Performance Study on Asphalt Mortar with Dynamical Shear Rheometer

2014 ◽  
Vol 926-930 ◽  
pp. 605-609
Author(s):  
Li Xuan Ren
Keyword(s):  
High Temperature ◽  
Viscoelastic Property ◽  
Stress Responses ◽  
Filler Content ◽  
Final Analysis ◽  
High Shear ◽  
Dynamic Shear ◽  
Performance Study ◽  
Modified Asphalt ◽  
Asphalt Mortar

A series of asphalt mortars were prepared and tested by dynamic shear rheometer and other common evaluation methods aiming at investigating the physical performance of asphalt mortars. The final analysis shows that the changes of strength modulus and viscoelastic property rely on the composition differences in asphalt mortar, and modified asphalt and neat asphalt mortar have apparent different stress responses, and in micromechanics aspect, the asphalt mortar system with higher filler content is easy to be destroyed at high temperature and high shear frequency.

Powder Oil Ratio on Stability of Asphalt Mixture in High Temperature Effect

2013 ◽  
Vol 700 ◽  
pp. 175-178
Author(s):  
Guang Pu Hao
Keyword(s):  
Shear Strength ◽  
High Temperature ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Electron Microscope Observation ◽  
Dynamic Shear ◽  
High Temperature Stability ◽  
Asphalt Mortar ◽  
Scanning Electron ◽  
High Temperature Effect

According to the different powder oil ratio of asphalt mixture rutting experiment at high temperature, rotary experimenting machine, for different powder oil ratio dynamic shear experiment of asphalt mortar, using the scanning electron microscope observation on the microstructure of asphalt mortar, powder oil ratio on mixture high temperature stability influence. The experiment results show that: powder oil ratio is larger, stronger anti rut ability, and powder oil ratio is affected by the asphalt shear strength to influence high temperature stability of asphalt mixture, and put forward the best powder oil ratio in the range of 0.18~1.2.

Influence of Nanoparticles Modification on the Properties of Bitumen

2009 ◽  
Vol 614 ◽  
pp. 197-200 ◽  
Author(s):  
Shao Peng Wu ◽  
Gang Liu ◽  
Jin Gang Wang ◽  
Yuan Zhang
Keyword(s):  
High Temperature ◽  
Dynamic Viscosity ◽  
Inorganic Nanoparticles ◽  
Rheological Parameters ◽  
High Shear ◽  
Dynamic Shear ◽  
Shear Rates ◽  
Modify Bitumen ◽  
Modified Binders ◽  
Shear Rate Dependence

In this study, the influence of some inorganic nanoparticles on the properties of bitumen binder was investigated. Three types of particles at nanometer level, calcium carbonate powder, graphite and carbon black, were introduced to modify bitumen respectively. The modified binders were prepared using a laboratory high-shear mixer. A dynamic shear rheometer (DSR) was adopted to characterize the properties of modified binders, including their rheological parameters and dynamic viscosity, over a certain range sweeps of temperatures, frequencies and shear rates. It was found that the addition of the nanoparticles increased the binder’s elasticity at low temperature which might negatively influence its resistance to crack. However the decrease of phase angle at high temperature might improve its deformation resistance. The shear rate dependence of dynamic viscosity for the binders depended on the type of nanoparticle. The research results indicated that the addition of nanoparticles to bitumen binder can change its physical properties to some extent and its potential should be researched further.

scholarly journals Laboratory Study on Properties of Diatomite and Basalt Fiber Compound Modified Asphalt Mastic

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Yongchun Cheng ◽  
Chunfeng Zhu ◽  
Guojin Tan ◽  
Zehua Lv ◽  
Jinsheng Yang ◽  
...  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Basalt Fiber ◽  
Performance Study ◽  
Cone Penetration ◽  
Modified Asphalt ◽  
Asphalt Mastic ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Different Content

In order to improve the performance of asphalt mastic, some researchers have added diatomite or basalt fiber as a modifier to the asphalt mastic, and the results show that some properties of the asphalt mastic were improved. For the simultaneous addition of diatomite and basalt fiber, two kinds of modifier, compound modified asphalt mastic had not been reported; in this paper, thirteen groups of diatomite and basalt fiber (DBFCMAM) compound modified asphalt mastic with different content were prepared to study the performance. Softening point, cone penetration, viscosity, and DSR tests were conducted, for the high temperature performance evaluation of DBFCMAM, whereas force ductility and BBR tests were used in the low temperature performance study of the DBFCMAM. The results demonstrated that the high temperature performance of DBFCMAM was increased; moreover, the low temperature performance of DBFCMAM improved by diatomite and basalt fiber according to the results of the force ductility test; however, the conclusion of the BBR test data was inconsistent with the force ductility test. In summary, the high temperature and low temperature properties of DBFCMAM had been improved.

scholarly journals Influence of the Mineral Powder Content on the Asphalt Aging Resistance in High-Altitude Areas Based on Indoor Ultraviolet Light Tests

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 754
Author(s):  
Xiangbing Xie ◽  
Huixia Li ◽  
Junchao Duan ◽  
Guanghui Li ◽  
Shenjia Tong
Keyword(s):  
Low Temperature ◽  
Uv Irradiation ◽  
Filler Content ◽  
Mass Ratio ◽  
Stiffness Modulus ◽  
Modified Asphalt ◽  
Creep Stiffness ◽  
Mineral Powder ◽  
Powder Content ◽  
Asphalt Mortar

Intense ultraviolet irradiation is an important environmental factor affecting the service performance of asphalt mixtures in high-altitude areas, and the asphalt mortar is the main factor affecting the durability of asphalt mixtures. It is of great theoretical significance and engineering value to study the performance of the asphalt mortar at medium and low temperatures under ultraviolet irradiation. Therefore, this paper focuses on the evolution of the effect of the filler content on the rheological properties of different asphalt materials at low and medium temperatures under quantitative UV irradiation. Taking the average amount of UV irradiation observed annually in Northwest China as the indoor aging condition, the matrix asphalt mortar and modified asphalt mortar with different mass ratios of asphalt mortar are selected for indoor aging tests. Physical property tests, low-temperature performance tests, and dynamic shear rheological tests are carried out. The effects of the UV irradiation intensity and mineral powder content on the low temperature performance of the asphalt mortar are studied by variance analysis method, and the reasonable mass ratio range of the asphalt mortar under UV irradiation is proposed based on the standard residual square sum (STRSS) method. The results show that the temperature sensibility and low-temperature deformation energy significantly decrease with the increase in the filler content, while the values of the softening point, fatigue factor (G*sin δ), and creep stiffness modulus of the asphalt mortar increase. In addition, the variance analysis of the creep stiffness modulus aging index (SAI) shows that the ultraviolet radiation intensity has a significant impact on the performance of the asphalt mortar. When the mineral powder content is less than 40%. When the filler content is greater than 40%, the filler content effects the performance of the asphalt mortar. According to the standard residual square sum (STRSS) method, the best mass ratio of the base asphalt mortar is 1.096, and the best mass ratio of the modified asphalt mortar is 0.9091.

Study on Performance of Rubber Powder Modified Asphalt Mixture

2014 ◽  
Vol 599 ◽  
pp. 252-256 ◽  
Author(s):  
Yan Shuang Zhang ◽  
Quan Liang Li ◽  
Jian Zhong Dong ◽  
Qing Hu Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Key Words ◽  
Asphalt Mixture ◽  
Temperature Stability ◽  
Performance Study ◽  
High Temperature Stability ◽  
Rubber Powder ◽  
Modified Asphalt ◽  
Asphalt Performance

Through the asphalt performance experiment, obtains the best proportion of rubber powder. Through the contrast test of asphalt mixture, the water sensibility, high temperature stability and low temperature stability of asphalt mixture have been studied. Key words: rubber powder modified asphalt asphalt mixture performance study

Effects of UV Aging on the High-Temperature and Fatigue Performances of Asphalt Mortar

2011 ◽  
Vol 306-307 ◽  
pp. 1698-1701 ◽  
Author(s):  
Ling Pang ◽  
Lu Long ◽  
Shao Peng Wu ◽  
Wan Lu
Keyword(s):  
High Temperature ◽  
Film Thickness ◽  
Uv Radiation ◽  
Dynamic Viscosity ◽  
Aging Temperature ◽  
Pavement Performance ◽  
Dynamic Shear ◽  
Uv Aging ◽  
Main Factors ◽  
Asphalt Mortar

Ultraviolet(UV) radiation is one of the main factors induce asphalt aged in the field in-service. Asphalt mortar greatly affects the pavement performance. It is scarce that studies concerning UV aging on the performance of asphalt mortar. In this paper, asphalt mortar with a 1.0 F/A (filler to asphalt)after UV aging were subjected to the test of the Dynamic Shear Rheometer (DSR).Effects of UV aging on the High-Temperature and fatigue performances of asphalt mortar were studied by using the rutting parameter G*/sinδ, fatigue parameter G*sinδ and dynamic viscosity. The results show UV aging had prominent effect on asphalt mortar’s properties, with the decrease of film thickness and increase of UV aging temperature, the ability of rut resistance enhances and fatigue performance weakens.

Effect of Aging on the High-Temperature Rheological Properties of SBS Modified Asphalt

2010 ◽  
Vol 168-170 ◽  
pp. 2458-2463 ◽  
Author(s):  
Ning Li Li ◽  
Xin Po Zhao ◽  
Tie Hu Li ◽  
Jian Zhong Pei
Keyword(s):  
High Temperature ◽  
Service Life ◽  
Rheological Property ◽  
Theoretical Basis ◽  
Asphalt Mixture ◽  
Dynamic Shear ◽  
Modified Asphalt ◽  
Before And After ◽  
Sbs Modified Asphalt ◽  
Rotation Viscometer

the aging existing in use and construction of bituminous pavement will directly resulting in shortening of the pavement’s service life. It is provide the theoretical basis of the design and construction of the SBS modified asphalt mixture to analyze the influence of aging to the rheological property of SBS modified asphalt under high temperature. The testing for the rheological property of three kinds SBS modified asphalt under high temperature has been finished before and after the aging in construction by Brookfield DV Ⅱ+ type of rotation viscometer. The results indicated that viscosity will be increased and the sensitivity of SBS modified asphalt to viscosity will also be lowered along with increase of aging degree. The testing for the rheological property of three kinds of SBS modified asphalt has been finished before and after aging in usage period by the dynamic shear rheometer (DSR). The results shown that G* will be continually increased along with increase of aging degree and this is consistent with change of base asphalt. And this shown that the increase of G* can only come down to oxidation and aging of base asphalt contained in the modified asphalt and also, asphaltene in SBS modified asphalt will be changing in the mode same with that of base asphalt.

Research on the High Temperature Properties of Sasobit Warm Mix Asphalt Mortar

2011 ◽  
Vol 128-129 ◽  
pp. 430-433
Author(s):  
Song Ye ◽  
Bin Guo
Keyword(s):  
High Temperature ◽  
Viscoelastic Properties ◽  
Temperature Stability ◽  
Warm Mix Asphalt ◽  
Dynamic Shear ◽  
High Temperature Stability ◽  
Dynamic Shear Rheometer ◽  
High Temperature Properties ◽  
Asphalt Mortar

Using the Dynamic Shear Rheometer (DSR) to do the dynamic viscoelastic properties test for asphalt mortar which added Sasobit, to analyze the G*/sinδ trends of asphalt mortar and warm mix asphalt mortar, then to get the high temperature stability of warm mix asphalt mortar. The results indicate that following the increasing of filler-bitumen ratio the G*/sinδ value of warm asphalt mortar is decreased when the temperature is the same; The G*/sinδ value of asphalt mortar with Sasobit than not, show that Sasobit can be increased the high temperature stability of asphalt mortar.

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.

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