scholarly journals Characterization of Steel Slag Filler and Its Effect on Aging Resistance of Asphalt Mastic with Various Aging Methods

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 869
Author(s):  
Minghua Wei ◽  
Shaopeng Wu ◽  
Haiqin Xu ◽  
Hechuan Li ◽  
Chao Yang
Keyword(s):  
Particle Size ◽  
Surface Characterization ◽  
Steel Slag ◽  
Self Healing ◽  
Limestone Filler ◽  
Asphalt Mastic ◽  
Pore Characterization ◽  
Asphalt Mastics ◽  
Healing Property

Steel slag is the by-product of the steelmaking industry, the negative influences of which prompt more investigation into the recycling methods of steel slag. The purpose of this study is to characterize steel slag filler and study its feasibility of replacing limestone filler in asphalt concrete by evaluating the resistance of asphalt mastic under various aging methods. Firstly, steel slag filler, limestone filler, virgin asphalt, steel slag filler asphalt mastic and limestone filler asphalt mastic were prepared. Subsequently, particle size distribution, surface characterization and pore characterization of the fillers were evaluated. Finally, rheological property, self-healing property and chemical functional groups of the asphalt mastics with various aging methods were tested via dynamic shear rheometer and Fourier transform infrared spectrometer. The results show that there are similar particle size distributions, however, different surface characterization and pore characterization in the fillers. The analysis to asphalt mastics demonstrates how the addition of steel slag filler contributes to the resistance of asphalt mastic under the environment of acid and alkaline but is harmful under UV radiation especially. In addition, the pore structure in steel slag filler should be a potential explanation for the changing resistance of the asphalt mastics. In conclusion, steel slag filler is suggested to replace limestone filler under the environment of acid and alkaline, and environmental factor should be taken into consideration when steel slag filler is applied to replace natural fillers in asphalt mastic.

Self-healing property characterization of reversible thermoset coatings

2011 ◽  
Vol 105 (3) ◽  
pp. 805-809 ◽  
Author(s):  
G. Scheltjens ◽  
J. Brancart ◽  
I. De Graeve ◽  
B. Van Mele ◽  
H. Terryn ◽  
...  
Keyword(s):  
Self Healing ◽  
Healing Property ◽  
Property Characterization

Synthesis and characterization of geopolymers containing blends of unprocessed steel slag and metakaolin: The role of slag particle size

2018 ◽  
Vol 44 (5) ◽  
pp. 5226-5232 ◽  
Author(s):  
E. Furlani ◽  
S. Maschio ◽  
M. Magnan ◽  
E. Aneggi ◽  
F. Andreatta ◽  
...  
Keyword(s):  
Particle Size ◽  
Steel Slag ◽  
Synthesis And Characterization ◽  
Slag Particle

scholarly journals Advanced Methods for the Characterization of Supramolecular Hydrogels

Gels ◽  
2021 ◽  
Vol 7 (4) ◽  
pp. 158
Author(s):  
Bridget R. Denzer ◽  
Rachel J. Kulchar ◽  
Richard B. Huang ◽  
Jennifer Patterson
Keyword(s):  
Surface Characterization ◽  
State Of The Art ◽  
Self Healing ◽  
Rheological Characterization ◽  
Future Directions ◽  
Characterization Methods ◽  
Force Microscopy ◽  
Atomic Force ◽  
Promising Type

With the increased research on supramolecular hydrogels, many spectroscopic, diffraction, microscopic, and rheological techniques have been employed to better understand and characterize the material properties of these hydrogels. Specifically, spectroscopic methods are used to characterize the structure of supramolecular hydrogels on the atomic and molecular scales. Diffraction techniques rely on measurements of crystallinity and help in analyzing the structure of supramolecular hydrogels, whereas microscopy allows researchers to inspect these hydrogels at high resolution and acquire a deeper understanding of the morphology and structure of the materials. Furthermore, mechanical characterization is also important for the application of supramolecular hydrogels in different fields. This can be achieved through atomic force microscopy measurements where a probe interacts with the surface of the material. Additionally, rheological characterization can investigate the stiffness as well as the shear-thinning and self-healing properties of the hydrogels. Further, mechanical and surface characterization can be performed by micro-rheology, dynamic light scattering, and tribology methods, among others. In this review, we highlight state-of-the-art techniques for these different characterization methods, focusing on examples where they have been applied to supramolecular hydrogels, and we also provide future directions for research on the various strategies used to analyze this promising type of material.

scholarly journals Mechanical Behavior of Asphalt Mastics Produced Using Waste Stone Sawdust

2018 ◽  
Vol 2018 ◽  
pp. 1-10 ◽  
Author(s):  
Ghazi G. Al-Khateeb ◽  
Taisir S. Khedaywi ◽  
Motaz F. Irfaeya
Keyword(s):  
Asphalt Binder ◽  
Volume Ratio ◽  
Elastic Behavior ◽  
Coefficient Of Determination ◽  
Loading Frequency ◽  
Modulus Ratio ◽  
Limestone Filler ◽  
Asphalt Mastic ◽  
Wide Range ◽  
Asphalt Mastics

This study intended to evaluate the use of waste stone sawdust filler with asphalt binders and compare the mechanical properties of the waste filler-asphalt mastic with those of the asphalt mastic produced using the typical limestone filler. The mastics were prepared at four filler-to-asphalt ratios by volume of asphalt binder: 0.05, 0.10, 0.20, and 0.30. A dynamic shear rheometer (DSR) strain-controlled frequency sweep test was used to evaluate the properties of the control asphalt binder and the mastics. The test used a constant strain of 10% and loading frequencies of 10, 5.6, 3.1, 1.78, 1.0, 0.56, 0.31, 0.178, and 0.1 Hz and was conducted at wide range of temperatures: 10, 20, 30, 40, 50, 60, and 70°C. The test measured the complex shear modulus (G∗) value and the phase angle for the binder and the mastics. The findings of this study showed that the stone sawdust filler demonstrated higher resistance to fatigue and rutting behavior than the limestone filler. However, the elastic behavior of the two asphalt mastics was nearly similar and increased with the increase in volume ratio. It was also found that the best-fit model described the relationship between the volume ratio and each of G∗/sin  δ and G∗cos δ, and the mastic-to-binder modulus ratio was the exponential model with high coefficient of determination (r2). The differences in the G∗ value between the limestone filler and the stone sawdust filler were relatively insignificant particularly at low loading frequencies and high temperatures. Finally, the mastic-to-binder modulus ratio decreased with the increase in loading frequency.

scholarly journals Self-Healing Property of Ultra-Thin Wearing Courses by Induction Heating

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1392 ◽  
Author(s):  
Jiuming Wan ◽  
Yue Xiao ◽  
Wei Song ◽  
Cheng Chen ◽  
Pan Pan ◽  
...  
Keyword(s):  
Induction Heating ◽  
Preventive Maintenance ◽  
Steel Fiber ◽  
Steel Slag ◽  
Heating Time ◽  
Asphalt Mixtures ◽  
Self Healing ◽  
Negative Effect ◽  
Healing Property ◽  
Marshall Stability

Ultra-thin wearing course (UTWC) has been developed in pavement preventive maintenance for many years. However, how to prolong the service life of UTWC still requires further research. This study introduced AC-5 and SMA-5 asphalt mixtures, which can be induction heated. Steel fiber and steel slag were used in the mixtures as additives. Marshall Stability and induction heating property of mixtures were characterized. In addition, self-healing property of UTWC materials had been emphatically conducted. Adding steel fiber in mixtures led to higher Marshall Stability and lower flow value, while steel slag generally showed a negative effect. Induction heating property showed a positive relationship with the additives. Induction heating time was positively correlated to the healing ratio of the mixtures. Induction heating on the mixtures could recover the strength of mixtures to a certain degree. Mixtures with more steel fiber showed a higher healing ratio. Basalt-steel slag based mixtures showed better healing ratios than the basalt based mixtures. The healing ratios of mixtures illustrated a decreasing tendency as the healing cycle increased.

Preparation and Characterization of Steel Slag Adsorbent

2011 ◽  
Vol 48-49 ◽  
pp. 844-847
Author(s):  
Sheng Yu Liu ◽  
Yuan Yuan Xu ◽  
Jin Gao ◽  
Cheng Wei Lu ◽  
Yi Jin Yang
Keyword(s):  
Surface Characterization ◽  
Ph Value ◽  
Steel Slag ◽  
X Ray Diffraction ◽  
Steel Making ◽  
Adsorption Capacities ◽  
Adsorption Processes ◽  
Solid Liquid ◽  
Solid Liquid Separation

Steel slag is a industry solid waste which come from steel making factory，and is easy to solid-liquid separation, so it posses some adsorption capacities and can be used as adsorbent. Adsorption phenol onto steel slag was investigated by the oscillating adsorption experiments and the effect of different operating parameters on these adsorption processes, such as initial concentration phenol and the pH value were studied. The surface characterization were gained by SEM, X-ray diffraction, IR Spectroscopy and BET.

BEHAVIOR OF ASPHALT MASTICS CONTAINING DIFFERENT MATERIALS AS FILLER

2020 ◽  
Author(s):  
JUAN GABRIEL BASTIDAS MARTINEZ ◽  
Hugo Alexander Rondón-Quintana ◽  
Márcio Muniz de Farias
Keyword(s):  
Blast Furnace Slag ◽  
Steel Slag ◽  
Asphalt Mixture ◽  
Hydrated Lime ◽  
Experimental Program ◽  
Recovery Test ◽  
Asphalt Mastic ◽  
Creep And Recovery ◽  
Asphalt Mastics ◽  
Furnace Slag

The behavior of the asphalt mixture is mainly attributed to the performance of the asphalt mastic. Several studies have been performed in order to evaluate the behavior of mastics made with different fillers. Most researchers have added the filler by mass within the bitumen; however, this comparison may be more appropriate by volume. An experimental program was designed in order to evaluate the behavior of mastics produced with five different fillers (natural limestone – LS, hydrated lime – HL, Portland cement – PC, Linz-Donawitz steel slag – LDSS and blast furnace slag – BFS), and were dosed by mass and volume. Penetration, softening point, viscosity, Multiple Stress Creep and Recovery Test and Linear Amplitude Sweep Test were performed. Results showed that analyzed asphalt mastic properties depend on dosage type performed and test type. Furthermore, HL, PC, BFS and LDSS mastics showed better performance compared to control LS mastic.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

Incorporation of micro/nanoparticles of PCL with essential oil of Cymbopogon nardus in bacterial cellulose

2018 ◽  
Vol 1 (2) ◽  
pp. 37
Author(s):  
Aline Krindges ◽  
Vanusca Dalosto Jahno ◽  
Fernando Morisso
Keyword(s):  
Particle Size ◽  
Particulate Matter ◽  
Essential Oil ◽  
Zeta Potential ◽  
Bacterial Cellulose ◽  
Culture Medium ◽  
Static Culture ◽  
Cymbopogon Nardus ◽  
Cellulose Membranes

Incorporation studies of particles in different substrates with herbal assets growing. The objective of this work was the preparation and characterization of micro/nanoparticles containing cymbopogon nardus essential oil; and the incorporation of them on bacterial cellulose. For the development of the membranes was used the static culture medium and for the preparation of micro/nanoparticles was used the nanoprecipitation methodology. The incorporation of micro/nanoparticles was performed on samples of bacterial cellulose in wet and dry form. For the characterization of micro/nanoparticles were carried out analysis of SEM, zeta potential and particle size. For the verification of the incorporation of particulate matter in cellulose, analyses were conducted of SEM and FTIR. The results showed that it is possible the production and incorporation of micro/nanoparticles containing essential oil in bacterial cellulose membranes in wet form with ethanol.

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