scholarly journals Asphalt Binder Performance Grading for the Republic of Yemen Based on Superpave Asphalt Mix-Design

2020 ◽  
Vol 14 (1) ◽  
pp. 365-379
Author(s):  
Ghassan M. Ali Hussain ◽  
Mohammed A.G. Abdulaziz ◽  
Zheng N. Xiang ◽  
Mohammed A. Al-Hammadi
Keyword(s):  
Prediction Models ◽  
Asphalt Pavement ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Pavement Management ◽  
Temperature Sensitive ◽  
Seasonal Temperature ◽  
Asphalt Mix ◽  
The Republic ◽  
Performance Grading

Background: The asphalt binder is considered a temperature-sensitive viscoelastic material. Temperature can cause some common distress of asphalt pavement, such as rutting (permanent deformation), which correlated with high-temperature environments, and thermal cracking, which correlated with low-temperature environments. Objective: This study aimed to establish asphalt binder Performance Grades (PGs) in the Yemeni region to ensure that the asphalt pavement design can effectively resist the distresses of rutting and cracking that occurred due to seasonal temperature changes. Methods: In order to determine the performance grades, the temperature zoning was performed by obtaining the last 10 years temperature data of 19 cities in Yemen gathered by the Yemeni Meteorological Authority. The collected data were analyzed based on the trend and statistical reliability. Three air-pavement temperature prediction models of Superpave, LTPP, and Oman model were used to predict air pavement temperatures. The local performance grades were computed using reliability levels of 50% and 98%. Since the dependent variables of latitude in the Superpave equation can more reflect the geographical locations of Yemeni regions rather than the other models, this study strongly approved the SHARP Superpave model to be used to determine the performance grades. Results: Based on the Superpave model with reliability analyses, performance grade maps were drawn. The most common performance grades recommended in this study for low traffic volume roads were PG64-10, and PG52-10. Conclusion: The findings of this study are highly significant and provide valuable decision support for pavement management and improve the transportation system in the Republic of Yemen.

scholarly journals Climate Zones of the Asphalt Binder Performance for the Highway Pavement Design

2020 ◽  
Vol 6 (11) ◽  
pp. 2220-2230
Author(s):  
Ghassan Mohammed Ali Hussain ◽  
Mohammed Ahmed Ghaleb Abdulaziz ◽  
Zheng Nan Xiang ◽  
Mohammed A. Al-Hammadi
Keyword(s):  
Temperature Coefficient ◽  
Asphalt Pavement ◽  
Asphalt Binder ◽  
Pavement Management ◽  
Seasonal Temperature ◽  
Climate Zones ◽  
Temperature Changes ◽  
Distribution State ◽  
High And Low Temperatures ◽  
Climatic Zoning

The asphalt pavement is exposed to the natural environment, which is affected by Climate change such as temperature, rain, ultraviolet, and other environmental conditions. This study aimed to establish the asphalt binder performance of Yemen so that the asphalt pavement can be designed to resist the distresses of rutting and cracking that occurred due to seasonal temperature changes and rainfall. The first step of determining the binder performance is to establish high and low temperatures, as well as rainfall because the asphalt binder is a temperature and rainfall sensitive viscoelastic material. To study the climatic zoning of asphalt pavement in Yemen, the data of temperature and rainfall in 19 provinces of Yemen in the past 10 years were collected and comprehensively analyzed, and the variations laws of them were analyzed. According to the Chinese approach, the climatic zoning of Yemen's asphalt pavement was divided. The moisture temperature coefficient was introduced, and its probability distribution state was also analyzed. The standard of the moisture temperature coefficient was suggested and the asphalt pavement climate zones based on the moisture temperature coefficient were determined. The results indicated that the main influencing factors of asphalt pavement in Yemen were the temperature rise and rainfall, and the climate zones of asphalt pavement were divided into different zones such as 1-2-1, 2-2-2, 1-2-2, and 3-1-2. According to the principle of equal probability, the moisture temperature coefficient was found to be 18, and the asphalt pavement climate zoning map was drawn. The findings of this study are highly significant and provide valuable decision support for pavement management and improve the transportation system. Doi: 10.28991/cej-2020-03091613 Full Text: PDF

Superpave Models: Predicting Performance during Design and Construction

1996 ◽  
Vol 1545 (1) ◽  
pp. 105-112
Author(s):  
Gerald A. Huber ◽  
Xishun Zhang ◽  
Robin Fontaine
Keyword(s):  
Prediction Models ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Engineering Properties ◽  
Design System ◽  
Widespread Application ◽  
Premature Failure ◽  
The Impact

The Strategic Highway Research Program (SHRP) spent $50 million researching asphalt binders and asphalt mixtures and provided three main products: an asphalt binder specification, an asphalt mixture specification, and Superpave, an asphalt mixture design system that encompasses both the binder and mixture specification. SHRP researchers have provided tools that promise more robust asphalt mixtures with reduced risk of premature failure. Implementation of the specifications and mix design system will require overcoming several obstacles. Superpave must be demonstrated to be practical and easy to use. The impact of Superpave aggregate requirements on aggregate availability must be determined. The Superpave gyratory compaction procedure has been uniquely defined and then calibrated to traffic volume. The reasonableness of this approach must be tested in widespread application. Perhaps the largest implementation hurdle exists in the performance models. Expensive test equipment is necessary to do the performance-based tests. The performance predictions must be established as reasonable to justify the cost. A highway reconstruction project containing three Superpave Level 1 mix designs is documented including quality control done with the Superpave gyratory compactor. Superpave Level 2 performance-based tests were carried out to predict permanent deformation of the design and the mixture as constructed. The performance-based engineering properties obtained from the tests are evaluated, and the reasonableness of the performance prediction models is discussed.

Temperature Zoning of Libya Desert for Asphalt Mix Design

2014 ◽  
Vol 638-640 ◽  
pp. 1414-1426 ◽  
Author(s):  
Hassan Awadat Salem ◽  
Djordje Uzelac ◽  
Bojan Matic
Keyword(s):  
Prediction Models ◽  
Asphalt Binder ◽  
Mix Design ◽  
Empirical Measure ◽  
Significant Difference ◽  
Modified Asphalt Binder ◽  
Asphalt Mix ◽  
Project Location ◽  
Libyan Desert ◽  
Temperature Zoning

The current asphalt binder specifications in Libya are based on the Penetration Grade: penetration test is performed at 25°C. Penetration is an empirical measure of the consistency that is used as an empirical indicator of the rutting and fatigue susceptibility of asphalt binder, and is not related to pavement performance. The new mix design methodology developed under the Strategic Highway Research Program (SHRP), called the SUPERPAVE is a performance-based approach. The first step in the implementation of SUPERPAVE methodology is to establish high and low pavement temperatures for a location. The temperatures define the required Performance Grade (PG) of asphalt binder. This paper documents the initial ground work towards implementation of SUPERPAVE mix design for establishing high and low geographical temperature zones. The temperature zoning of Libya was carried out by using temperature data obtained from 8 weather stations. The SHRP and LTPP prediction models were utilized for predicting pavement temperatures. A significant difference was observed between the predicted pavement temperatures from both the models. The SHRP model gives higher, high temperature PG grade providing additional protection against rutting. Since rutting is the most common distress on flexible pavements in Libya , the SHRP models at 50% level of reliability is recommended. The PG of roads that located in Libyan desert are classified to three zones (PG70-10, PG76-10 and PG82-10.PG 76-10 binder seems to be the most common grade that encompasses more than 70% area of Libya desert .However, currently none of the two local refineries produce the bitumen under penetration grade 60-70,that grade equivalent to PG 82-10 binder, thus it should be a concern for highway or the project location. The polymer modified asphalt binder are not produced by Libya refineries.

Investigating the performance of Superpave through the mechanistic–empirical (M-E) approach, field-evaluated performance, and laboratory test results: a case study on Ontario highways

2020 ◽  
Vol 47 (8) ◽  
pp. 954-961
Author(s):  
Gulfam E. Jannat ◽  
Sina Varamini ◽  
Susan L. Tighe
Keyword(s):  
Permanent Deformation ◽  
Asphalt Binder ◽  
Pavement Management ◽  
Test Results ◽  
International Roughness Index ◽  
Pavement Management System ◽  
Evaluation Of Performance ◽  
Laboratory Test Results ◽  
Analysis System

In North America, highway agencies have started using Superpave as it incorporates a performance-based asphalt binder specification and a mix design analysis system. However, in a pavement management system (PMS), the performance of the pavement structure significantly influences management decisions. In this regard, accurate prediction and evaluation of performance is a very important aspect. With this in mind, this study investigates the performance of Superpave through the mechanistic–empirical (M-E) approach, field-evaluated performance, and laboratory performance tests. It considers 15 sections of highways from Ontario. The investigation found that the international roughness index (IRI) and permanent deformation are overpredicted in the M-E approach compared with field observations. Additionally, to better understand the performance, the dynamic modulus of asphalt mixtures and binder rheological testing are also performed. The master curve developed for the surface mixtures suggests a lower level of fatigue resistance that justifies the bottom-up fatigue failure in the field-observed scenarios.

scholarly journals RESILIENT BEHAVIOUR OF HOT MIXED AND CRACK SEALED ASPHALT CONCRETE UNDER REPEATED LOADING

2007 ◽  
Vol 13 (1) ◽  
pp. 56-60 ◽  
Author(s):  
Hassan Ziari ◽  
Mahmud Ameri ◽  
Mohammad Mahdi Khabiri
Keyword(s):  
Asphalt Concrete ◽  
Hot Mix Asphalt ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Mix Design ◽  
Repeated Loading ◽  
Test Procedures ◽  
The Road ◽  
Asphalt Mix ◽  
Practical Information

Bituminous mixes are becoming increasingly important in the road industry. The road engineers identify rutting as a major source of distress in Hot Mix Asphalt (HMA) pavements. The Asphalt Mix Design Marshal method adequately addresses the aggregate and asphalt binder properties that contribute to permanent deformation. However, there is no laboratory test currently at hand to quickly predict permanent deformation susceptibility of HMA. The main purpose of this paper is to provide practical information of laboratory samples for practitioners and mix designers. Thus, relevant test procedures and results of tests conducted are reported in this paper. Two resilient behaviours of cracked sealed asphalt concrete were studied by varying temperature and time of loading to understand the crack sealed pavement behaviour under Iran conditions.

scholarly journals Performance Characteristics of Fiber Modified Asphalt Concrete Mixes

2014 ◽  
Vol 15 (1) ◽  
pp. 38-50 ◽  
Author(s):  
Manoj Shukla ◽  
Devesh Tiwari ◽  
K. Sitaramanjaneyulu
Keyword(s):  
Tensile Strength ◽  
Asphalt Concrete ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Material Strength ◽  
Test Results ◽  
Modified Asphalt ◽  
Asphalt Mix ◽  
Indirect Tensile ◽  
Fatigue Characteristics

ABSTRACT Asphalt binder modification is one of the approaches taken to improve pavement performance. In addition it may also be improved through the addition of fibers to Asphalt mix that enhances material strength and fatigue characteristics while adding ductility. Due to their inherent compatibility with Asphalt concrete and excellent mechanical properties, fibers offer an excellent potential for modification of Asphalt concrete mix. To investigate the behavior of Fiber Modified Asphalt Concrete Mixes (FMACM), a preliminary study has been done to determine the feasibility of modifying the behavior of a Asphalt Concrete (AC) mixture through the use of Glass fiber and Polyester fiber. The purpose of this study was to identify and understand the factor that is responsible for improving the behavior of FMACM. Asphalt concrete samples were prepared and tested in the laboratory to evaluate the various mixture characteristics. The conclusions drawn from the study on testing of fiber-modified mixes are that fiber modified Asphalt mixtures have shown increased stiffness and resistance to permanent deformation. Fatigue characteristics of the mixtures were also improved. Fibers used in the study were of high tensile strength therefore test results of FMACM have shown higher indirect tensile strength and improved skid resistance for paving applications.

Laboratory Study on the Effect of Asphalt Emulsion as a Rejuvenator in Aged Asphalt Pavement

2012 ◽  
Vol 587 ◽  
pp. 57-61
Author(s):  
Rashid Tanzadeh ◽  
Mahyar Arabani
Keyword(s):  
Asphalt Pavement ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Laboratory Research ◽  
Asphalt Emulsion ◽  
Aged Asphalt ◽  
Repeated Load ◽  
Penetration Tests

Modification of the asphalt binder is one approach taken to improve aged pavement performance. To make the most of maintenance budgets, many agencies have resorted to the use of asphalt rejuvenators as an alternative to revive aging and brittle asphalt pavements. The purpose of this study is laboratory research on the effect of asphalt emulsion in restoring the original properties of aged asphalt pavement. For this purpose, the repeated load axial test is carried out on conventional asphalt samples and aged asphalt samples containing rejuvenator agents in different stress and rejuvenator percentage. Bitumen aged with RTFO according to ASTM-D2872 and the optimum bitumen of 5.5% were considered. The softening point and penetration tests, to examine the effect of rejuvenator in asphalt mixtures modification, On the basic, aged and modified aged bitumen were performed. The results represent that asphalt emulsion as a rejuvenator material in aged asphalt samples because of suitable performance improve aged asphalt permanent deformation resistance and aged bitumen Rheological property.

scholarly journals Asphalt binder performance grading of North Korea for Superpave asphalt mix-design

2018 ◽  
Vol 11 (6) ◽  
pp. 647-654 ◽  
Author(s):  
Jong-Sub Lee ◽  
Jin-Hwan Kim ◽  
Oh-Sun Kwon ◽  
Byung-Duk Lee
Keyword(s):  
North Korea ◽  
Asphalt Binder ◽  
Mix Design ◽  
Asphalt Mix ◽  
Performance Grading

scholarly journals Providing Laboratory Rutting Models for Modified Asphalt Mixes with Different Waste Materials

2017 ◽  
Author(s):  
Ali Reza Azarhoosh ◽  
Gholam Hossein Hamedi ◽  
Hossein Fallahi Abandansari
Keyword(s):  
Prediction Models ◽  
Asphalt Pavement ◽  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Production Costs ◽  
Waste Materials ◽  
Creep Tests ◽  
Pavement Materials ◽  
Dynamic Creep ◽  
Artificial Neural Network Ann

Due to the complex behavior of asphalt pavement materials under various loading conditions, pavement structure, and environmental conditions, accurately predicting the permanent deformation of asphalt pavement is difficult. This study discusses the application of artificial neural network (ANN) and the multiple linear regression (MLR) in predicting permanent deformation of asphalt concrete mixtures modified by waste materials (waste plastic bottles and waste high-density polyethylene). The use of waste materials in the pavement industry can prevent the accumulation of waste material and environmental pollution and can reduce primary production costs. The results of a laboratory study evaluating the rutting properties of Hot-Mix Asphalt (HMA) mixtures using dynamic creep tests were investigated. The results indicate ANN techniques are more effective in predicting the rutting of the modified mixtures tested in this study than the traditional statistical-based prediction models. On the other hand, results show that an increase in percentage of waste materials is very effective in reducing the final strain of asphalt mixtures. However, an increase in percentage of additives over 7% does not help to reduce permanent deformation under dynamic loading in the asphalt mixtures.

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