAIBA Abstract. Recently, polymer Nano-composites have been used for various important industrial applications. This paper studies the dielectric properties of high density polyethylene HDPE composed with different concentrations of Clay-Nano-Filler over a frequency range of 200 Hz-2 MHz. The experimental results show that 6% filler concentration is the optimum clay content for

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State of the art – Methods to measure moisture in concrete

The moisture can be regarded in the following two main categories in concrete: As a concentration (mass per volume) and as pore relative humidity. Both categories are related by moisture isotherms. The concrete pore structure influences its physical properties, particularly in terms of permeability and strength.

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Search results for: Physicochemical properties

This paper studies the hygrothermal aging effect on the mechanical properties of fiber reinforced plastics laminates at 40 °C in different environment exposure. Two composite materials are used to conduct the study (carbon fiber/epoxy and glass fiber/vinyl ester with two stratifications

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Industrial glass - Properties of glass | Britannica

Industrial glass - Industrial glass - Properties of glass: At ordinary temperatures, glass is a nearly perfect elastic solid, an excellent thermal and electrical insulator, and very resistant to many corrosive media. (Its optical properties, however, vary greatly, depending on the light wavelengths employed.) The more or less random order of atoms is ultimately responsible for many of the

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Dielectric Constants of various materials

Dielectric Constant (k) is a number relating the ability of a material to carry alternating current to the ability of vacuum to carry alternating current. The products in this reference are listed in alphabetical order and are grouped in sections by the first letter of their name. Proper chemical names were used, and any trade names are the

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Influence of Magnetite Nanoparticles on Mechanical and

tive influence of high temperatures on mechanical properties of concrete [12]. The aim of the work - is a study of physi-co-chemical properties of magnetite nanoparticles that obtained by chemical condensation method. Investigation of magnetite addition effect on me-chanical and shielding properties from microwave radiation was carried out. 2.

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PDF Classification of Magnetic Materials

Under the influence of an applied field (H) the spinning electrons precess and this motion, which is a type of electric current, produces a magnetisation (M) in the opposite direction to that of the applied field. All materials have a diamagnetic effect, however, it is often the case that the diamagnetic

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What are the Factors Affecting Workability of Concrete?

The primary materials of concrete are cement, fine aggregates (sand), coarse aggregates and water. Many times admixtures are used in concrete to enhance its properties. Therefore, properties of these materials and their content affect the workability of concrete. Following are the general factors affecting concrete workability:

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What are dielectric materials? - Properties, applications

Dielectric properties of materials are defined as a molecular property that is fundamental in all the materials that are capable of impending electron movement resulting in polarization within the material on exposure to an external electric field.

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Types of Admixtures for Concrete - The Concrete Network

Mineral admixtures make mixtures more economical, reduce permeability, increase strength, and influence other concrete properties. Mineral admixtures affect the nature of the hardened concrete through hydraulic or pozzolanic activity. Pozzolans are cementitious materials and include natural pozzolans (such as the volcanic ash used in Roman

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PDF List of dielectric constants - VEGA

List of dielectric constants Substance Substanz Dielectric Constant Glycol Glykol 37,0 Glysantin Glysantin 25,0 Grain grist Getreideschrot 3,0 Grain of mustard seed Senfkörner 3,6 Grain of soy Soja-Schrot 2,9 Granuform Granuform 4,0 Gravel Kies 2,6 Green vitriol Ferrosulfat (80°C) 32,4 Guaiacol Guajakol 11,0 Guano Guano (Rohphosphat) 2,5

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