scholarly journals Investigation of the Effect of Recycled Asphalt Pavement Material on Permeability and Bearing Capacity in the Base Layer

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Ayşegül Güneş Seferoğlu ◽  
Mehmet Tevfik Seferoğlu ◽  
Muhammet Vefa Akpınar
Keyword(s):  
Bearing Capacity ◽  
Asphalt Pavement ◽  
Linear Increase ◽  
Base Layer ◽  
Sieve Analysis ◽  
Recycled Asphalt Pavement ◽  
Recycled Asphalt ◽  
Suitable Material ◽  
Base Course ◽  
Aggregate Base

The purpose of this research was to investigate the effects of recycled asphalt pavement (RAP) and cement content on the permeability and bearing capacity characteristics of aggregate base courses. Mixtures containing untreated RAP ranging between 0 and 100 percent and 1, 2, and 3% cement-treated RAP were subjected to laboratory tests (bitumen content, sieve analysis, modified proctor, soaked California bearing ratio (CBR), and constant-level permeability tests). The results showed that, as the RAP percentage in the mixture increased, CBR values decreased considerably. Moreover, there is a linear increase in the CBR values with cement treatment. Optimum moisture contents (OMC) and maximum dry densities (MDD) showed a decreasing trend. Increasing the cement percentages in 100% RAP blend increases the OMC and MDD values. The permeability of RAP showed a decrease as the percentage of RAP and cement increased in blends. The study showed that the CBR value of the 20% RAP blend is also obtained in the 100% RAP/3% cement-treated blend. Thus, it has been understood that cement is a suitable material in order to increase the use of RAP. In addition, the increase in the percentage of RAP and cement made the base course more impermeable.

Research on Shrinking Performance of Recycled Asphalt Pavement Material Stabilized with Inorganic Binder

2015 ◽  
Vol 727-728 ◽  
pp. 25-29
Author(s):  
Bo Peng ◽  
Wen Ying Li ◽  
Guang Kai Yin ◽  
Zhi Hao Cheng
Keyword(s):  
Fly Ash ◽  
Asphalt Pavement ◽  
Recycled Asphalt Pavement ◽  
Recycled Asphalt ◽  
Inorganic Binder ◽  
Different Types ◽  
Dry Shrinkage ◽  
Erosion Properties ◽  
Base Course ◽  
Test Result

This paper studies on shrinkage performance of recycled asphalt pavement (RAP) material blended with inorganic binder such as cement, lime-fly ash (lime and fly ash) and three ashes (cement, lime and fly ash), with certain intensity used as base course. The erosion, dry shrinkage and temperature shrinkage tests were conducted on the recycled asphalt pavement (RAP) material blended with the three kinds of inorganic binder, to evaluate and compare different types of cold recycled inorganic material shrinkage resistance capability and anti-erosion properties. After analyzing the fatigue test result of three-additives-stabilized recycled mixture, it showed that the recycled pavement mixture owned preferable anti-erosion properties, anti-temperature shrinkage resistance and anti-dry shrinkage performance.

Laboratory characterisation of recycled asphalt pavement as a base layer

2010 ◽  
Vol 11 (2) ◽  
pp. 123-131 ◽  
Author(s):  
Tahsina Binte Alam ◽  
Magdy Abdelrahman ◽  
Scott A. Schram
Keyword(s):  
Asphalt Pavement ◽  
Base Layer ◽  
Recycled Asphalt Pavement ◽  
Recycled Asphalt

scholarly journals Wood Fly Ash Stabilized Road Base Layers with High Recycled Asphalt Pavement Content

2021 ◽  
Vol 16 (2) ◽  
pp. 1-15
Author(s):  
Peteris Skels ◽  
Viktors Haritonovs ◽  
Edvards Pavlovskis
Keyword(s):  
Fly Ash ◽  
Asphalt Pavement ◽  
Pilot Project ◽  
Base Layer ◽  
Freezing And Thawing ◽  
Recycled Asphalt Pavement ◽  
Recycled Asphalt ◽  
Road Base ◽  
Proctor Test ◽  
Pavement Base

Wood fly ash stabilised road base layers with high recycled asphalt pavements content was studied both at the laboratory and in-situ. The original recipe was chosen based on an actual stabilised pavement base layer design with cement CEM II/B-T 42.5R but optimised using wood fly ash. The existing road base layer from gravel was mixed with dolomite aggregate and recycled asphalt pavement, adding cement and wood fly ash at different proportions. The mixture was compacted at optimal water content according to the Standard Proctor test and further conditioned. Resistance to freezing and thawing of hydraulically bound mixtures was checked after 28 days of conditioning. Even 50 cycles of freezing and thawing were used. Test results indicated wood fly ash as an effective alternative to the typically used cement for road base stabilisation, including recycled asphalt pavement material. Three hydraulically bound mixtures were chosen for test sections in the pilot project. The project includes five different sections with three different hydraulic binder recipes. The performance of each section was evaluated.

Louisiana Experience with Foamed Recycled Asphalt Pavement Base Materials

2003 ◽  
Vol 1832 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Louay N. Mohammad ◽  
Murad Y. Abu-Farsakh ◽  
Zhong Wu ◽  
Chris Abadie
Keyword(s):  
Asphalt Pavement ◽  
Construction Materials ◽  
Field Tests ◽  
Field Evaluation ◽  
Concrete Pavement ◽  
Recycled Asphalt Pavement ◽  
Recycled Asphalt ◽  
Base Course Material ◽  
Experimental Base ◽  
Base Course

Utilization of existing recyclable materials has always been key to more efficient and economical highway construction. Use of the foamed-asphalt (FA) technique to stabilize recycled asphalt pavement (RAP) is one strategy for an efficient use of salvaged construction materials. The main objective of this study is to investigate the potential use of FA-treated RAP as a base course material in lieu of a crushed-limestone base beneath a concrete pavement layer. Test sections were constructed at US-190 near Baton Rouge, Louisiana, and used for field evaluation of the FA RAP base. The laboratory mixture design of the FA RAP, the construction of the experimental base section, and the field evaluation of the stiffness of the FA RAP base layers using different in situ testing devices are presented. Preliminary results of both laboratory and field tests showed that the FA-treated RAP mixtures are very promising and can be used as an alternative to the traditional limestone base beneath a concrete pavement layer.

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