Preliminary Mixture Design Procedure for Recycled Asphalt Materials

2009 ◽  
pp. 47-47-21 ◽  
Author(s):  
TW Kennedy ◽  
I Perez
Keyword(s):  
Design Procedure ◽  
Mixture Design ◽  
Recycled Asphalt ◽  
Asphalt Materials

Mitigation of permanent deformation in base layer containing recycled asphalt aggregates

2013 ◽  
Vol 40 (2) ◽  
pp. 181-187 ◽  
Author(s):  
Jean-Pascal Bilodeau ◽  
Guy Doré ◽  
Jonas Depatie
Keyword(s):  
Asphalt Concrete ◽  
Deformation Behaviour ◽  
Permanent Deformation ◽  
Design Procedure ◽  
Base Layer ◽  
Repeated Loading ◽  
Recycled Asphalt ◽  
Thickness Increase ◽  
Permanent Strain ◽  
Pavement Base

The use of recycled asphalt pavement (RAP) aggregates as replacement for new materials in the pavement base weakens the layer in regards to the resistance to permanent deformation under repeated loading. A mechanistic based design procedure is proposed to ensure that base layers containing RAP particles have a similar rutting behaviour to base layers made of virgin aggregates. The design procedure allows calculating an asphalt concrete thickness increase that is based on permanent deformation behaviour of base materials. The calculation approach is based on multistage triaxial permanent deformation tests performed on granular material samples with varied RAP content. The tests allowed proposing an equation that relates permanent strain rate, RAP content, and deviatoric stress, which is the basis of the design procedure. Design charts are proposed to select adequate thickness increase for the asphalt concrete layer according to the expected RAP content in the base layer and asphalt concrete modulus.

The impact of aging heterogeneities within RAP binder on recycled asphalt mixture design

2021 ◽  
Vol 300 ◽  
pp. 124260
Author(s):  
Wellington L.G. Ferreira ◽  
Verônica T.F. Castelo Branco ◽  
Kamilla Vasconcelos ◽  
Amit Bhasin ◽  
Anand Sreeram
Keyword(s):  
Asphalt Mixture ◽  
Mixture Design ◽  
Recycled Asphalt ◽  
The Impact

The Performance of Recycled Asphalt Materials I

2013 ◽  
Vol 668 ◽  
pp. 309-312
Author(s):  
Jia Liang
Keyword(s):  
Asphalt Concrete ◽  
Softening Point ◽  
Concrete Pavement ◽  
Recycled Asphalt ◽  
The Past ◽  
Comparison Results ◽  
Asphalt Materials ◽  
Asphalt Concrete Pavement

In the past few years, recycled asphalt materials have been used successfully in asphalt concrete pavement in China. However, there are no results of the performance of using abson method and vacuum rotating reclaim to recycled asphalt. The objective of this study is to investigation performance of recycled asphalt materials using abson method and vacuum rotating reclaim. Abson method and vacuum rotating reclaim were implemented to analyze the characteristics of different aging degree recycled asphalt in this article. Lanlian-70 asphalt put into pressure aging vessels after the time of 0 hour,5 hour,10 hour,15 hour, 20 hour of aging. Afterwards, the different aging degree asphalt was dissolved by trichloroethylene, and then asphalt solution reclaimed using abson method and vacuum rotating reclaim. In the end, the performances of recycled asphalt were tested, such as penetration, softening point, ductility. The characteristics were compared of different aging degree recycled asphalt and origin asphalt. Comparison results indicate that the indexes of recycled asphalt are decease of the penetration and ductility, increase of softening point. However, decreased value and increased value is minimal. Therefore, recycled asphalt will not make asphalt ageing in the process of recycled asphalt.

Using recycled asphalt materials as an alternative material source in asphalt pavements

2013 ◽  
Vol 18 (1) ◽  
pp. 149-159 ◽  
Author(s):  
Ki Hoon Moon ◽  
Augusto Cannone Falchetto ◽  
Mihai Marasteanu ◽  
Mugurel Turos
Keyword(s):  
Asphalt Pavements ◽  
Recycled Asphalt ◽  
Material Source ◽  
Asphalt Materials ◽  
Alternative Material

scholarly journals Development of Concrete Mixture Design Process Using MCDM Approach for Sustainable Concrete Quality Management

2020 ◽  
Vol 12 (19) ◽  
pp. 8110
Author(s):  
Mohd. Ahmed ◽  
Javed Mallick ◽  
Saeed AlQadhi ◽  
Nabil Ben Kahla
Keyword(s):  
Quality Management ◽  
Design Process ◽  
Design Procedure ◽  
Mixture Design ◽  
Design Methods ◽  
Concrete Mixture ◽  
Sustainable Concrete ◽  
Concrete Production ◽  
Concrete Mix ◽  
Concrete Quality

The development of a concrete mixture design process for high-quality concrete production with sustainable values is a complex process because of the multiple required properties at the green/hardened state of concrete and the interdependency of concrete mixture parameters. A new multicriteria decision making (MCDM) technique based on Technique of Order Preference Similarity to the Ideal Solution (TOPSIS) methodology is applied to a fuzzy setting for the selection of concrete mix factors and concrete mixture design methods with the aim towards sustainable concrete quality management. Three objective properties for sustainable quality concrete are adopted as criteria in the proposed MCDM model. The seven most dominant concrete mixture parameters with consideration to sustainable concrete quality issues, i.e., environmental (density, durability) and socioeconomic criteria (cost, optimum mixture ingredients ratios), are proposed as sub-criteria. Three mixture design techniques that have potentiality to include sustainable aspects in their design procedure, two advanced and one conventional concrete mixture design method, are taken as alternatives in the MCDM model. The proposed selection support framework may be utilized in updating concrete design methods for sustainability and in deciding the most dominant concrete mix factors that can provide sustainable quality management in concrete production as well as in concrete construction. The concrete mix factors found to be most influential to produce sustainable concrete quality include the water/cement ratio and density. The outcomes of the proposed MCDM model of fuzzy TOPSIS are consistent with the published literature and theory. The DOE method was found to be more suitable in sustainable concrete quality management considering its applicable objective quality properties and concrete mix factors.

Feasibility Research on Superpave Gyratory Compactor Method Design Mix of Stone Mastic Asphalt

2014 ◽  
Vol 599 ◽  
pp. 159-163 ◽  
Author(s):  
Wei Ping Cui ◽  
Lei Chen ◽  
Zhi Xin Yu ◽  
Li Juan Qin
Keyword(s):  
Design Procedure ◽  
Mixture Design ◽  
Mastic Asphalt ◽  
Feasibility Research ◽  
Superpave Gyratory Compactor ◽  
Stone Mastic Asphalt

This paper analyzed the limitation of the stone mastic asphalt (SMA) mixture designing methods in China, then the Superpave Gyratory Compactor(SGC) method for SMA mixture where designing applicable and feasibility was analyzed, and SGC method was introduced to promote the application in SMA mixture design. It is found that the compaction work determined by the SGC design procedure was remarkably increased compared to that by Marshall design when the number of gyrations is 100. It is recommended that the number of gyrations should be decreased instead of 100 when SGC is used to design SMA mixture in China.

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