LONG-TERM PERFORMANCE OF RECYCLED ASPHALT MIXTURES IN COLD, SNOWY REGIONS

Abstract High content reclaimed asphalt (RA) mixtures have been identified as one of the options to reduce the environmental and economic impacts of pavements construction. However, the process of designing and producing high content RA mixtures is challenging and the asphalt industry have serious concerns towards quality and long-term performance these mixtures. In laboratory, several parameters affect mixture characteristic, and if not controlled, may results into inaccurate estimation of performance. This state- of-the-art study aims to identify critical parameters for high content RA mixture production and highlight the effects of these parameters on mixture performance. The mixing parameters adopted in several laboratory studies have been highlighted and compared. The best practices to mix recycled asphalt in laboratory are reviewed in order to optimize the laboratory mixing. Based on review, important considerations for evaluating laboratory performance have been discussed.

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Evaluation of long-term performance of cold in-place recycled asphalt roads

10.31274/rtd-180813-162 ◽

2006 ◽

Author(s):

Dong Chen

Keyword(s):

Recycled Asphalt ◽

Long Term Performance ◽

Term Performance

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Long-Term Performance Evaluation of Recycled Asphalt Pavement Results from Texas

Transportation Research Record Journal of the Transportation Research Board ◽

10.3141/2180-07 ◽

2010 ◽

Vol 2180 (1) ◽

pp. 58-66 ◽

Cited By ~ 39

Author(s):

Feng Hong ◽

Dar-Hao Chen ◽

Magdy M. Mikhail

Keyword(s):

Performance Evaluation ◽

Asphalt Pavement ◽

Recycled Asphalt Pavement ◽

Recycled Asphalt ◽

Long Term Performance ◽

Term Performance

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Cold Recycling of Waste Asphalt Pavement in Cold Region

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.183-185.319 ◽

2011 ◽

Vol 183-185 ◽

pp. 319-322

Author(s):

Yong Li Xu ◽

Pei Feng Cheng ◽

Guo Feng Liu ◽

Ming Chen Lei

Keyword(s):

Low Temperature ◽

Bending Test ◽

Asphalt Pavements ◽

Recycled Asphalt ◽

Split Test ◽

Cold Recycling ◽

Long Term Performance ◽

Emulsified Asphalt ◽

Term Performance

The characteristics of the mixture of recycled asphalt pavements with emulsified asphalt and cement, as the pavement material, was investigated in this research. Kantabro Loss test was used to evaluate initial performance of the recycling mixture and to propose appropriate parameter. Rutting test, split test and low-temperature bending test were carried out to evaluate the long-term performance. The performance of the mixture at low temperature was one of the most important factors to be considered to ensure its application in cold areas. The results showed that the performance of the mixture was effect by old mixes milled. The proposed application conditions of the recycled mixture were also discussed in this paper.

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Effects of Cement–Mineral Filler on Asphalt Mixture Performance under Different Aging Procedures

Applied Sciences ◽

10.3390/app9183785 ◽

2019 ◽

Vol 9 (18) ◽

pp. 3785 ◽

Cited By ~ 2

Author(s):

Zhenyang Fan ◽

Xuancang Wang ◽

Zhuo Zhang ◽

Yi Zhang

Keyword(s):

Asphalt Mixture ◽

Tensile Tests ◽

Asphalt Mixtures ◽

Modified Asphalt ◽

The Road ◽

Aging Conditions ◽

Mineral Powder ◽

Long Term Performance ◽

Term Performance

Cement-containing mineral powder can effectively improve the moisture stability of an asphalt mixture; therefore, this study systematically summarizes the research status of cement–mineral fillers on the performance of an asphalt mixture and determines the limitations of related studies. In this study, long-term performance tests of styrene-butadiene-styrene- (SBS)-modified asphalt mixtures are designed and evaluated with different blending ratios of the cement–mineral powder under three aging conditions. Moreover, the effect of the cement–mineral composite filler on long-term performance of the asphalt mixture using different blending ratios is determined. Cement improves the high-temperature performance and water stability of asphalt mixtures, but only for certain aging conditions. Considering the regulations for the road performance of asphalt mixtures for three aging conditions, as well as long-term performance considerations, the results indicated that the mass ratio of Portland cement to mineral powder must not exceed 2:2. Low-temperature bending and splitting tensile tests confirmed that an excessive amount of cement filler will embrittle the modified asphalt mixture during long-term aging, thereby deteriorating the tensile properties. The mechanism by which the filler influences the performance of the asphalt mixture should be further studied from the perspective of microscopic and molecular dynamics.

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

Materials ◽

10.3390/ma13010202 ◽

2020 ◽

Vol 13 (1) ◽

pp. 202 ◽

Cited By ~ 2

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.

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