Empirical correlation of the Modified Wheel Tracker (MWT) and the dynamic creep test for evaluating the permanent deformation of HMA

2021 ◽  
Author(s):  
Abhirup Basu Roy-Chowdhury ◽  
Mofreh Saleh ◽  
Miguel Moyers Gonzalez
Keyword(s):  
Creep Test ◽  
Permanent Deformation ◽  
Flow Number ◽  
Laboratory Characterization ◽  
Dynamic Creep ◽  
Tracking Direction ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Relationship Of

The Wheel Tracking Test (WTT) has been extensively used for laboratory characterization of permanent deformation of Hot Mix Asphalt (HMA). However, the fully-confined setup of the device is unable to capture the tertiary zone where shear deformation takes place. This makes the permanent deformation resistance characteristics of HMA difficult to analyze. Hence, a modified wheel tracker (MWT), with unconfined lateral sides along the wheel tracking direction was utilized in this study, which can capture the tertiary flow [referred to as the Flow Number (FN)]. The dynamic creep test, which yields FN, is a common laboratory test which has the ability to characterize permanent deformation considering the shear behavior. The study investigated the relationship of the MWT and the dynamic creep test utilizing the permanent deformation and permanent micro-strain data from the respective tests. A novel parameter, FN-Index was explored. The permanent deformation parameters derived from the MWT were well correlated with the dynamic creep test. The MWT showed promising repeatability for the FNs.

Evaluation of Permanent Deformation of BRA Modified Asphalt Paving Mixtures Based on Dynamic Creep Test Analysis

2016 ◽  
Vol 16 ◽  
pp. 69-81 ◽  
Author(s):  
Muhammad Karami ◽  
Ainalem Nega ◽  
Ahdyeh Mosadegh ◽  
Hamid Nikraz
Keyword(s):  
Creep Test ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Modified Asphalt ◽  
Nominal Size ◽  
Dynamic Creep ◽  
Asphalt Paving ◽  
Modified Binder

The main objective this study is to evaluate the permanent deformation of buton rock asphalt (BRA) modified asphalt paving mixtures using dynamic creep test so that long term deformation behavior of asphalt mixtures can be characterized. The dynamic creep test was conducted on unmodified and BRA modified asphalt mixture using UTM25 machine. Asphalt cement of C170 from a regional supplier in Western Australia was used as the base asphalt binder for unmodified asphalt mixture; and BRA modified asphalt mixtures were made by substituting the base asphalt with 10, 20, and 30% (by weight of total asphalt binder) natural binder continuing granular BRA modified binder. The granular (pellets) BRA modified binder with a diameter of 7-10 mm was produced and extracted according the Australia Standard. Crushed granite was taken from a local quarry of the region; and dense graded for both unmodified and BRA modified asphalt mixture with the nominal size of 10 mm was used. The results of this analysis showed that BRA modified had a good performance as compared with unmodified asphalt mixtures, and increase in the content modified binder to 10%, 20%, and 30% resulted in decrease of the total permanent strain.

scholarly journals Evaluation of Permanent Deformation of Unmodified and Rubber-Reinforced SMA Asphalt Mixtures Using Dynamic Creep Test

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Herda Yati Katman ◽  
Mohd Rasdan Ibrahim ◽  
Mohamed Rehan Karim ◽  
Nuha Salim Mashaan ◽  
Suhana Koting
Keyword(s):  
Creep Test ◽  
Creep Behaviour ◽  
Permanent Deformation ◽  
High Stress ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Creep Model ◽  
Deformation Parameters ◽  
Dynamic Creep ◽  
C 50

This paper presents the evaluation of permanent deformation of rubber-reinforced SMA asphalt mixtures by using dynamic creep test. The effect of trans-polyoctenamer as a cross-linking agent in permanent deformation of rubberized mixtures was also evaluated. Dynamic creep test was conducted at different stress levels (200 kPa, 400 kPa) and temperatures (40°C, 50°C). Permanent deformation parameters such as dynamic creep curve, ultimate strain, and creep strain slope (CSS) were used to analyse the results. Finally, the creep behaviour of the specimens was estimated by the Zhou three-stage creep model. The results show that crumb rubber and trans-polyoctenamer significantly affected the parameters especially at high stress and temperatures. Consistent findings were observed for all permanent deformation parameters. Moreover, based on Zhou model, it was concluded that resistance to permanent deformation was improved by application of crumb rubber and trans-polyoctenamer.

Evaluation of rheological behavior and performance to permanent deformation of nanomodified asphalt mixtures with carbon nanotubes

2016 ◽  
Vol 43 (5) ◽  
pp. 472-479 ◽  
Author(s):  
João Victor Staub de Melo ◽  
Glicério Trichês
Keyword(s):  
Carbon Nanotubes ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Accelerated Degradation ◽  
Wheel Tracking Test ◽  
And Performance ◽  
Wheel Tracking ◽  
Reference Mixture

Rutting is one of the most important issues associated with asphalt pavements. This defect leads to the accelerated degradation of the pavement and considerably reduces the level of road safety. This paper reports on the results obtained in the optimization of nanocomposite asphalt containing carbon nanotubes (CNTs) with regard to the resistance to permanent deformation. Nanocomposite asphalts were prepared with the addition of different proportions of CNTs. Based on a study on the empirical and rheological properties of the nanocomposites developed, optimization of the CNT content incorporated into the conventional asphalt binder was carried out. Then two asphalt mixtures were investigated, a reference mixture and a nanomodified mixture with CNTs (optimal content). The rheological evaluations were carried out on four-point fatigue equipment and the resistance to permanent deformation was tested in a traffic simulator (wheel tracking test). The results demonstrate the efficient contribution of the nanocomposite to the resistance to permanent deformation.

scholarly journals Deformasi Permanen dan Modulus Resilien Campuran AC-BC Modified Menggunakan Aspal Multigrade

2019 ◽  
Vol 7 (2) ◽  
pp. 60-68
Author(s):  
Desy Yofianti
Keyword(s):  
Climate Change ◽  
High Pressure ◽  
Asphalt Concrete ◽  
Resilient Modulus ◽  
Permanent Deformation ◽  
Asphalt Mixture ◽  
Flexible Pavement ◽  
Traffic Load ◽  
Wheel Tracking Test ◽  
Wheel Tracking

Multigrade asphalt use is an alternative method for handling road deterioration problem, e.g. a rutting, due to the repetitive traffic load and high pressure from vehicle wheels. In addition, the multigrade asphalt has been widely used to reduce temperature sensitivity of the asphalt mixture in flexible pavement due to an unpredictable climate change. Rutting is also caused by the accumulation of permanent deformations from all layers in the pavement structure. This study aims to analyze the permanent deformation value and the resilient modulus of an Asphalt Concrete Binder Course (AC-BC) modified mixture through the use of multigrade asphalt. The Wheel Tracking Test and UMATTA Test were used to test the specimens. The Tests on samples were carried out at temperatures of 35oC and 50oC. The results showed that the permanent deformation value of the AC-BC with multigrade asphalt had a better deformation resistance than the 60/70 pen bitumen mixture at 35oC. At the temperature of 50oC, the multigrade asphalt mixture had a smaller permanent deformation value (0.92 mm) compared to the 60/70 pen bitumen mixture. At the temperature of 35oC, multigrade asphalt mixture had a resilient modulus value of 1.04 times greater than the 60/70 pen bitumen mixture and at the temperature of 50oC, this mixture had a resilient modulus value of 1.16 times greater than the 60/70 pen bitumen mixture. Therefore, this study concluded that the increase/decrease of value of permanent deformation and resilient modulus were influenced by the temperature and types of asphalt in the mixture.

scholarly journals CALCULATION OF PAVEMENT PERMANENT DEFORMATION USING PERZYNA’S ELASTO-VISCOPLASTIC MODEL

2016 ◽  
Vol 54 (1) ◽  
pp. 150
Author(s):  
Nguyen Huynh Tan Tai
Keyword(s):  
Permanent Deformation ◽  
Model Parameters ◽  
Nonlinear Finite Element Method ◽  
Viscoplastic Material ◽  
Traffic Loading ◽  
Concrete Layer ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Method Model ◽  
Test Result

In this work, a method for calculation of pavement permanent deformation due to traffic loading is presented. The mechanics behavior of asphalt concrete layer is considered as Perzyna’s elasto-viscoplastic material. The pavement permanent deformation is incrementally calculated using nonlinear finite element method. Model parameters are determined using Hamburg Wheel Tracking Test result.

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