Water Content Effect on the Dielectric Properties of Cellular Concrete Material

2013 ◽  
Vol 1 (2) ◽  
pp. 12
Author(s):  
M. D. Belrhiti ◽  
S. Bri ◽  
A. Nakheli ◽  
A. Mamouni
Keyword(s):  
Dielectric Properties ◽  
Water Content ◽  
Concrete Material ◽  
Cellular Concrete

Effect of water content on microwave dielectric properties of building materials

2020 ◽  
Vol 263 ◽  
pp. 120107
Author(s):  
Romain Damez ◽  
Philippe Artillan ◽  
Arthur Hellouin de Menibus ◽  
Cédric Bermond ◽  
Pascal Xavier
Keyword(s):  
Dielectric Properties ◽  
Water Content ◽  
Building Materials ◽  
Microwave Dielectric Properties ◽  
Effect Of Water ◽  
Microwave Dielectric

scholarly journals Snow dielectric properties: from DC to microwave X-band

1994 ◽  
Vol 19 ◽  
pp. 92-96 ◽  
Author(s):  
TH. Achammer ◽  
A. Denoth
Keyword(s):  
Grain Size ◽  
Dielectric Properties ◽  
Water Content ◽  
Liquid Water ◽  
Liquid Water Content ◽  
Frequency Range ◽  
Snow Density ◽  
Cold Room ◽  
X Band ◽  
Grain Size And Shape

Broadband measurements of dielectric properties of natural snow samples near or at 0°C are reported. Measurement quantities are: dielectric permittivity, loss factor and complex propagation factor for electromagnetic waves. X-band measurements were made in a cold room in the laboratory; measurements at low and intermediate frequencies were carried out both in the field (Stubai Alps, 3300 m; Hafelekar near Innsbruck, 2100 m) and in the cold room. Results show that in the different frequency ranges the relative effect on snow dielectric properties of the parameters: density, grain-size and shape, liquid water content, shape and distribution of liquid inclusions and content of impurities, varies significantly. In the low-frequency range the influence of grain-size and shape and snow density dominates; in the medium-frequency range liquid water content and density are the dominant parameters. In the microwave X-band the influence of the amount, shape and distribution of liquid inclusions and snow density is more important than that of the remaining parameters.

scholarly journals Effect of water content on the dynamic measurement of dielectric properties of food snack pellets during microwave expansion

2018 ◽  
Vol 232 ◽  
pp. 21-28 ◽  
Author(s):  
José D. Gutiérrez-Cano ◽  
Ian E. Hamilton ◽  
José M. Catalá-Civera ◽  
John Bows ◽  
Felipe L. Peñaranda-Foix
Keyword(s):  
Dielectric Properties ◽  
Water Content ◽  
Dynamic Measurement ◽  
Effect Of Water

Mesure des propriétés diélectriques du béton par une large sonde coaxiale à terminaison ouverte

2006 ◽  
Vol 84 (5) ◽  
pp. 365-379 ◽  
Author(s):  
Bilal Filali ◽  
Jamal-Eddine Rhazi ◽  
Gérard Ballivy
Keyword(s):  
Statistical Analysis ◽  
Dielectric Properties ◽  
Water Content ◽  
Frequency Domain ◽  
Concrete Structures ◽  
Heterogeneous Materials ◽  
20 Nm ◽  
Nondestructive Measurements ◽  
Granite Samples ◽  
Coaxial Probe

We present nondestructive measurements of dielectric properties of concrete and mortar. The measures are made using a coaxial probe with a 32.5 mm open end, engineered specially for this work. The frequency domain goes from 100 to 900 MHz and includes frequently found frequencies in radars used for the auscultation of concrete structures. The probe was calibrated, and the measures were validated successfully on two solutions of different salinity, as well as on limestone and granite samples. Measures were also carried out on two mortars and six concretes of different recipes. We studied the effect of porosity and water content on the measures. The statistical analysis of the results indicates thatthe dispersion of measurements on these heterogeneous materials (granulometry from 5 to 20 nm) is comparable to that observed in limestone and granite. Our results confirm those from other authors who used more complicated techniques.[Traduit par la Rédaction]

EFFECT OF DIELECTRIC PROPERTY OF HYDROUS DISPERSOID ON ELECTRORHEOLOGY

1996 ◽  
Vol 10 (23n24) ◽  
pp. 2849-2855 ◽  
Author(s):  
Akiko KAWAI ◽  
Kunio UCHIDA ◽  
Kunio KAMIYA ◽  
Akihiro GOTOH ◽  
Satoshi YODA ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Property ◽  
Dielectric Loss ◽  
Water Content ◽  
Loss Factor ◽  
Free Water ◽  
Relaxation Frequency ◽  
Dielectric Loss Factor ◽  
Silicon Oil

The effect of the dielectric property was investigated of titania and microcrystalline cellulose particles dispersed in a silicon oil on Electrorheology(ER). A commom understanding of the mechanism of ER is the electrical interaction by the interfacial polarization of dispersed particles. Block et al. reported the relaxation frequency of ER fluids, i. e. the rate of polarization, was very important to have an appreciable ER effect. We found that the free water on the cellulose and the titania particles dispersed in the silicon oil, which is respectively dehydrated below the temperature of ca. 110 and 300 degree centigrade, was necessary for an appreciable ER effect. The relation was measured between the water content and the dielectric properties such as dielectric constant ε ’ and dielectric loss factor ε ", as the water adsorbed on the particles was estimated to alter the dielectric properties of the ER fluid. Both the dielectric constant and the relaxation frequency, which is defined by the applied frequency for a peak of the dielectric loss factor, increased with the increase of the water content The relation was discussed between the ER effect and the dielectric properties.

Dielectric properties of low-water-content tissues

1985 ◽  
Vol 30 (9) ◽  
pp. 965-973 ◽  
Author(s):  
S R Smith ◽  
K R Foster
Keyword(s):  
Dielectric Properties ◽  
Water Content
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