Practice for Determining Low-Temperature Performance Grade (PG) of Asphalt Binders

2011 ◽  
Author(s):  
Keyword(s):  
Low Temperature ◽  
Asphalt Binders ◽  
Performance Grade ◽  
Temperature Performance ◽  
Low Temperature Performance

Field Validation of New Superpave Low-Temperature Binder Specification Procedure: Performance Data from Pennsylvania Test Sections

2000 ◽  
Vol 1728 (1) ◽  
pp. 60-67 ◽  
Author(s):  
Raj Dongré ◽  
Mark G. Bouldin ◽  
Dean A. Maurer
Keyword(s):  
Low Temperature ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Direct Tension ◽  
Transverse Cracking ◽  
Performance Grade ◽  
Temperature Performance ◽  
Test Road ◽  
Low Temperature Performance ◽  
And Performance

A new specification procedure was proposed recently to determine the low-temperature performance grade of asphalt binders. This new procedure uses bending beam rheometer (BBR) and direct tension test (DTT) data at two temperatures to determine the low-temperature grade of an asphalt binder. A study was conducted to validate this procedure by using asphalt binder retained samples from the widely published test road in Pennsylvania. This road was constructed in 1976 in Elk County, and performance—including low-temperature transverse cracking index—was monitored over 6 years. In this study, the retained binder samples from test sections T-1 to T-6 were tested with the BBR and the new Superpave® DTT. The data from these two tests were analyzed to obtain critical cracking temperatures and low-temperature performance grades. Results indicate that the new procedure correctly predicts the temperature at which cracking was observed in the field.

Viscoelastic-based approach to evaluate low temperature performance of asphalt binders

2016 ◽  
Vol 128 ◽  
pp. 384-398 ◽  
Author(s):  
H. Jahanbakhsh ◽  
Mohammad M. Karimi ◽  
F. Moghadas Nejad ◽  
Behnam Jahangiri
Keyword(s):  
Low Temperature ◽  
Asphalt Binders ◽  
Temperature Performance ◽  
Low Temperature Performance

Analysis of the Low Temperature Performance of Warm Mix Asphalt

2011 ◽  
Vol 71-78 ◽  
pp. 1259-1263
Author(s):  
Hai Jun Wang
Keyword(s):  
Low Temperature ◽  
Warm Mix Asphalt ◽  
Asphalt Binders ◽  
Asphalt Mixes ◽  
Temperature Performance ◽  
The Matrix ◽  
Low Temperature Performance

This template explains and demonstrates how to prepare your camera-ready paper for Trans Tech Publications. The best is to read these instructions and follow the outline of this text. The warm mix asphalt (WMA) refers to technologies that allow a significant reduction of mixing and compaction temperatures of asphalt mixes through lowering the viscosity of asphalt binders. In this paper, Shell90 # and SK70 # are two matrix asphalt with Sasobit® modifier to prepare for WMA's penetration and ductility, and calculate the equivalent crisp points, evaluate the low temperature performance at 5°C and 15°C, respectively. The results indicate that compared with the Shell90# without and with 5% Sasobit®, its penetration and ductility were reduced by 24.5%, 65.5% at 15°C. For SK70#, its penetration and ductility were reduced by 25.0%, 67.1%. WMA equivalent crisp points test with Shell90 # and SK70 #, compared with the matrix asphalt reduced by 10.03°C and 4.02°C, the addition of 3% Sasobit® to two matrix asphalt binders may also reduce ductility by 22.5% and 26.2%, respectively at 5°C.

Experimental Study on Polyphosphoric Acid (PPA) Modified Asphalt Binders

2010 ◽  
Vol 152-153 ◽  
pp. 288-294 ◽  
Author(s):  
Wei Dong Cao ◽  
Shu Tang Liu ◽  
Hong Lu Mao
Keyword(s):  
Low Temperature ◽  
Softening Point ◽  
Asphalt Binder ◽  
Asphalt Binders ◽  
Modified Asphalt ◽  
Temperature Performance ◽  
Point Test ◽  
Low Temperature Performance ◽  
Four Levels ◽  
Temperature Susceptibility

Polyphosphric acid (PPA) modified asphalt binders were produced in the laboratory using one base asphalt and four levels of PPA contents (0.6%, 1.0%, 1.5% and 2.0% by weight of base asphalt). Penetration test, softening point test, rotation viscosity test, creep test with bending beam rheometer (BBR) and four components test were carried out to study the performance of PPA modified asphalt binders and possible modification mechanism. The results indicate that the high-temperature performance of PPA modified asphalt binders are obviously improved and temperature susceptibility are decreased, but the low-temperature performance slightly decline compared with base asphalt. The PPA content has a very significant effect on softening point whereas it has no significant influence on low-temperature performance according to variance analysis (ANOVA). Finally, four components test reveals that the primary modification mechanism of PPA is the change of chemical composition of asphalt binder.

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