scholarly journals Porous Multiphase Microcharacteristics Research of New Cement-Based Grouting Material Concretion

2021 ◽  
Vol 2021 ◽  
pp. 1-17
Author(s):  
Wei Xie ◽  
Junwu Xia ◽  
Linli Yu ◽  
Hongfei Chang
Keyword(s):  
Solid Phase ◽  
Characteristic Parameter ◽  
Hydration Reaction ◽  
Pore Characteristics ◽  
Volume Proportion ◽  
Grouting Material ◽  
Gel Phase ◽  
Microscopic Morphology ◽  
Shape Characteristics ◽  
Solid Phase Composition

As an excellent inorganic hydraulic cementitious material, new cement-based grouting material (abbreviated as NCG) has a wide application prospect in grouting engineering. Four types of water-cement ratio (W/C ratio) NCG concretions were systematically researched on the solid-phase composition, microscopic morphology, nanoscale pore characteristics and micron-scale multiphase microscopic characteristics through SEM, TGA-DSC, BET, MIP, and 3D-XRM in combination with hydration reaction mechanism. The NCG concretion is characterized as a spatial network structure formed by dendritic or columnar ettringite (AFt) crystals, filled with calcium silicate hydrate gel (C–S–H) and aluminum gel (AH3). In the solid phase, the mass of AFt is the highest, about 65%, the mass of C–S–H is about 20%, and the mass of AH3 is the least, about 15%. In nanoscale, the pore size of NCG concretion is concentrated in about 50 nm–3 μm, and the volume proportion reaches about 90%, which can be used as the characteristic parameter of pore-phase. With the increase of W/C ratio and age, the MPD of pore decreases, and the probability of the MPD-pore increases, and the dispersion of the probability of pores increases. In nanoscale, the porosity of NCG concretion is as high as 60%. With the increase of W/C ratio and age, the porosity of NCG concretion increases, but the effect on the density of solid-phase is little. In micron scale, the regular characteristics related to diameter of pore-phase and gel-phase are similar, showing a three stage formula: as their diameter increases, the number of monocases decreases and its rate of reduction gradually slows down, the volume-proportion decreases first and then increases, the differentiation of volume between the monocases increases gradually, and the differentiation between monocases shape and sphere is bigger, and its shape characteristics are more diverse and discrete.

Laboratory Determination of the Solid Phase Composition of Technogenically Salinized Peatlands: Possibilities and Limitations

2020 ◽  
Vol 75 (3) ◽  
pp. 131-137
Author(s):  
Yu. N. Vodyanitskii ◽  
N. A. Avetov ◽  
A. T. Savichev ◽  
S. Ya. Trofimov ◽  
E. A. Shishkonakova
Keyword(s):  
Phase Composition ◽  
Solid Phase ◽  
Laboratory Determination ◽  
Solid Phase Composition

ChemInform Abstract: Gel-Phase 31P NMR. A New Analytical Tool to Evaluate Solid Phase Oligonucleotide Synthesis.

ChemInform ◽  
2010 ◽  
Vol 25 (27) ◽  
pp. no-no
Author(s):  
F. BARDELLA ◽  
R. ERITJA ◽  
E. PEDROSO ◽  
E. GIRALT
Keyword(s):  
31P Nmr ◽  
Solid Phase ◽  
Analytical Tool ◽  
Oligonucleotide Synthesis ◽  
Gel Phase

Determination of liquid and solid phase composition in partially frozen middle distillate fuels

Fuel ◽  
1987 ◽  
Vol 66 (7) ◽  
pp. 890-896 ◽  
Author(s):  
Thomas L. Van Winkle ◽  
Wilbur A. Affens ◽  
Erna J. Beal ◽  
George W. Mushrush ◽  
Robert N. Hazlett ◽  
...  
Keyword(s):  
Phase Composition ◽  
Solid Phase ◽  
Middle Distillate ◽  
Solid Phase Composition ◽  
Middle Distillate Fuels

Fluorinated linkers for monitoring solid-phase synthesis using gel-phase 19F NMR spectroscopy

1998 ◽  
Vol 39 (39) ◽  
pp. 7193-7196 ◽  
Author(s):  
Anette Svensson ◽  
Karl-Erik Bergquist ◽  
Tomas Fex ◽  
Jan Kihlberg
Keyword(s):  
Nmr Spectroscopy ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
19F Nmr ◽  
Phase Synthesis ◽  
19F Nmr Spectroscopy ◽  
Gel Phase

scholarly journals Effect of Nanosilica on the Fresh Properties of Cement-Based Grouting Material in the Portland-Sulphoaluminate Composite System

2016 ◽  
Vol 2016 ◽  
pp. 1-10 ◽  
Author(s):  
Shengli Li ◽  
Tingting Xu
Keyword(s):  
Particle Size ◽  
Apparent Density ◽  
Composite System ◽  
Setting Time ◽  
Xrd Analysis ◽  
Hydration Reaction ◽  
Particle Sizes ◽  
Fresh Properties ◽  
Air Content ◽  
Grouting Material

The effect of NS particle size and content on the fresh properties of the grouting material based on the portland-sulphoaluminate composite system was analyzed. The experimental results indicated that air content increased and apparent density decreased, with increased NS content, but the NS particle sizes have minimal effect on the air content and apparent density. The setting time of mortar was significantly shortened, with increased NS content; however, NS particle sizes had little influence on the setting time. The effect of fluidity on the mortars adding NS with particle size of 30 nm is larger than NS with particle sizes of 15 and 50 nm and the fluidity decreased with increased NS content, but the fluidity of mortars with the particle sizes of 15 and 50 nm is almost not affected by the NS content. XRD analysis shows that the formation of ettringite was promoted and the process of hydration reaction of cement was accelerated with the addition of NS. At the microscopic level, the interfacial transition zone (ITZ) of the grouting material became denser and the formation of C-S-H gel was promoted after adding NS.

scholarly journals Active wall through a porous media foam type: flow and transfer characterization

2020 ◽  
Vol 330 ◽  
pp. 01052
Author(s):  
Rafael Deptulski ◽  
Gisele Vieira ◽  
Rachid Bennacer
Keyword(s):  
Thermal Conductivity ◽  
Porous Media ◽  
Solid Phase ◽  
Cross Flow ◽  
Structured Media ◽  
Medium Porosity ◽  
Flow Through ◽  
Thermodynamic Coupling ◽  
Volume Method ◽  
Solid Phase Composition

Despite the efforts to develop new solutions to achieve the objectives of positive buildings in energy, a few studies in this area has been performed using a porous media foam type. The aim of this paper is to present the behaviour transfers of flow through a multi-structured porous media and to achieve the influence of the porosity and the thermal conductivity properties of the skeletal phase, and the interaction with a cross flow in order to get the equivalent of a perfect insulator. Therefore, in a specially made device, a finite volume method was applied to study a flow through a porous media foam-type, which was simulated to characterize the properties of the equivalent medium in terms of permeability and thermal conductivity. The analysis demonstrates that the solid phase composition and the medium porosity, as well as the distribution of pore size, are preponderant characteristics to constitute a foam structured media. Furthermore, the thermal boundary layer given by a forced convection through the porous medium has demonstrated the important influence of the flow phenomenon in a thermodynamic coupling. Lastly, three optimum configurations for the construction envisaging a balance of depleted thermal and dynamic powers for a relative conductivity *=10 were found between the velocity 2 10-3 (m/s) and 4 10-3 (m/s).

Multi-Fractal Spectrum and their Applications in Metal Fracture Surface Images Feature Extraction

2014 ◽  
Vol 536-537 ◽  
pp. 241-244
Author(s):  
Jing Chen ◽  
Lin Mao
Keyword(s):  
Fracture Surface ◽  
Characteristic Parameter ◽  
Fracture Surfaces ◽  
Shape Characteristic ◽  
Similar Shape ◽  
Surface Recognition ◽  
Metal Fracture ◽  
Surface Image ◽  
Fractal Spectrum ◽  
Shape Characteristics

Based on Bandelet transform and Multi-fractal, the metal fracture surface image denoising is described in the paper. Using multi-fractal analysis, eight multi-fractal spectrum values which are used as shape characteristic parameter of metal fracture surface are extracted. Experimental results showed that different metal fracture surfaces have different shape characteristics and the same kind of metal fracture surfaces have similar shape characteristics. So the shape characteristic parameter of metal fracture surface can be used to study the fracture surface recognition and as the sample of failure analysis.

Investigation of Solid Phase Composition on Tablet Surfaces by Grazing Incidence X-ray Diffraction

2011 ◽  
Vol 29 (1) ◽  
pp. 134-144 ◽  
Author(s):  
Vishal Koradia ◽  
Mikko Tenho ◽  
Heidi Lopez de Diego ◽  
Michiel Ringkjøbing-Elema ◽  
Jørn Møller-Sonnergaard ◽  
...  
Keyword(s):  
Phase Composition ◽  
Solid Phase ◽  
Grazing Incidence ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid Phase Composition

Application of Gel-Phase 195Pt NMR Spectroscopy in a Novel Solid-Phase Synthesis of a Primary Amine Dichloroplatinum(II) Complex

2003 ◽  
Vol 2003 (8) ◽  
pp. 1529-2532 ◽  
Author(s):  
Marc S. Robillard ◽  
Jason S. Leith ◽  
Gijs A. van der Marel ◽  
Jacques H. van Boom ◽  
Jan Reedijk
Keyword(s):  
Nmr Spectroscopy ◽  
Primary Amine ◽  
Solid Phase Synthesis ◽  
Solid Phase ◽  
Phase Synthesis ◽  
Gel Phase
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