Micro-surfacing mixtures with reclaimed asphalt pavement: Mix design and performance evaluation

2019 ◽  
Vol 201 ◽  
pp. 303-313 ◽  
Author(s):  
Anping Wang ◽  
Shihui Shen ◽  
Xinghai Li ◽  
Bo Song
Keyword(s):  
Performance Evaluation ◽  
Asphalt Pavement ◽  
Mix Design ◽  
Reclaimed Asphalt Pavement ◽  
Reclaimed Asphalt ◽  
And Performance

scholarly journals A Method to Quantify Reclaimed Asphalt Pavement Binder Availability (Effective RAP Binder) in Recycled Asphalt Mixes

2019 ◽  
Vol 2673 (1) ◽  
pp. 205-216 ◽  
Author(s):  
Fawaz Kaseer ◽  
Edith Arámbula-Mercado ◽  
Amy Epps Martin
Keyword(s):  
Asphalt Pavement ◽  
Economic Benefits ◽  
Binder Content ◽  
Mix Design ◽  
Void Content ◽  
Reclaimed Asphalt Pavement ◽  
Asphalt Mixes ◽  
Reclaimed Asphalt ◽  
State Highway ◽  
Asphalt Mix

State highway agencies recognize the environmental and economic benefits of utilizing reclaimed asphalt pavement (RAP) in asphalt mixes. Currently, most agencies assume all of the RAP binder content is available for mix design purposes. However, the percentage of available or effective RAP binder in the asphalt mix is usually less than 100% and not quantified, which could yield dry asphalt mix with a high air void content, potentially leading to premature distress. The term available or effective RAP binder refers to the binder that is released from the RAP, becomes fluid, and blends with virgin binder under typical mixing temperatures. This study proposes a method to estimate the RAP binder availability factor (BAF) which can be used to adjust the virgin binder content in RAP mixes to ensure that the mix design optimum binder content is achieved. In this method, asphalt mixes were prepared so that, after mixing and conditioning, the RAP material can be separated from the virgin aggregate, which allows for a thorough evaluation of the extent of RAP binder availability in the asphalt mix. This method was verified in a preliminary experiment and then used to estimate the BAF of RAP from different sources, and a correlation between RAP BAF and the high temperature performance grade (PG) of each RAP source was established. Finally, factors affecting the RAP BAF were also evaluated such as mixing temperature, conditioning period, the use of recycling agents (or rejuvenators), and the method of adding the recycling agent to the mix.

Evaluation of Compaction Characteristics and Performance of Warm–Recycled Mix Asphalt

2011 ◽  
Vol 477 ◽  
pp. 23-29 ◽  
Author(s):  
Shi Fa Xu ◽  
Xiao Hui Luo ◽  
Jie Ji ◽  
Zhen Li
Keyword(s):  
Asphalt Pavement ◽  
Waste Materials ◽  
Reclaimed Asphalt Pavement ◽  
Test Results ◽  
Gas Emissions ◽  
Compaction Temperature ◽  
Reclaimed Asphalt ◽  
Compaction Characteristics ◽  
New Type ◽  
And Performance

Warm-Recycled Mix Asphalt (WRMA) is a new type mixture that can not only reduces the mixing temperature and exhausting gas emissions but also includes some waste materials (Reclaimed Asphalt Pavement, RAP).The compaction characteristics of WRMA were tested, while the compaction temperatures were 140°C, 130°C, 120°C, 110°C, 100°C and the RAP contents were 0%, 15%, 30%, 45%, and 60%, respectively. The compaction temperature for each WRMA was recommended according to the test results. Furthermore, this paper also evaluated the performances of each WRMA.

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