Enzymatic Hydrolysis Lignin Epoxy Resin Modified Asphalt

2011 ◽  
Vol 239-242 ◽  
pp. 3346-3349 ◽  
Author(s):  
Yao Xie ◽  
Qiu Feng Lü ◽  
Yan Qiao Jin ◽  
Xian Su Cheng
Keyword(s):  
Enzymatic Hydrolysis ◽  
Epoxy Resin ◽  
Chemical Reactivity ◽  
High Mass ◽  
Hydrolysis Lignin ◽  
Petroleum Asphalt ◽  
Modified Asphalt ◽  
Paving Asphalt ◽  
High Mass Loss ◽  
Aging Property

This paper studies the modification of petroleum asphalt with enzymatic hydrolysis lignin (EHL) epoxy resin. EHL epoxy resin was successfully synthesized by EHL, a novel eco-material with high chemical reactivity. Different amounts of EHL epoxy resin were compounded into AH-70 paving asphalt. The effect of EHL epoxy resin on modified asphalt was examined by penetration, soften point, thin film oven test (TFOT), ductilily tests. The results showed that EHL epoxy resin had marked effect on the high-temperatrue property of increasing softening point at the content of 2-9wt% and it had significantly effect on the low-temperature properties and aging resistance with EHL epoxy resin content of 2-9wt% in modified asphalts. TG analysis indicated that EHL epoxy resin had the high mass loss temperature than pure asphalt. Anti-aging property of asphalt was improved by compounding EHL epoxy resin with asphalt.

Research on Enzymatic Hydrolysis Lignin Modified Petroleum Asphalt

2011 ◽  
Vol 306-307 ◽  
pp. 1080-1083 ◽  
Author(s):  
Zhi Dong Zhao ◽  
Yao Xie ◽  
Xian Su Cheng ◽  
Yan Qiao Jin ◽  
Ming Yang Xu
Keyword(s):  
Enzymatic Hydrolysis ◽  
Low Temperature ◽  
Physical Properties ◽  
Softening Point ◽  
Hydrolysis Lignin ◽  
Petroleum Asphalt ◽  
Modified Asphalt ◽  
Penetration Index ◽  
Temperature Performance ◽  
Brittle Point

In this paper, a series of enzymatic hydrolysis lignin modified petroleum asphalts were prepared. The physical properties such as softening point, ductility at low temperature and penetration of the modified asphalt were investigated. The penetration index of asphalt modified with EHL was higher than that of unmodified asphalt, equivalent softening point increased and equivalent brittle point decreased with the increase of EHL amount, which showed that the addition of EHL was favorable to reduce the temperature susceptivity of asphalt. When the EHL was 4%, the ductility was 39.0 cm. Meanwhile, low temperature performance of asphalt could be further improved by adding EHL and a small amount of SBS.

Study on the demethylation of enzymatic hydrolysis lignin and the properties of lignin–epoxy resin blends

2018 ◽  
Vol 52 (5) ◽  
pp. 1343-1357 ◽  
Author(s):  
Fang Wang ◽  
Juntao Kuai ◽  
Hengshi Pan ◽  
Nana Wang ◽  
Xinbao Zhu
Keyword(s):  
Enzymatic Hydrolysis ◽  
Epoxy Resin ◽  
Hydrolysis Lignin

scholarly journals The globular cluster system of the Auriga simulations

2020 ◽  
Vol 496 (1) ◽  
pp. 638-648 ◽  
Author(s):  
Timo L R Halbesma ◽  
Robert J J Grand ◽  
Facundo A Gómez ◽  
Federico Marinacci ◽  
Rüdiger Pakmor ◽  
...  
Keyword(s):  
Globular Cluster ◽  
Milky Way ◽  
Cluster Formation ◽  
Solar Radius ◽  
High Mass ◽  
Formation Model ◽  
The Galaxy ◽  
High Mass Loss ◽  
Globular Cluster System ◽  
Varying Mass

ABSTRACT We investigate whether the galaxy and star formation model used for the Auriga simulations can produce a realistic globular cluster (GC) population. We compare statistics of GC candidate star particles in the Auriga haloes with catalogues of the Milky Way (MW) and Andromeda (M31) GC populations. We find that the Auriga simulations do produce sufficient stellar mass for GC candidates at radii and metallicities that are typical for the MW GC system (GCS). We also find varying mass ratios of the simulated GC candidates relative to the observed mass in the MW and M31 GCSs for different bins of galactocentric radius metallicity (rgal–[Fe/H]). Overall, the Auriga simulations produce GC candidates with higher metallicities than the MW and M31 GCS and they are found at larger radii than observed. The Auriga simulations would require bound cluster formation efficiencies higher than 10 per cent for the metal-poor GC candidates, and those within the Solar radius should experience negligible destruction rates to be consistent with observations. GC candidates in the outer halo, on the other hand, should either have low formation efficiencies, or experience high mass-loss for the Auriga simulations to produce a GCS that is consistent with that of the MW or M31. Finally, the scatter in the metallicity as well as in the radial distribution between different Auriga runs is considerably smaller than the differences between that of the MW and M31 GCSs. The Auriga model is unlikely to give rise to a GCS that can be consistent with both galaxies.

scholarly journals Greener Solution to Waste Corn Stalks and Shortage of Asphalt Resource: Hydrochar Produced by Hydrothermal Carbonization as a Novel Performance Enhancer for Asphalt Binder

Materials ◽  
2021 ◽  
Vol 14 (6) ◽  
pp. 1427
Author(s):  
Xiaoming Wu ◽  
Chichun Hu
Keyword(s):  
High Temperature ◽  
Reaction Temperature ◽  
Storage Stability ◽  
Asphalt Binder ◽  
Aging Effect ◽  
Experimental Tests ◽  
Hydrothermal Carbonization ◽  
Modified Asphalt ◽  
Direct Combustion ◽  
Aging Property

Utilization of waste corn stalks (CS) has seized extensive attention due to high annual output and hazardous impact of piling aside or direct combustion on environment. However, previously there has been a lot of emphasis on improvement of its energy efficiency as solid fuel while limited investigations are available which explore the possibility of applying corn stalks as performance enhancer in asphalt binder. The purpose of this study is to examine the potential of employing hydrochar as modifiers in asphalt binder by a series of experimental tests. In this study, two hydrochar were produced from corn stalks by a novel process called hydrothermal carbonization at a different reaction temperature. The two hydrochar and their responding hydrochar-modified asphalt (HCMA) were tested by chemical and rheological tests. Chemical analysis detected the interaction between hydrochar and binder factions, resulting in poor compatibility but satisfying anti-aging property. Even though hydrochar increased the viscosity of bitumen, implying worse workability, and caused poor storage stability, ameliorated performance of asphalt binder at high temperature by incorporating hydrochar was verified by various criteria such as higher performance grade (PG) failure temperature and lower non-recoverable creep compliance (Jnr). Moreover, higher reaction temperature makes hydrochar’s particles smaller and more homogeneous, which results in slightly lower enhanced high temperature performance, more satisfying workability, better storage stability, and greater anti-aging effect of hydrochar-modified asphalt. Eventually, this study provided a promising win-win solution to environment problems concerning corn stalk treatment and shortage of asphalt binder. Further exploration of methods to improve HCMA’s storage stability, real-scale corroboration on trial section and life cycle assessment of asphalt pavement containing hydrochar modifiers will be followed in the future.

Performance improvement and aging property of oil/SBS modified asphalt

2021 ◽  
Vol 300 ◽  
pp. 123735
Author(s):  
Jing Xu ◽  
Jianzhong Pei ◽  
Jun Cai ◽  
Tao Liu ◽  
Yong Wen
Keyword(s):  
Performance Improvement ◽  
Modified Asphalt ◽  
Aging Property ◽  
Sbs Modified Asphalt

Activation of Enzymatic Hydrolysis Lignin by NaOH/Urea Aqueous Solution for Enhancing Its Sulfomethylation Reactivity

2018 ◽  
Vol 7 (1) ◽  
pp. 1120-1128 ◽  
Author(s):  
Binpeng Zhang ◽  
Dongjie Yang ◽  
Huan Wang ◽  
Yong Qian ◽  
JinHao Huang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Enzymatic Hydrolysis ◽  
Hydrolysis Lignin ◽  
Urea Aqueous Solution

Fractionation of enzymatic hydrolysis lignin by sequential extraction for enhancing antioxidant performance

2017 ◽  
Vol 99 ◽  
pp. 674-681 ◽  
Author(s):  
Liangliang An ◽  
Guanhua Wang ◽  
Hongyu Jia ◽  
Cuiyun Liu ◽  
Wenjie Sui ◽  
...  
Keyword(s):  
Enzymatic Hydrolysis ◽  
Sequential Extraction ◽  
Hydrolysis Lignin

scholarly journals Rheological Performance of Bio-Char Modified Asphalt with Different Particle Sizes

2018 ◽  
Vol 8 (9) ◽  
pp. 1665 ◽  
Author(s):  
Ran Zhang ◽  
Qingli Dai ◽  
Zhanping You ◽  
Hainian Wang ◽  
Chao Peng
Keyword(s):  
Porous Structure ◽  
Rough Surface ◽  
Asphalt Binder ◽  
Graphite Powder ◽  
Asphalt Binders ◽  
Particle Sizes ◽  
Flake Graphite ◽  
Petroleum Asphalt ◽  
Modified Asphalt ◽  
Sem Image

To improve the performance of petroleum asphalt, bio-char was used as a modifier for a petroleum asphalt binder, in this study. The rheological properties of bio-char modified asphalt binders were compared with different particle sizes and contents, with one control and one flake graphite modified asphalt binder. Specifically, the bio-char modifiers with two particle sizes (ranging from 75 μm–150 μm and less than 75 μm) and three contents of 2%, 4%, and 8% were added into the asphalt binder. A flake graphite powder with particle sizes less than 75 μm was used as a comparison modifier. The Scanning Electron Microscopy (SEM) image showed the porous structure and rough surface of bio-char as well as dense structure and smooth surface of flake graphite. A Rotational Viscosity (RV) test, Dynamic Shear Rheometer (DSR) test, aging test, and Bending Beam Rheometer (BBR) test were performed to evaluate the properties of bio-char modified asphalt in this study. Both modifiers could improve the rotational viscosities of the asphalt binders. The porous structure and rough surface of bio-char lead to larger adhesion interaction in asphalt binder than the smooth flake graphite. As a result, the bio-char modified asphalts had better high-temperature rutting resistance and anti-aging properties than the graphite modified asphalt, especially for the binders with the smaller-sized and higher content of bio-char particles. Furthermore, the asphalt binder modified by the bio-char with sizes less than 75 μm and about 4% content could also achieve a better low-temperature crack resistance, in comparison to other modified asphalt binders. Thus, this type of bio-char particles is recommended as a favorable modifier for asphalt binder.

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