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Viscoelastic Characteristics of Asphalt Binders at softening point Temperature

China Petroleum Processing & Petrochemical Technology 2014年第3期16卷 19-25页

作者： Fan Liang Lin Jian Wei Jianming Zhang Yuzhen Wang Lin State Key Laboratory of Heavy Oil Processing China University of Petroleum (East China) Highway Maintenance Technology Key Laboratory for Transportation Industry CPECC East-China Design Branch

In this paper, in order to investigate the viscoelasticity of asphalt binder at the softening point temperature, more than 30 different asphalt binders were selected and tested by dynamic rheological scan method using a dynamic shear rheometer(DSR). The softening points and the rheological parameters of the asphalt samples were measured and analyzed. The results indicated that at the softening point temperature the neat asphalt and the SBS modified asphalt showed two different rheological states. The neat asphalt binders had a majority of viscous components in viscoelastic composition, with the phase angles being mostly higher than 80 o. The SBS modified binders had lower phase angles, with their elasticity still retained. Meanwhile, the Shapiro-Wilk normality test showed that at a confidence level of 0.05, at whatever aging state, the neat asphalt had a stable complex modulus corresponding to the softening point, which was 13.034 kPa at a standard deviation of 2.105 kPa under the same test condition. The softening point of neat asphalt binder can be calculated via the equivalent modulus rule. It is found out that there is a good relationship between the calculated and the measured softening points. And it is suggested that more data are needed to validate this finding.

关键词： asphalt binder softening point viscoelasticity equivalent modulus temperature

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Studies on Effect of Tri（2-hydroxypropyl）, Tri（2-hydroxybutyl） and Tri（hydroxythiodiethylene） Borates on Thermal and Heat Properties of Rigid Polyurethane-Polyisocyanurate Foams

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Chinese Journal of Chemistry 2006年第12期24卷 1796-1799页

作者： CZUPRYNSKI Boguslaw PACIOREK-SADOWSKA Joanna LISZKOWSKA Joanna Casimir the Great Academy of Bydgoszcz Chodkiewicza str. 30 85-064 Bydgoszcz Poland

Effect of tri（2-hydroxypropyl）, tri（2-hydroxybutyl）and tri（hydroxythiodiethylene） borates （BT2HB, BT2HP and BTHET） on the thermal and heat properties of the rigid polyurethane-polyisocyanurate （PUR-PIR） foams was investigated： Increasing amounts of BT2HB and BT2HP in the foam composition, from 0.05 to 0.4 of chemical equivalent, caused increases in the softening point, the temperature of the first mass loss, the extrapolated tempera- ture of the main mass loss foam and temperature of the highest rate of the mass loss. In the case when BTHTE was added to the foam compositions, the lower increase in the mentioned above characteristic temperatures was observed as compared to those of standard foam （without borate added）.

关键词： rigid PUR-PIR foam heat and thermal resistance thermogravimetric analysis softening point

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Feasibility Investigation of Bitumen Properties by Blending of Coal Tar Pitch

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Advances in Chemical Engineering and Science 2023年第2期13卷 93-104页

作者： Bat-Erdene Erdenetsogt Zoltuya Khashbaatar Ilchgerel Dash Battsetseg Tsog Department of Chemical Engineering School of Applied Sciences Mongolian University of Science and Technology Ulaanbaatar Mongolia

There are numerous methods and additives available to improve the durability and quality of road bitumen. A coal tar obtained by coal coking was distilled in a laboratory into fractions of initial boiling point IBP-180℃ (gasoline-like fuel), 180℃ - 360℃ (diesel-like fuel), and >360℃ (residue or coal tar pitch). The coal tar pitch was added into road bitumen by up to 1 - 5 wt% and investigated the alteration of physical and chemical properties. The physico-mechanical properties of coal tar pitch and bitumen blends, as well as the chemical group composition, were determined using standard techniques (MNS) and the SARA method, respectively. Results of 3% coal tar pitch addition into bitumen enhanced ductility by 12.4% and softening point by 1.6℃. We found that blending with bitumen coal tar pitch as a modifier could improve bitumen properties.

关键词： Modified Bitumen Blending Coal Tar Pitch Ductility softening point

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Research on Enzymatic Hydrolysis Lignin Modified Petroleum Asphalt

Research on Enzymatic Hydrolysis Lignin Modified Petroleum A...

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The 1st International Congress on Advanced Materials 2011

作者： Zhidong Zhao Yanqiao Jin Yao Xie Xiansu Cheng Mingyang Xu College of Materials Science and Engineering Fuzhou University

In this paper,a series of enzymatic hydrolysis lignin modified petroleum asphalts were *** physical properties such as softening point,ductility at low temperature and penetration of the modified asphalt were *** 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 *** the EHL was 4%,the ductility was 39.0 ***,low temperature performance of asphalt could be further improved by adding EHL and a small amount of SBS.

关键词： Enzymatic Hydrolysis Lignin Polymers modified Asphalt Penetration softening point Ductility

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