Comparative Study on Water Aging of Rubber Asphalt and TOR Rubber Asphat

2012 ◽  
Vol 178-181 ◽  
pp. 1383-1386 ◽  
Author(s):  
Peng Xiao ◽  
Mei Ping Wu ◽  
Shan Shan Shi ◽  
Dean Jiang
Keyword(s):  
High Temperature ◽  
Sodium Chloride ◽  
Low Temperature ◽  
Ph Value ◽  
Chloride Content ◽  
Dynamic Shear ◽  
Bending Beam Rheometer ◽  
Temperature Performance ◽  
Aging Properties ◽  
Better Than

Brookfield Viscometer, Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) are employed to analyze properties of rubber asphalt and TOR rubber asphalt after water aging. Through simulating, the influences of parameter changes of water on the performances of asphalts after aging were studied. The results show that the PH value and sodium chloride content of water affects the aging properties of asphalt, and as the parameter changes, the high temperature performance of TOR rubber asphalt are better than rubber asphalt. DSR and BBR tests reveal that the higher the acidity (or the lower PH value) and the sodium chloride content of water are, the more seriously rubber asphalt and TOR rubber asphalt age in water aging; the lower the temperature is, the larger the S value and the smaller the m value become, and the worse the low temperature performance and dissipation of temperature stress of rubber asphalt and TOR rubber asphalt get.

Analysis of Low Temperature and High Temperature Performance of Different Aggregate SMA

2013 ◽  
Vol 834-836 ◽  
pp. 252-258
Author(s):  
Peng Ren ◽  
Bo Zhang ◽  
Ya Qiao Wang ◽  
Lu Zhang ◽  
Lin Zhao
Keyword(s):  
Experimental Data ◽  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Limestone Aggregate ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Temperature Test ◽  
Better Than

Three kinds of combination schemes were designed about SMA-13 asphalt mixture. They were basalt aggregate SMA, limestone aggregate SMA, basalt and limestone aggregate SMA. Through the study of low temperature and high temperature test of three kinds of combination, the low temperature performance of basalt and limestone aggregate SMA was better than that of the basalt aggregate SMA; and the high temperature performance was in between, thus providing important experimental data for the limestones replacing basalt in SMA pavement.

Research of the Recycled Asphalt 's Rheological Behavior

2012 ◽  
Vol 550-553 ◽  
pp. 2395-2401
Author(s):  
Jin Li
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Behavior ◽  
Dynamic Shear ◽  
Dynamic Shear Rheometer ◽  
Bending Beam Rheometer ◽  
Recycled Asphalt

Analyze the rheology of recycled asphalts used by three rejuvenators：R1、R2、R3，the study of recycled asphalt's rheological behavior adopt BBR(Bending Beam Rheometer) and DSR(Dynamic Shear Rheometer). From the result of experiment：the usage of rejuvenator reduce the asphalt ability of anti-tracking under high temperature, some of them can even recover to the level of fresh asphalt；the mix of rejuvenators improve largely the asphalt ability of resistance to fatigue and the ability of anti-cracking under low temperature.

Research on Performance of the Modified Asphalt by Diatomite-Cellulose Composite

2010 ◽  
Vol 158 ◽  
pp. 211-218 ◽  
Author(s):  
Yong Sheng Sun ◽  
Xiao Long Chen ◽  
Yue Xin Han ◽  
Bin Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Synergistic Effect ◽  
Ash Content ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance ◽  
Temperature Susceptibility ◽  
Cellulose Composite ◽  
Better Than

The diatomite-cellulose composite (DCC) was used to modified asphalt for pavement in the study, and then the high temperature performance, low temperature performance and temperature susceptibility of asphalt were studied. The results showed that these performances of asphalt were all improved after modified by DCC, and the performance of modified asphalt significantly associated with the ash content of DCC, and H-3 DCC was the best. The performance of modified asphalt by DCC was obviously better than using diatomite and cellulose directly. The improving properties of modified asphalt by DCC were caused by synergistic effect of diatomite and cellulose.

URANUS 52N

Alloy Digest ◽  
1994 ◽  
Vol 43 (5) ◽  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Flue Gas ◽  
Crevice Corrosion ◽  
Heat Treating ◽  
Flue Gas Desulfurization ◽  
Temperature Performance ◽  
Aisi Type ◽  
Better Than

Abstract URANUS 52N is a nitrogen-alloyed duplex stainless steel improved in stress-corrosion cracking resistance and with pitting and crevice corrosion resistance better than AISI Type 317L. Applications include handling phosphoric acid contaminated with chlorides and in flue gas desulfurization scrubbers. This datasheet provides information on composition, physical properties, and tensile properties. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SS-566. Producer or source: Creusot-Marrel.

CHRO-MOW

Alloy Digest ◽  
1958 ◽  
Vol 7 (2) ◽  
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Heat Treating ◽  
Steel Company ◽  
Temperature Performance ◽  
Hot Work Steel ◽  
Crucible Steel ◽  
Red Hardness

Abstract CHRO-MOW is a tough hot work steel which will harden from a relatively low temperature in air. It possesses a desirable combination of toughness and red-hardness. This datasheet provides information on composition, physical properties, hardness, and tensile properties. It also includes information on high temperature performance as well as forming, heat treating, and machining. Filing Code: TS-67. Producer or source: Crucible Steel Company of America.

NICLOY 5

Alloy Digest ◽  
1960 ◽  
Vol 9 (3) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Low Temperature ◽  
Physical Properties ◽  
Tensile Properties ◽  
Ferritic Steel ◽  
Heat Treating ◽  
Low Carbon ◽  
Temperature Performance

Abstract NICLOY 5 is a low carbon, nickel ferritic steel reecommended for low temperature service. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as fracture toughness. It also includes information on low and high temperature performance, and corrosion resistance as well as forming, heat treating, machining, and joining. Filing Code: SA-96. Producer or source: Babcock & Wilcox Company.

scholarly journals Evaluation of Micro-Mechanism and High- and Low-Temperature Rheological Properties of Disintegrated High Volume Crumb Rubber Asphalt (DHVRA)

Materials ◽  
2021 ◽  
Vol 14 (5) ◽  
pp. 1145
Author(s):  
Wei Li ◽  
Sen Han ◽  
Xiaokang Fu ◽  
Ke Huang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Rheological Properties ◽  
Particle Diameter ◽  
Gel Permeation Chromatography ◽  
High Volume ◽  
Crumb Rubber ◽  
Test Method ◽  
Polar Component ◽  
Temperature Performance

The aims of this paper are to prepare disintegrated high volume crumb rubber asphalt (DHVRA) with low viscosity, good workability and low-temperature performance by adding disintegrating agent (DA) in the preparation process, and to further analyze the disintegrating mechanism and evaluated high-temperature and low-temperature rheological properties. To obtain DHVRA with excellent comprehensive performance, the optimum DA dosage was determined. Based on long-term disintegrating tests and the Fluorescence Microscopy (FM) method, the correlations between key indexes and crumb rubber (CR) particle diameter was analyzed, and the evaluation indicator and disintegrating stage division standard were put forward. Furthermore, Fourier transform infrared spectroscopy (FT-IR) and Gel Permeation Chromatography (GPC) was used to reveal the reaction mechanism, and the contact angle test method was adopted to evaluate the surface free energy (SFE). In addition, the high-temperature and low-temperature rheological properties were measured, and the optimum CR content was proposed. Results indicated that the optimum DA dosage was 7.5‰, and the addition of DA promoted the melt decomposition of CR, reduced the viscosity and improved the storage stability. The 135 °C rotational viscosity (RV) of DHVRA from mixing for 3 h could be reduced to 1.475 Pa·s, and the softening point difference was even less than 2 °C. The linear correlation between 135 °C RV and the diameter of CR particle in rubber asphalt system was as high as 0.968, and the viscosity decay rate (VDR) was used as the standard to divide the disintegrating process into a fast disintegrating stage, stable disintegrating stage and slight disintegrating stage. Compared to common rubber asphalt (CRA), DHVRA has an absorption peak at 960 cm−1 caused by trans olefin = C-H, and higher molecular weight and polar component of surface energy. Compared with CRA, although the high-temperature performance of DHVRA decreases slightly, the low-temperature relaxation ability can be greatly improved.

scholarly journals Study on Performance Damage and Mechanism Analysis of Asphalt under Action of Chloride Salt Erosion

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3089
Author(s):  
Peilei Zhou ◽  
Wensheng Wang ◽  
Lili Zhu ◽  
Haoyun Wang ◽  
Yongming Ai
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
High Temperature ◽  
Low Temperature ◽  
Temperature Sensitivity ◽  
Salt Solution ◽  
Solution Concentration ◽  
Chloride Salt ◽  
Temperature Performance ◽  
Low Temperature Performance

This study aims to investigate the performance evolution and mechanism of asphalt under action of chloride salt erosion. Asphalt samples soaked with five different snow melting chloride salt concentrations were taken as the research object. Then, the high-temperature performance, low-temperature performance, temperature sensitivity and asphalt–aggregate adhesion property of asphalt samples were carried out. Additionally, Fourier transform infrared spectroscopy (FTIR) was used to explore the mechanism of chloride salt erosion on asphalt. Test results showed the linear variation relationships of high-temperature performance, low-temperature performance and temperature sensitivity with chloride salt concentrations. The high-temperature performance of asphalt would be improved by chloride snowmelt salt. With the increase in the chloride salt solution concentration, the low-temperature performance of asphalt became worse, and the temperature sensitivity increased. Moreover, after the effect of the chloride salt solution, the asphalt–aggregate adhesion property decreased with the increase in the chloride salt solution concentration. It is necessary to control the amount of chloride snowmelt salt in the actual snow removal projects. Finally, based on Fourier transform infrared spectroscopy, the mechanism of chloride salt erosion on asphalt was preliminarily explored. With the increase in the chloride salt solution concentration, the proportion of light components (saturated fraction, aromatic fraction) in asphalt decreased, and the proportion of heavy components (resin and asphaltene) with good thermal stability increased.

Applied Research of the Modifying Agent of Rubber Plastic Composite (MaR) in Asphalt Mixture

2013 ◽  
Vol 477-478 ◽  
pp. 1175-1178
Author(s):  
Ling Zou ◽  
Jing Wei Ne ◽  
Weng Gang Zhang
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Asphalt Mixture ◽  
Bending Test ◽  
Water Stability ◽  
Modified Asphalt ◽  
Modifying Agent ◽  
Temperature Performance ◽  
Splitting Test ◽  
Low Temperature Performance

70# and 90# matrix asphalt mixture with MaR were studied through dynamic modulus test, rutting test, freeze-thaw splitting test, bending test to study the applicability of the Modifying agent of rubber plastic compound (MaR) in matrix asphalt mixture.Test results were Compared with SBSI-C modified asphalt mixture.The results indicate that: high-temperature stability of MaR+70# asphalt mixture is as well as SBSI-C modified asphalt mixture,and is bettere than MaR+90# asphalt mixture; water stability of MaR+90# asphalt mixture is bettere than SBSI-C modified asphalt mixture and MaR+70# asphalt mixture; low temperature performance of MaR+90# asphalt mixture is bettere than MaR+70# asphalt mixture, but is worse than modified asphalt mixture SBSI-C ; MaR+70# asphalt mixture can be first used in area of resisting high temperature and rutting, MaR+90# asphalt mixture can be used if the water stability performance and low temperature performance are considered.

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