scholarly journals Movement Characteristics of Aggregates in Asphalt Mixtures during the Wheel Tracking Test

2003 ◽  
Vol 46 (3) ◽  
pp. 172-180 ◽  
Author(s):  
Takashi KONDO ◽  
Akihiro MORIYOSHI ◽  
Takaki YOSHIDA ◽  
Shouichi TAKAHASHI
Keyword(s):  
Asphalt Mixtures ◽  
Movement Characteristics ◽  
Wheel Tracking Test ◽  
Wheel Tracking

Pavement Performance of Hot In-Place Recycling for Waste Asphalt Mixtures

2013 ◽  
Vol 668 ◽  
pp. 292-296
Author(s):  
Ya Li Ye ◽  
Chuan Yi Zhuang ◽  
Jia Bo Hu
Keyword(s):  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Pavement Performance ◽  
Test Results ◽  
Technical Parameters ◽  
Stable Performance ◽  
Wheel Tracking Test ◽  
Asphalt Content ◽  
Wheel Tracking

With the early asphalt pavements have been into the stage of medium maintenance or overhaul, recycling is a very important way for waste asphalt mixtures. A sample was taken in the expressway from Huhhot to Baotou, and the waste mixtures were extracted from field and sieved; so that the new aggregates can be determined and mix design was carried. With the aid of the penetration, the softening point and the viscosity in 135°C test, the quantity of the regenerant and the asphalt content were ascertained. Through the high temperature stable performance, the anti-low temperature performance, the water stability and the Hamburg wheel-tracking test, the appropriate gradation and the optimum asphalt content were determined. The test results showed that the pavement performance of the waste asphalt mixture was enhanced obviously with hot in-place recycling, and it has achieved technical parameters for old asphalt mixture.

Study on Water Stability of Bitumen Mixture Under High Temperature and Moisture Conditions

2011 ◽  
Vol 374-377 ◽  
pp. 1451-1454
Author(s):  
Hong Ying Liu
Keyword(s):  
High Temperature ◽  
Hydrated Lime ◽  
Asphalt Mixtures ◽  
Moisture Susceptibility ◽  
Moisture Condition ◽  
Wheel Tracking Test ◽  
Performance Enhancers ◽  
Moisture Conditions ◽  
Wheel Tracking ◽  
Lime Stone

The Work made use of two different asphalts-Shengli and Kalamayi and two different aggregates-Granite and Lime-stone to study the performance of asphalt mixtures under high temperature and moisture condition. Two modifers AST-3 and hydrated lime were investigated as prospective performance enhancers. Film stripping and marshall’s Retained stability tests were used to determined the adhesion characteristics and Moisture susceptibility of mixture, immersion wheel tracking test was used to study the rutting potential at high temperature in the presence of moisture.

Evaluation on Mix Design and Rutting Resistance of Dry Mixed Rubberised Asphalt Mixtures

2013 ◽  
Vol 65 (3) ◽  
Author(s):  
Norhidayah Abdul Hassan ◽  
Mohd Rosli Hainin ◽  
Haryati Yaacob ◽  
Che Ros Ismail ◽  
Nur Zurairahetty Mohd Yunus
Keyword(s):  
Asphalt Mixture ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Mix Design ◽  
Laboratory Evaluation ◽  
Modified Bitumen ◽  
Dry Process ◽  
Stone Mastic Asphalt ◽  
Wheel Tracking Test ◽  
Wheel Tracking

This study presents a laboratory evaluation on the properties of crumb rubber modified asphalt mixture using a dry process method in which the fine crumb rubber is added to substitute the aggregates portion and acts as elastic aggregates within the mix. The effect of crumb rubber in the mixture was investigated in terms of the volumetric properties using Marshall Mix Design and rutting performance using Wheel Tracking Test. The crumb rubber was added between 1 to 3% in steps of 1% by weight of aggregates to modify a dense graded mix, Asphaltic Concrete (AC14) and a gap graded mix, Stone Mastic Asphalt (SMA14) according to the Malaysian mix design. Based on the result, it was observed that the performance of the asphalt mixtures was significantly affected with the addition of crumb rubber. Rubberised asphalt mixtures for AC14 were found to have a greater resistance on rutting deformation compared to the conventional mixture. However, the use of fine rubber in SMA14 mixture with 80/100 bitumen cannot provide enough binder modification to perform as good as conventional SMA14 mixture with polymer modified bitumen. Furthermore, based on detailed review, a set of procedures for producing dry mixed rubberised asphalt mixture was identified and recommended for future studies.

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 Strain distribution in asphalt mixtures during the wheel tracking test at high temperatures

2013 ◽  
Vol 40 ◽  
pp. 1128-1135 ◽  
Author(s):  
Akihiro Moriyoshi ◽  
Naoyuki Takahashi ◽  
Osamu Ikeda ◽  
Masato Kawashima ◽  
Takahiko Akabane
Keyword(s):  
High Temperatures ◽  
Strain Distribution ◽  
Asphalt Mixtures ◽  
Wheel Tracking Test ◽  
Wheel Tracking

Use of the Hamburg Wheel-Tracking Test to Characterize Asphalt Mixtures in Cool Weather Regions

2017 ◽  
Vol 2633 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Daniel Swiertz ◽  
Cheng Ling ◽  
Pouya Teymourpour ◽  
Hussain Bahia
Keyword(s):  
Test Temperature ◽  
Moisture Damage ◽  
Testing Temperature ◽  
Mixture Design ◽  
Design Tool ◽  
Asphalt Mixtures ◽  
Deformation Resistance ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Hamburg Wheel Tracking

The Hamburg wheel-tracking test (HWTT) has shown promise to predict permanent deformation resistance and moisture damage potential of asphalt mixtures. Several state agencies have implemented the test as a mixture evaluation and design tool. One aspect of the test that remains a topic of research is the testing temperature. Many studies and specifications use 50°C for all testing, but some use a test temperature that depends on the base asphalt used in the mixture. Concern exists about the use of 50°C as the sole test temperature in cooler weather regions, such as Wisconsin, because the asphalts used in such regions tend to be relatively soft (high temperature grades of PG 58 and below). This paper presents findings in support of an effort to apply the HWTT to mixtures in cold climates with the use of three test temperatures and several mixture design variables. The paper presents the effects of the mixture design traffic level, the PG of the binder, and the binder modification level on the deformation resistance, creep slope, stripping slope, and stripping inflection point (SIP). The HWTT was found to be sensitive to the factors evaluated in this study. On the basis of statistical analysis of the test data, logical trends were observed. The testing temperature was found to affect not only the response variables but also the level of significance of controlled factors. The effectiveness of the SIP to characterize the moisture sensitivity of mixtures requires more research to validate the effect of moisture damage on HWTT results.

Determining the Relationship Among Hamburg Wheel-Tracking Test Parameters and Correlation to Field Performance of Asphalt Pavements

2020 ◽  
Vol 2674 (4) ◽  
pp. 281-291 ◽  
Author(s):  
Fan Yin ◽  
Chen Chen ◽  
Randy West ◽  
Amy Epps Martin ◽  
Edith Arambula-Mercado
Keyword(s):  
Field Performance ◽  
Asphalt Mixtures ◽  
Test Results ◽  
Moisture Susceptibility ◽  
Rutting Resistance ◽  
Test Parameters ◽  
Wide Range ◽  
Wheel Tracking Test ◽  
Wheel Tracking ◽  
Hamburg Wheel Tracking

The Hamburg wheel-tracking test (HWTT) is commonly used to evaluate the rutting resistance and moisture susceptibility of asphalt mixtures. Over the years, different test parameters have been proposed, including the traditional ones specified in AASHTO T 324 and several alternatives developed by asphalt researchers. This study was undertaken to refine the HWTT method toward enhancing its implementation as part of balanced mix design specifications for asphalt mixtures. A HWTT database was developed including test results of over 70 mixtures with a wide range of mixture components and production parameters. Data analyses were conducted to examine the relationships among various HWTT parameters, determine their correlations to field performance data, and estimate the within-laboratory repeatability of the test results. Two alternative rutting parameters, rutting resistance index ( RRI) and corrected rut depth ( CRD), were found to be advantageous over the traditional parameters of total rut depth ( TRD) and creep slope ( CS). RRI allows for direct comparison of results with different termination points, and CRD isolates the rut depth resulting from permanent deformation from that caused by stripping. Among all the rutting parameters, RRI had the best correlation to field rut depth, followed by CS, CRD, and TRD. Receiver operating characteristic analysis was conducted to determine the correspondence between HWTT results and pavement field performance related to moisture susceptibility. The analysis identified 9,000 passes as the best criterion for stripping inflection point and 2,000 passes for the alternative moisture susceptibility parameter, stripping number. Finally, the within-laboratory repeatability of HWTT rut depth measurements was determined.

scholarly journals Crack Formation in Asphalt Mixtures in the Wheel Tracking Test at High Temperature

2004 ◽  
Vol 47 (2) ◽  
pp. 90-99 ◽  
Author(s):  
Takashi Kondo ◽  
Akihiro Moriyoshi ◽  
Takaki Yoshida ◽  
Shouichi Takahashi
Keyword(s):  
High Temperature ◽  
Crack Formation ◽  
Asphalt Mixtures ◽  
Wheel Tracking Test ◽  
Wheel Tracking
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