scholarly journals Effect of Aging and Moisture Damage on Fatigue Cracking Properties in Asphalt Mixtures

2021 ◽  
Vol 11 (22) ◽  
pp. 10543
Author(s):  
Sung Lin Yang ◽  
Cheolmin Baek ◽  
Hee Beom Park
Keyword(s):  
Service Life ◽  
South Korea ◽  
Material Properties ◽  
Fatigue Cracking ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Heavy Vehicles ◽  
Road Pavement ◽  
Damage And Fracture

Recently, damage to asphalt pavements in South Korea has increased because of direct and indirect factors caused by abnormal climatic changes, such as torrential rains, prolonged heatwaves in summer, and heavy snowfall in winter. Additionally, the use of medium and heavy vehicles is also a contributing factor. Therefore, an experimental procedure to study the moisture damage and fracture properties of asphalt pavements considering the recent changes in precipitation properties, deterioration of road pavement, and traffic conditions in South Korea was developed in this study. Additionally, changes in material properties according to the indoor aging process and fatigue crack resistance were evaluated for hot mix and warm mix asphalt mixtures of the same grade and different initial production and construction temperatures. To evaluate the effect of aging and moisture damage on fatigue cracking, the experimental coefficient values of the predictive model were calculated for each condition. It was observed that the material properties of hot mix asphalt mixtures changed with an increase in aging and moisture damage. The service life of the pavement was reduced by approximately 40–80% owing to moisture damage, whereas aging had a greater effect on fatigue life as the service life increased.

scholarly journals Hybrid Modification of Stone Mastic Asphalt with Cellulose and Basalt Fiber

2020 ◽  
Vol 2020 ◽  
pp. 1-11
Author(s):  
You Huang ◽  
Zhaohui Liu ◽  
Li Liu ◽  
Yunbao Zhang ◽  
Qingxiang Xu
Keyword(s):  
Material Properties ◽  
Permanent Deformation ◽  
Basalt Fiber ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Control Group ◽  
Damage Resistance ◽  
Mastic Asphalt ◽  
Stone Mastic Asphalt ◽  
Hybrid Modification

In this study, cellulose and basalt fiber were introduced simultaneously to stone mastic asphalt (SMA) to investigate the effects of hybrid modification on performance improvement of asphalt mixture. The study consists of three parts. The first part investigated material properties of cellulose and basalt fiber, including microscope electrical scanning. The second part conducted a series of tests to evaluate the effects of different combinations of cellulose and basalt fiber on performance. With a total addition of fiber 0.4% by the weight of mixture, five different cellulose-basalt fiber ratios, 0 : 4, 1 : 3, 2 : 2, 3 : 1, and 4 : 0, were introduced to the asphalt mixtures. A series of tests including draindown, permanent deformation, low temperature bending, beam fatigue, and moisture damage resistance were conducted. In the final part, a benefit-cost ratio was designed to help determine the optimum cellulose-basalt fiber combination in the economic aspect. Results show that material properties of the two fibers are very different, including thermostability, modulus, surface, and microstructure, especially oil absorption. In general, all samples with fibers outperformed the control group in all the performance tests. Specifically, cellulose fiber improved draindown, ductility, and fatigue more significantly, whilst basalt fiber has more influence on improving permanent deformation, deflection strength, and stress sensitivity. Equal portion of cellulose and basalt fiber has the best moisture damage resistance. The mechanisms of the two fibers are different, resulting in different performance improvements on asphalt mixtures. Overall, an appropriate combination of the two fibers would produce paving materials with more balanced performance in an economical way.

Evaluation of select warm mix additives with polymer and rubber modified asphalt mixtures

2015 ◽  
Vol 42 (6) ◽  
pp. 377-388 ◽  
Author(s):  
Zahi Chamoun ◽  
Mena I. Souliman ◽  
Elie Y. Hajj ◽  
Peter Sebaaly
Keyword(s):  
Fatigue Testing ◽  
Research Effort ◽  
Fatigue Cracking ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Asphalt Binders ◽  
Experimental Program ◽  
Modified Asphalt ◽  
Warm Mix Additives ◽  
The Impact

Warm mix technologies are being increasingly investigated in an effort to conserve energy, reduce emissions, and extend paving season. Most of the laboratory research conducted to date on warm mix technologies has been concentrated on studying the impact of warm mix technologies on unmodified asphalt binders. This research effort evaluates the use of select warm mix additives with unmodified, polymer-modified, and terminal blend tire rubber asphalt mixtures from Nevada and California. The study evaluated two different warm mix asphalt (WMA) technologies: Sasobit and Advera. The experimental program evaluated the resistance to moisture damage and rutting of different mixtures with and without liquid anti-strip and lime. Additionally, fatigue resistance of modified and unmodified asphalt mixtures without anti-strip was conducted. In this research effort, the unmodified WMA mixtures were able to achieve mixing temperature reductions of 26.7 to 29.4 °C while the modified WMA mixtures were able to achieve mixing temperature reductions of 16.7 to 25.0 °C compared to their corresponding HMA control mixtures. The results showed that the use of modified binders with WMA technologies and anti-strip additives can result in mixtures with a better resistance to moisture damage compared to unmodified mixtures. Additionally, the combination of modified asphalt binders with lime will eventually generate better resisting mixtures to permanent deformation. Moreover, the resistance to fatigue cracking of HMA and WMA mixtures was also enhanced using modified asphalt binders. Furthermore, a mechanistic fatigue analysis using 3D-Move software confirmed the outcomes of fatigue testing.

scholarly journals Study on the Influential Factors of Noise Characteristics in Dense-Graded Asphalt Mixtures and Field Asphalt Pavements

2018 ◽  
Vol 2018 ◽  
pp. 1-13 ◽  
Author(s):  
Zhaoyang Guo ◽  
Junyan Yi ◽  
Sainan Xie ◽  
Jianpeng Chu ◽  
Decheng Feng
Keyword(s):  
Service Life ◽  
Aggregate Size ◽  
Low Noise ◽  
Influential Factors ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Maximum Aggregate Size ◽  
Noise Characteristics ◽  
Air Void ◽  
Pavement Noise

Determining the influential factors of noise characteristics in dense-graded asphalt mixtures and field asphalt pavement is important in constructing highways that are both low noise and environmentally friendly. In this study, the effects of nominal maximum aggregate size, asphalt binder type, air void percentage, and the service life of pavement on the noise absorption characteristics of asphalt mixtures were first investigated in laboratory. Thereafter, tire/pavement noise measurements were conducted on different types of dense-graded asphalt pavements. The effects of the service lives of the pavements, the types of the pavements, driving speeds, and test temperatures on the noise levels of the pavements were also studied. The Zwicker method is used to calculate psychoacoustic parameters on the tire/pavement noise spectrum. The laboratory results indicate that reducing the nominal maximum aggregate size, using rubber asphalt, and increasing air void percentage as well as surface texture depth improve the sound absorption performance of asphalt mixtures. The field measurements show that laying down asphalt pavements with a shorter service life or larger texture depth, using rubber asphalt, reducing traffic speed, and increasing air temperature can reduce noise.

scholarly journals Characterization of the Adhesive and Cohesive Moisture Damage for Asphalt Concrete

2019 ◽  
Author(s):  
Mona Nobakht
Keyword(s):  
Asphalt Concrete ◽  
Asphalt Binder ◽  
Damage Model ◽  
Moisture Diffusion ◽  
Adhesive Bond ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Dynamic Modulus Test ◽  
Early Degradation

Durability of asphalt concrete is significantly influenced by moisture damage, resulting in early degradation of asphalt pavements. There are several tests and conditioning methods adopted by agencies and researchers to identify the susceptibility of asphalt mixtures to the moisture damage. However, there is a need to develop predictive models that account for the impacts of moisture on fundamental mechanistic properties of asphalt concrete. In this regard, the focus of this paper is to develop an adhesive and a cohesive moisture damage model that enable the prediction of the amount of induced damages due to the moisture diffusion in the asphalt concrete. The models are developed based on intermolecular bond energy/force, and the mechanisms of cohesive and adhesive failures. They assume water vapor diffusion as the dominant moisture transport mode in asphalt pavements. The models are calibrated and validated by conducting dynamic modulus test on Fine Asphalt Matrix mixtures as well as Bitumen Bond Strength test on the adhesive bond between aggregate and asphalt binder. The results of validation process show the competence of the proposed models in predicting the adhesive and cohesive moisture damage of asphalt mixtures.

Investigation of Surrogate Performance Related Tests for Fatigue Cracking of Asphalt Pavements

2021 ◽  
pp. 036119812110101
Author(s):  
Liya Jiao ◽  
John T. Harvey ◽  
Mohamed Elkashef ◽  
Yanlong Liang ◽  
David Jones
Keyword(s):  
Fatigue Life ◽  
Linear Regression Analysis ◽  
Fatigue Cracking ◽  
Asphalt Mixtures ◽  
Fatigue Performance ◽  
Bending Test ◽  
Asphalt Pavements ◽  
Index Test ◽  
Fracture Parameter ◽  
Fracture Parameters

This paper studies the relationship between laboratory measurements of fatigue performance and fracture performance of conventional asphalt mixtures, asphalt mixtures with reclaimed asphalt pavement (RAP), and rubberized asphalt mixtures. The existing four-point bending (4PB) test was developed to evaluate the fatigue performance of asphalt pavements; however, it is not necessarily appropriate for use in routine job mix formula approval and is too slow and expensive for quality control/quality assurance (QC/QA). In this paper, the semi-circular bending test and indirect tensile asphalt cracking test (IDEAL-CT) were evaluated for their potential to serve as a simple and fast surrogate fatigue performance related test for QC/QA on routine projects and routine mix design. Multiple representative fracture parameters were obtained from the Illinois flexibility index test and the IDEAL-CT. The coefficient of variation revealed that the lowest variability from both tests was in fracture strength. In addition, the linear regression analysis between fracture parameters and fatigue performance indicated that slopes, fracture toughness, and strength from fracture tests have good correlations with the initial flexural stiffness from 4PB tests, while 4PB initial stiffness is well correlated with fatigue life. The direct correlation between fracture properties and fatigue life was not as good. The fracture parameter “strength” also showed the capability of discriminating among asphalt materials with low RAP content.

scholarly journals High-Performance Sustainable Asphalt Mixtures for High-Volume Traffic Roads in Severe Climates

2020 ◽  
Vol 12 (21) ◽  
pp. 8765
Author(s):  
Fernando Moreno-Navarro ◽  
Francisco Javier Sierra ◽  
Miguel Sol-Sánchez ◽  
M. Carmen Rubio-Gámez ◽  
Manuel Castillo ◽  
...  
Keyword(s):  
Environmental Conditions ◽  
High Performance ◽  
High Volume ◽  
Crumb Rubber ◽  
Asphalt Mixtures ◽  
Asphalt Pavements ◽  
Mechanical Resistance ◽  
Heavy Vehicles ◽  
Bituminous Materials ◽  
Traffic Volumes

This paper summarizes the work carried out in a research project whose main objective was to develop high-performance sustainable bituminous materials (using crumb rubber and additives to reduce their manufacturing temperature) to be used in roads that support high traffic volumes and/or severe environmental conditions. For this purpose, various studies were conducted both in a laboratory and in a real asphalt plant (at binder and mixture level). Later, these materials were used to construct a trial section in a highway at a mountain pass (at more than 1400 m above sea level) supporting more than 2600 heavy vehicles each day under severe environmental conditions (snow during winter, and high temperatures and many hours of solar radiation during the summer). The results indicate the viability of using these materials, since they provide a number of advantages such as improved workability at lower temperatures and an increase in the mechanical resistance against the main sources of distress that affect asphalt pavements.

scholarly journals Performance Evaluation of WMA Containing Re-Refined Acidic Sludge and Amorphous Poly Alpha Olefin (APAO)

2021 ◽  
Vol 13 (6) ◽  
pp. 3315
Author(s):  
Mansour Fakhri ◽  
Danial Arzjani ◽  
Pooyan Ayar ◽  
Maede Mottaghi ◽  
Nima Arzjani
Keyword(s):  
Resilient Modulus ◽  
Permanent Deformation ◽  
Road Construction ◽  
Moisture Damage ◽  
Asphalt Mixtures ◽  
Modified Bitumen ◽  
Alternative Source ◽  
The Road ◽  
Marshall Test ◽  
Alpha Olefin

The use of waste materials has been increasingly conceived as a sustainable alternative to conventional materials in the road construction industry, as concerns have arisen from the uncontrolled exploitation of natural resources in recent years. Re-refined acidic sludge (RAS) obtained from a waste material—acidic sludge—is an alternative source for bitumen. This study’s primary purpose is to evaluate the resistance of warm mix asphalt (WMA) mixtures containing RAS and a polymeric additive against moisture damage and rutting. The modified bitumen studied in this research is a mixture of virgin bitumen 60/70, RAS (10, 20, and 30%), and amorphous poly alpha olefin (APAO) polymer. To this end, Marshall test, moisture susceptibility tests (i.e., tensile strength ratio (TSR), residual Marshall, and Texas boiling water), resilient modulus, and rutting assessment tests (i.e., dynamic creep, Marshall quotient, and Kim) were carried out. The results showed superior values for modified mixtures compared to the control mix considering the Marshall test. Moreover, the probability of a reduction in mixes’ moisture damage was proved by moisture sensitivity tests. The results showed that modified mixtures could improve asphalt mixtures’ permanent deformation resistance and its resilience modulus. Asphalt mixtures containing 20% RAS (substitute for bitumen) showed a better performance in all the experiments among the samples tested.

AN OVERVIEW OF MOISTURE DAMAGE PERFORMANCE TESTS ON ASPHALT MIXTURES

2016 ◽  
Vol 78 (7-2) ◽  
Author(s):  
Fauzan Mohd Jakarni ◽  
Muhammad Fudhail Rosli ◽  
Nur Izzi Md Yusoff ◽  
Md Maniruzzaman A Aziz ◽  
Ratnasamy Muniandy ◽  
...  
Keyword(s):  
Moisture Damage ◽  
Test Methods ◽  
Asphalt Mixtures ◽  
Performance Tests ◽  
Cohesive Failure ◽  
Modified Bitumen ◽  
Traffic Loading ◽  
Construction Methods ◽  
Evaluation Phase ◽  
Two Phases

This paper presents a review of moisture damage performance tests on asphalt mixtures. The moisture damage remains to be a detriment to the durability of the Hot Mix Asphalt (HMA) pavement. Moisture damage can be defined in forms of adhesive failure between bitumen and aggregates and cohesive failure within bitumen. Aggregate mineralogy, bitumen characteristics and anti-stripping additive dominantly influence the performance of asphalt mixtures towards moisture damage alongside construction methods, climate and traffic loading. Various laboratory test methods have been developed to quantify the moisture damage performance of asphalt mixtures by resembles the action in the field, including qualitative test such as Boiling Water Test (ASTM D3625) and quantitative tests such as Modified Lottman Test (AASHTO T283). Both of these tests consist of two phases, which are conditioning and evaluation phase. This paper will review the effectiveness of the selected available tests based on various asphalt mixtures materials. Generally, this study indicates that asphalt mixtures consisted of limestone aggregates, modified bitumen and addition of anti-stripping additives will provide more resistant towards moisture damage. 

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