Study on Performance of Graduation Rubber Modified Asphalt

2011 ◽  
Vol 374-377 ◽  
pp. 1925-1929
Author(s):  
Yan Chun Li ◽  
Rui Lv ◽  
Pan Zhang ◽  
Yu Zhuo Xu ◽  
Guo Jing Hou
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Class Size ◽  
Asphalt Mixture ◽  
Influence Factors ◽  
Powder Preparation ◽  
Mixed Powder ◽  
Modified Asphalt ◽  
The Stability ◽  
Performance Research

Consider the rubber modified asphalt preparation powder in the process of particle size, the influence factors of 40 yard, and are chosen 60 orders and class size distribution of particle size of mixed powder preparation powder, and puts forward the rubber modified asphalt mixture of different size when range, three kinds of modified asphalt compared the basic indexes and storage stability and permeable performance. Research shows that, the stability of class size distribution of the rubber modified asphalt is better than that of single particle size of the rubber modified asphalt.

Influence of load on particle size distribution of lactose–crystalline cellulose mixed powder

2008 ◽  
Vol 354 (1-2) ◽  
pp. 255-259
Author(s):  
Takahiko Nakamori ◽  
Atsuo Miyagishim ◽  
Yasuo Nozawa ◽  
Yasuyuki Sadzuka ◽  
Takashi Sonobe
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Crystalline Cellulose ◽  
Mixed Powder

scholarly journals Micro-morphologies of SBS modifier at mortar transition zone in asphalt mixture with thin sections and fluorescence analysis

2021 ◽  
Vol 2 (1) ◽  
Author(s):  
Yue Xiao ◽  
Mujaheed Yunusa ◽  
Boxiang Yan ◽  
Xiaoshan Zhang ◽  
Xiwen Chang
Keyword(s):  
Particle Size ◽  
Transition Zone ◽  
Coefficient Of Variation ◽  
Asphalt Mixture ◽  
Area Ratio ◽  
Box Dimension ◽  
Fine Aggregate ◽  
Axis Ratio ◽  
Thin Sections ◽  
Modified Asphalt

AbstractThe microstructure control of modified asphalt, especially the micro-dispersion of the SBS modifier in the mortar transition zone, is a critical technology for the performance design of modified asphalt. To characterize the micro-dispersive morphology of SBS modifiers, thin-section preparation techniques that can be used to analyze the original microstructure of the asphalt mixture were proposed and introduced in this study. Flexible resin is filled into the mixture at vacuum conditions to ensure accepted sample conditions for preparing thin sections of asphalt mixture. The morphology parameters, including SBS area ratio, box dimension, SBS average particle area and its coefficient of variation, area-weighted average axis ratio, and coefficient of variation, were plotted from fluorescence images to characterize the micro-morphological distribution of the SBS modifier in detail. Results have shown that the area ratio increased with the increase in SBS content, while the box dimension was reduced and the distribution uniformity of the particles decreased. The superfluous SBS modifier in the binder at a too high adding ratio will decrease the value of the box dimension. Lower modification temperature worsened the SBS modifier in the mixture, resulting in a wide range of particle size, higher axis ratio, and higher area ratio. The micro-morphologies of SBS in the asphalt mixture phase varied a lot from the asphalt binder phase. The additional materials of mineral filler and fine aggregate, together with the other heating processes, will significantly influence the swelling state and particle size of the SBS modifier.

Effects of Acidity on the Stabilities of Cloudy Apple Juice

2018 ◽  
Vol 789 ◽  
pp. 26-30
Author(s):  
Dan Shi Zhu ◽  
Li Wei Wei ◽  
Xiao Jun Ren ◽  
Xue Hui Cao ◽  
He Liu ◽  
...  
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Shelf Life ◽  
Size Distribution ◽  
Apple Juice ◽  
Influence Factor ◽  
Control Group ◽  
Particle Sizes ◽  
Stability Indexes ◽  
The Stability

Acidity is an important influence factor for juice stability. In this study, the effects of acidityon stability of cloudy apple juice were investigated. The stability indexes, such as, turbidity, cloudvalue, cloud stability, and particle size distribution (PSD) were measured at pH 2.0, 2.5, 3.0 and 3.5,along with the untreated juice (pH 3.8) as control group. The results showed that, pH has significanteffects on turbidity, chrome (C*), cloud value, and D50, D90 in PSD of cloudy apple juice. The juicehad a better stabilization at pH 2.5. At this pH condition, the turbidity, cloud value, cloud stability ofjuice was the best. In addition, at pH 2.5, the color of the juice was better, the particles were smaller,and the particle sizes were more uniform. By this study, a theoretical reference could be provided forimproving stability of cloudy apple juice and extending juice shelf life.

The Influence of Groundwater on the Stability of Silica Colloids

2009 ◽  
Vol 1193 ◽  
Author(s):  
Pirkko Holtta ◽  
Mari Lahtinen ◽  
Martti Hakanen ◽  
Jukka Lehto ◽  
Piia Juhola
Keyword(s):  
Particle Size ◽  
Zeta Potential ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Colloidal Silica ◽  
Silica Sol ◽  
Low Salinity ◽  
Silica Concentration ◽  
Silica Colloids ◽  
The Stability

AbstractNon-cementitious grouts have been tested in Olkiluoto for the sealing of fractures with the small hydraulic apertures. A promising non-cementitious inorganic grout material for sealing the fractures with the apertures less than 0.05 mm is commercial colloidal silica called silica sol. The potential relevance of colloid-mediated radionuclide transport is highly dependent on their stability in different geochemical environments. The objective of this work was to follow stability of silica sol colloids in low salinity Allard and saline OLSO reference groundwater (pH 7–11) and in deionized milliQ water. Stability of silica sol colloids was followed by measuring particle size distribution, zeta potential, colloidal and reactive silica concentrations. The particle size distributions were determined applying the dynamic light scattering (DLS) method and zeta potential based on dynamic electrophoretic mobility. The colloidal silica concentration was calculated from DLS measurements applying a calibration using a standard series of silica sol. Dissolved reactive silica concentration was determined using the molybdate blue (MoO4) method.These results confirmed that the stability of silica colloids dependent significantly on groundwater salinity. In deionized water, particle size distribution and zeta potential was rather stable except the most diluted solution. In low salinity Allard, particle size distribution was rather constant and the mean particle diameter remained less than 100 nm. High negative zeta potential values indicated the existence of stable silica colloids. In saline OLSO, particle size distribution was wide from a nanometer scale to thousands of nanometers. The disappearance of large particles, decrease in colloidal particle concentration and zeta potential near zero suggest flocculation or coagulation. Under prevailing saline groundwater conditions in Olkiluoto silica colloids released from silica sol are expected to be instable but the possible influence of low salinity glacial melt water has to be considered.

Pavement Performance Research on Fine Volcanic Ash Modified Asphalt Mastic and Mixture

2011 ◽  
Vol 255-260 ◽  
pp. 3382-3386 ◽  
Author(s):  
Zhi Guo Chen ◽  
Zi Ning Chen ◽  
Jian Tao Wu ◽  
Hai Chen Yao
Keyword(s):  
Volcanic Ash ◽  
Asphalt Mixture ◽  
Cost Effective ◽  
Economic Benefits ◽  
Test Methods ◽  
Pavement Performance ◽  
Modified Asphalt ◽  
Asphalt Mastics ◽  
Particle Sizer ◽  
Performance Research

In this paper, based on advanced test methods such as laser particle sizer, scanning electron microscope, DSR and BBR,studies on physical properties of fine volcanic ash are carried out and the effect of single and composite modification on asphalt mastics and concrete by fine volcanic ash are also studied. Cost-effective of asphalt concrete modified by fine volcanic ash are analyzed as well. Results indicated fine volcanic ash can be qualified as a filler modifier for asphalt mixture and it significantly improves asphalt pavement performance and reduces project cost. Fine volcanic ash has favorable social and economic benefits and a broad application prospect.

scholarly journals Concentration and Dilution of Ultrafine Bubbles in Water

2020 ◽  
Vol 4 (4) ◽  
pp. 50
Author(s):  
Shunya Tanaka ◽  
Yuri Naruse ◽  
Koichi Terasaka ◽  
Satoko Fujioka
Keyword(s):  
Particle Size ◽  
Size Distribution ◽  
Particle Tracking ◽  
Practical Problem ◽  
Colloidal Dispersions ◽  
Number Concentration ◽  
Ultrapure Water ◽  
Rotary Evaporation ◽  
Dispersion Media ◽  
The Stability

Submicron-sized bubbles are now officially called ultrafine bubbles (UFBs) by the international standard. The concentration of UFBs is generally low (<109 particles/mL; <0.001 vol%) compared to other colloidal dispersions. To overcome this practical problem, we concentrated UFBs in ultrapure water prepared by a commercial UFB generator and quantified the effect of rotary evaporation of the dispersion media on the stability of UFBs. The UFB dispersions were characterized by a particle tracking analysis (PTA) instrument. The experimental results showed that the UFBs can be diluted and concentrated without changing the size distribution and there was little or no loss of UFBs. By using a rotary evaporator, UFB dispersions were about 30-fold concentrated and the resultant number concentration reached over 3 × 1010 particles/mL. Increasing the concentration of UFBs allowed for satisfactory dynamic light scattering (DLS) measurements. The differences among the three algorithms for analyzing the raw data, i.e., autocorrelation function, obtained by DLS are discussed, along with the characteristics of the particle size distribution derived from each algorithm.

Influence Factors on the Size of Spherical Silver Powder Used for Solar Cell Top Electrode Paste

2013 ◽  
Vol 743-744 ◽  
pp. 903-909
Author(s):  
Si Zhang ◽  
Yue Lin Zhu ◽  
Jia Song
Keyword(s):  
Particle Size ◽  
Ascorbic Acid ◽  
Particle Size Distribution ◽  
Acid Solution ◽  
Size Distribution ◽  
Silver Powder ◽  
Influence Factors ◽  
Solution Concentration ◽  
Face Centered Cubic ◽  
Ascorbic Acid Solution

The ultra-fine silver powders were prepared by chemical reduction using nitric acid silver (AgNO3) as raw material, ascorbic acid (C6H8O6) as deoxidizer and adding polyvinylpyrrolidone (PVP) as dispersing agent. The influence factors, such as AgNO3solution concentration, ascorbic acid solution concentration, PVP dosage and reaction conditions such as temperature, PH etc. were studied. The morphology and particle size distribution were observed by Field Emission Scanning Electron Microscopy (FSEM) and laser particle analyzer. The composition was analyzed by Energy Dispersive Spectrometer (EDS).The crystal phase was tested by X-ray Diffraction (XRD). It indicates that the spherical ultra-fine silver powder is face-centered cubic structure, its diameter is about 1.0 μm with homogeneous particle size distribution and smooth surface. It was prepared under the conditions as following: dropwise added 60 g/L AgNO3solution into 40g/L ascorbic acid solution, with the presence of PVP, and pH=3,45,360rpm. It meets the requirements of paste for solar cells top electrode.

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