Critical Grain Size of Fine Aggregates in the View of the
size of the fine aggregates is bigger than 0.7 mm the yield stress is not affected by the size of the fine aggregate. Additionally if aggregate grains get smaller up to 0.3 mm their water absorption is critical to the rheological behavior. Keywords mortar rheology viscosity fine aggregate grain size Krieger–Dougherty equation. 1.
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Rheological Behavior of Fine and Large Particle
A new rheometric system the ball measuring system is used to determine the rheological behavior of fluids with large particles. To assess the applicability of the new system for debris flow material artificial fine particle suspensions are investigated with the ball measuring system and a
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Investigating Improved Rheological and Fluid Loss
rheological and fluid loss behavior of water-based drilling fluid prepared with sepiolite clay. The effects of grain size mixing time and mixing speed on elevated temperatures have been investigated. Substantial differences on rheological properties as a function of mixing time and mixing speed have been observed. No additives other than
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(PDF) Effects of Nanomaterials on the Hydration Kinetics
Rheological behavior of the paste was characterized using a rotational rheometer. The rheology measurements were performed at 10 30 60 90 and 120 min after the cement was mixed with water.
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The Role of Grain Size and Effective Normal Stress on
Mar 22 2021 · For earthquakes to occur on tectonic faults deformation localizes onto discrete slip surfaces within the gouge material of the fault core. Here we investigate how localization is promoted in quartz gouge a material known to exhibit unstable stick‐slip behavior by assessing the role of grain size and effective normal stress on microstructural evolution and frictional behavior.
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Effect of size reduction on colour hydration and
3.1 Hydration properties. Size reduction had significant effect on water-holding capacity (WHC) water-retention capacity (WRC) and swelling capacity (SC) of WB as shown below WHC WRC and SC ranged from 3.39-6.49 2.17-5.76 and 3.50-7.67 respectively. All hydration properties decreased significantly (p < 0.05) as the particle size of WB was
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THE INFLUENCE OF PARTICLES ON THE RHEOLOGICAL
particle contents however the rheological data reveal dramatically different behavior compared to pure-water ice. For a sample containing intergranular particles 1 Figure 1Rheological data for samples with an ice grain size of 10 µm containing an intragranular dispersion of 0.1
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Polyelectrolyte Effects on the Rheological Properties of
GA) and particle size analysis (Model CAPA-700 Horiba Ltd. Tokyo Japan) respectively. b-C2S and g-C2S have the same chemical composition but exhibit markedly different hydration behavior in the presence of water. b-C2S undergoes hydration reactions
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PHYSICO-CHEMICAL FUNCTIONAL AND RHEOLOGICAL
The mean values regarding grain size (Table 1) indicated that the grain length width and thickness of wheat variety AS-2002 are 6.11 3.09 and 2.74 mm while Inqalab-91 had 5.93 3.19 and 2.57 mm respectively. The wheat variety AS-2002 possessed higher grain length and thickness and lower grain width as compared to Inqalab-91.
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Laboratory Measurements of the Rheological Effects of Dust
Laboratory Measurements of the Rheological Effects of Dust Upon Water Ice Implications for Periglacial Processes on Mars W. B. Durham Principal Investigator PROPOSAL SUMMARY We propose a laboratory study of the effect of dust on grain-size-sensitive (GSS) creep in water ice and of the creep of ice-poor soils with application to surface features
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Effect of Particle Size of Bentonite on Rheological
Four samples of water-based mud were prepared of different grain sizes (38 63 75 and 106 μm) at a concentration of 4 and the rheological behavior was recorded this was repeated at different concentrations (5 6 and 7.5 ) and the particle size distribution was demonstrated for all grain sizes.
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Influence of PCE on Rheological and Hydration Performances
Mar 03 2020 · The hydration degree of the cement paste is hindered by the addition of PCE at 1 day but promoted at 3 days while the promotion of hydration process almost vanishes at 28 days. The addition of PCE decreases the size of hydration products in hardened cement paste and changes the composition of hydrated calcium silicate (C-S-H) gel.
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Controlling Rheological and Fluid Loss Properties of
filtration properties for various salinities. The grain size effect on the rheological properties at room temperature of sepiolite slurries were investigated by Carney et al. (1976) and revealed the considerable differences. It is well known fact that the effects of mixing speed the mixing time and the grain size on rheological and filtration
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Geochemistry Geophysics Geosystems
1750 C. We determine the effect of varying the rheological flow law from Newtonian diffusion creep only into a composite law combining both grain size sensitive Newtonian diffusion creep and power law (grain size independent) dislocation creep. Different grain sizes are used to test for varying strengths of the diffusion creep component
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Particle size distribution of rice flour affecting the
Hydration properties of flours and gels and starch enzymatic hydrolysis of individual fractions were assessed. Particle size heterogeneity on rice flour significantly affected functional properties and starch features at room temperature and also after gelatinization and the extent of that effect was grain
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Influence of grains distribution on the rheological
Jul 20 2018 · The influence of the granulometric composition of sand on rheological behavior of mortars is investigated. while the fine fraction (<100 μm) is affected by surface phenomena and hydration the results of the study conducted by Bonin et al. in which the authors evaluated the influence of five different grain size distributions of sands
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Effect of Particle Size of Bentonite on Rheological
May 07 2007 · Four samples of water-based mud were prepared of different grain sizes (38 63 75 and 106 μm) at a concentration of 4 and the rheological behavior was recorded this was repeated at different concentrations (5 6 and 7.5 ) and the particle size distribution was demonstrated for all grain
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1750 C. We determine the effect of varying the rheological flow law from Newtonian diffusion creep only into a composite law combining both grain size sensitive Newtonian diffusion creep and power law (grain size independent) dislocation creep. Different grain sizes are used to test for varying strengths of the diffusion creep component
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behavior of the lithosphere of the Earth particularly because theydo not providean appropriate memory for the rheology Bercovici and Karato 2003 . Grain size dependent rheologies is used in several studies of the localization of deformation in shear zones Kameyama et al. 1997 Braun et al. 1999 Montési and Hirth 2003 or mantle convection
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Relationship between dynamic recrystallization grain size
Relationship between dynamic recrystallization grain size distribution and rheology Abstract. The solid state flow behavior (rheology) of materials constituting the Earth s mantle and crust is of key importance in controlling the dynamics of large scale geodynamic processes such as mantle convection subduction mountain building and
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Effects of vibration amplitude and relative grain size on
Aug 12 2016 · Ultrasonic-assisted microextrusion tests were performed on pure copper (Cu) with different amplitudes and dimensions to investigate the effects of amplitude and relative grain size L/D (i.e. the ratio of initial grain size L to dimension after extrusion D) on its rheological behavior. The ratio of average extrusion height H to dimension after extrusion D was used as a microformability
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Rheological behavior and setting time of microfine cement
For the grain-size distribution of MFA d 50 d 95 and d max were 3.56 7.28 and 13.74 μm respectively. e maximum grain size of MFA was finer than that of MC and both MFA and MC had a
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The Hydration of Grains A Critical Review from
This behavior is characterized by a reduction in the hydration rate from a maximum value to zero when the grain absorbs the maximum water that it can hold (equilibrium moisture content). In other works the driving force of mass transfer is reduced until the equilibrium is reached. Figure 5
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Microstructural and Rheological Evolution of a Mantle
Because of its intrinsic rheological behavior and its effect on olivine grain size the recrystallization of orthopyroxene is an important mechanism for producing long-lived zones of weakness in the mantle lithosphere and may therefore play an important role in the accommodation of plate tectonics.
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THE INFLUENCE OF PARTICLES ON THE RHEOLOGICAL
particle contents however the rheological data reveal dramatically different behavior compared to pure-water ice. For a sample containing intergranular particles 1 Figure 1Rheological data for samples with an ice grain size of 10 µm containing an intragranular dispersion of 0.1
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The role of tectonic grain size reduction in the
The role of tectonic grain size reduction in the rheological stratification of the lithosphere. Authors We use the results of recent studies of grain-size dependent flow of olivine to estimate strain dependent variations in the flow strength of the sub-continental upper mantle arising from dynamic recrystallization. Experimental
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Effect of Phase Distribution on Rheological Behavior of
Nov 01 2014 · Three kinds of calcium aluminate cements (CaAl 2 O 4 CA) with builtin aluminamagnesia spinel (MA) were prepared.The mineral composition and microstructure characteristics were investigated by techniques of Xray diffraction and scanning electron microscopy.Their setting time and rheological behavior were also analyzed.The resultsi ndicated that when MA phases distributed among CA
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Effect of poly‐γ‐glutamic acid on hydration and structure
Aug 28 2020 · However studies on the effect of hydrophilic polymers on wheat gluten (WG) within the dough are scarce. In the present study poly‐γ‐glutamic acid (γ‐PGA) a new and healthy food additive was added to the WG to investigate its effect on hydration rheological properties and structures of
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PHYSICO-CHEMICAL FUNCTIONAL AND RHEOLOGICAL
The mean values regarding grain size (Table 1) indicated that the grain length width and thickness of wheat variety AS-2002 are 6.11 3.09 and 2.74 mm while Inqalab-91 had 5.93 3.19 and 2.57 mm respectively. The wheat variety AS-2002 possessed higher grain length and thickness and lower grain width as compared to Inqalab-91.
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Effect of poly‐γ‐glutamic acid on hydration and structure
Aug 28 2020 · However studies on the effect of hydrophilic polymers on wheat gluten (WG) within the dough are scarce. In the present study poly‐γ‐glutamic acid (γ‐PGA) a new and healthy food additive was added to the WG to investigate its effect on hydration rheological properties and structures of
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