Low Temperature Tensile Characteristics of Warm-Mix Asphalt Mixtures

2014 ◽  
Vol 42 (4) ◽  
pp. 20120364 ◽  
Author(s):  
Kyu-Seok Yeon ◽  
Sungun Kim ◽  
Hyong-Jong Lee ◽  
Kwang W. Kim
Keyword(s):  
Low Temperature ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures

Evaluation of Low-Temperature Cracking Performance of Warm-Mix Asphalt Mixtures

2012 ◽  
Vol 2294 (1) ◽  
pp. 81-88 ◽  
Author(s):  
Brian Hill ◽  
Behzad Behnia ◽  
Salman Hakimzadeh ◽  
William G. Buttlar ◽  
Henrique Reis
Keyword(s):  
Low Temperature ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Cracking Performance ◽  
Low Temperature Cracking

scholarly journals Influence of Selected Warm Mix Asphalt Additives on Cracking Susceptibility of Asphalt Mixtures

Materials ◽  
2020 ◽  
Vol 13 (1) ◽  
pp. 202 ◽  
Author(s):  
Marcin Stienss ◽  
Cezary Szydlowski
Keyword(s):  
Low Temperature ◽  
Warm Mix Asphalt ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Test Results ◽  
Specimen Test ◽  
Low Temperature Cracking ◽  
Long Term Performance ◽  
Term Performance

Warm mix asphalt (WMA) has been widely accepted as a future asphalt paving technology. Besides clear advantages, there are still some concerns regarding durability and long-term performance of pavements made with this type of asphalt mixtures. One of the most important issues is low temperature behaviour of WMA because certain additives used for temperature reduction can affect bitumen properties. This paper presents the evaluation of low-temperature properties of laboratory-produced asphalt concrete for wearing course with selected WMA additives. One type of bitumen with paving grade 50/70 and five WMA additives of different nature (organic, surface tension reducer and combination of both) were used in this study. The production and compaction temperature of mixtures containing WMA additives was 25 °C lower in comparison with the temperature of the reference mix. To assess the susceptibility of WMA to low-temperature cracking, Semi-Circular Bending (SCB) and Thermal Stress Restrained Specimen Test (TSRST) were used. Supplementary rating was made by analysing Bending Beam Rheometer (BBR) test results of asphalt binders.

Low-temperature performance of recycled asphalt mixtures under static and oscillatory loading

2016 ◽  
Vol 18 (2) ◽  
pp. 297-314 ◽  
Author(s):  
Ki Hoon Moon ◽  
Augusto Cannone Falchetto ◽  
Di Wang ◽  
Michael P. Wistuba ◽  
Gabriele Tebaldi
Keyword(s):  
Low Temperature ◽  
Asphalt Mixtures ◽  
Recycled Asphalt ◽  
Temperature Performance ◽  
Low Temperature Performance

scholarly journals Influence of Bitumen Type and Asphalt Mixture Composition on Low-Temperature Strength Properties According to Various Test Methods

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2118 ◽  
Author(s):  
Marek Pszczola ◽  
Cezary Szydlowski
Keyword(s):  
Tensile Strength ◽  
Low Temperature ◽  
Cooling Rate ◽  
Strength Properties ◽  
Test Methods ◽  
Asphalt Mixtures ◽  
Bending Test ◽  
Mixture Composition ◽  
Tension Stress ◽  
Strength Reserve

In regions with low-temperatures, action transverse cracks can appear in asphalt pavements as a result of thermal stresses that exceed the fracture strength of materials used in asphalt layers. To better understand thermal cracking phenomenon, strength properties of different asphalt mixtures were investigated. Four test methods were used to assess the influence of bitumen type and mixture composition on tensile strength properties of asphalt mixtures: tensile strength was measured using the thermal stress restrained specimen test (TSRST) and the uniaxial tension stress test (UTST), flexural strength was measured using the bending beam test (BBT), and fracture toughness was measured using the semi-circular bending test (SCB). The strength reserve behavior of tested asphalt mixtures was assessed as well. The influence of cooling rate on the strength reserve was investigated and correlations between results from different test methods were also analyzed and discussed. It was observed that the type of bitumen was a factor of crucial importance to low-temperature properties of the tested asphalt concretes. This conclusion was valid for all test methods that were used. It was also observed that the level of cooling rate influenced the strength reserve and, in consequence, resistance to low-temperature cracking. It was concluded that reasonably good correlations were observed between strength results for the UTST, BBT, and SCB test methods.

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