Investigation on Rutting Performance of Gap-Graded Asphalt Mixtures: Study on Aggregate Gradation

2019 ◽  
pp. 781-791
Author(s):  
Veena Venudharan ◽  
Krishna Prapoorna Biligiri
Keyword(s):  
Asphalt Mixtures ◽  
Aggregate Gradation

Influence of Aggregate Gradation on the Permanent Deformation of Asphalt Mixtures

2021 ◽  
pp. 1063-1069
Author(s):  
Bernardita Lira ◽  
Robert Lundström ◽  
Jonas Ekblad
Keyword(s):  
Permanent Deformation ◽  
Asphalt Mixtures ◽  
Aggregate Gradation

LABORATORY EVALUATION ON THE EFFECT OF CLOGGING ON PERMEABILITY OF POROUS ASPHALT MIXTURES

2015 ◽  
Vol 76 (14) ◽  
Author(s):  
Norhidayah Abdul Hassan ◽  
Nor Asniza Mohamed Abdullah ◽  
Nurul Athma Mohd Shukry ◽  
Mohd Zul Hanif Mahmud ◽  
Nur Zurairahetty Mohd Yunus ◽  
...  
Keyword(s):  
Asphalt Mixture ◽  
Residential Area ◽  
Liquid Limit ◽  
Asphalt Mixtures ◽  
Public Works ◽  
Storm Water ◽  
Laboratory Evaluation ◽  
Aggregate Gradation ◽  
Porous Asphalt ◽  
The One

Porous asphalt mixture is one of the alternative solutions to increase pervious surface area due to urbanization. The uniqueness of porous asphalt surface textures and internal structures allows the mixture to become a temporary storm-water retention and capable to channel excessive storm water. However, one of the major problems that affect the performance of porous asphalt mixtures is the clogging. Therefore, this study aims to determine the effect of clogging towards the permeability of porous asphalt. A total of 30 gyratory compacted samples were fabricated according to aggregate gradation recommended by Malaysia Public Works Department. The clogging materials were collected from two different location, residential area and major highway. The composition and characteristics of the clogging materials were investigated using Plastic Limit, Liquid Limit and Scanning Electron Microscope (SEM). The permeability test was conducted to investigate the permeability rate of the compacted samples based on different clogging material types, clogging concentrations and clogging cycles. In addition, the compacted samples were scanned using X-ray Computed Tomography to obtain the air voids distribution throughout the samples for comparison. It was found that higher concentration of clogging materials and clogging cycles reduced the rate of permeability. Clogging material collected from residential area has higher tendency to clog the void spaces compared to the one obtained from highway.

Composite Dielectric Model of Asphalt Mixtures Considering Mineral Aggregate Gradation

2019 ◽  
Vol 31 (6) ◽  
pp. 04019091 ◽  
Author(s):  
Yingying Zhai ◽  
Bei Zhang ◽  
Fuming Wang ◽  
Yanhui Zhong ◽  
Xiaolong Li
Keyword(s):  
Asphalt Mixtures ◽  
Aggregate Gradation ◽  
Mineral Aggregate ◽  
Dielectric Model

Laboratory Investigate of the Effect of Fine Aggregates on Asphalt Mixture Materials

2011 ◽  
Vol 225-226 ◽  
pp. 577-580
Author(s):  
Yong Ye ◽  
Yi Zhou Cai
Keyword(s):  
Compressive Strength ◽  
Asphalt Mixture ◽  
Aggregate Size ◽  
Asphalt Mixtures ◽  
Fine Aggregate ◽  
Test Results ◽  
Creep Tests ◽  
Aggregate Gradation ◽  
Static Creep ◽  
Fine Aggregates

The objective of this study is to investigate and evaluate the effect of fine aggregates (aggregate size smaller than or equal to 2.36 mm) on the compressive strength and creep behavior of asphalt mixtures. The variables that are considered in the study include the sizes and gradations of fine aggregate. A kind of standant aggregate gradation and four kinds of reduced aggregate gradation mixture specimens are used. Uniaxial compression and static creep tests were realized at different loading conditions. The test results showed that the different fine aggregate sizes do not result in significant differences in compressive strength and creep values using the same percentage of fine aggregates (38.4%). Only the different gradations showed a little differences for mixtures made with different gradations but same aggregate size (between 2.36 and 1.18 mm).

Aggregate gradation effect on the fatigue performance of recycled asphalt mixtures

2019 ◽  
Vol 22 (1) ◽  
pp. 165-184 ◽  
Author(s):  
G. Bharath ◽  
K. Sudhakar Reddy ◽  
Vivek Tandon ◽  
M. Amaranatha Reddy
Keyword(s):  
Asphalt Mixtures ◽  
Fatigue Performance ◽  
Recycled Asphalt ◽  
Aggregate Gradation

Evaluation and Selection of Aggregate Gradations for Asphalt Mixtures Using Superpave

1997 ◽  
Vol 1583 (1) ◽  
pp. 91-97 ◽  
Author(s):  
R. Michael Anderson ◽  
Hussain U. Bahia
Keyword(s):  
Design Process ◽  
Permanent Deformation ◽  
Asphalt Binder ◽  
Asphalt Mixtures ◽  
Mix Design ◽  
Second Phase ◽  
Aggregate Structure ◽  
Aggregate Gradation ◽  
Complex Process ◽  
Selection Of

The design of asphalt mixtures is a complex process that requires the proper proportioning of materials to satisfy mixture volumetric and mechanical properties. The majority of time spent in the mix design process is used in evaluating and selecting aggregate gradations to meet project requirements. The latest set of requirements for asphalt mixtures is the Superpave system, developed during the Strategic Highway Research Program. This system incorporates materials selection, evaluation of trial aggregate structures, selection of design asphalt binder content, moisture sensitivity, and, in some cases, determination of performance properties of the selected asphalt-aggregate blend. The selection of a design aggregate structure reduces to selecting an aggregate gradation that will meet minimum volumetric and densification criteria, and selecting an aggregate structure that will provide adequate resistance to permanent deformation, fatigue, and thermal cracking. In the Superpave volumetric mix design process, achieving voids in mineral aggregate (VMA) is the most difficult task facing the mix designer. One phase of this evaluation focuses on providing Guidelines to achieve VMA requirements with Superpave mix designs. This phase was accomplished by evaluating the existing database of information on Superpave mix designs at the Asphalt Institute. The second phase examines the relationship between properties determined during the Superpave volumetric mix design process, and material properties determined by mix analysis tests.

Field Density Investigation of Asphalt Mixtures in Minnesota

2021 ◽  
pp. 036119812110095
Author(s):  
Tianhao Yan ◽  
Mihai Marasteanu ◽  
Chelsea Bennett ◽  
John Garrity
Keyword(s):  
Material Properties ◽  
Research Effort ◽  
Aggregate Size ◽  
Asphalt Mixtures ◽  
Mix Design ◽  
Maximum Aggregate Size ◽  
Density Level ◽  
Fine Aggregate ◽  
Aggregate Gradation ◽  
Field Density

In a current research effort, University of Minnesota and Minnesota Department of Transportation have been working on designing asphalt mixtures that can be constructed at 5% air voids, similar to the Superpave 5 mix design. High field density of asphalt mixtures is desired because it increases the durability and extends the service life of asphalt pavements. The paper investigates the current situation of field densities in Minnesota, to better understand how much improvement is needed from the current field density level to the desired level, and to identify possible changes to the current mix design to improve field compactability. Field densities and material properties of 15 recently constructed projects in Minnesota are investigated. First, a statistical analysis is performed to study the probability distribution of field densities. Then, a two-way analysis of variance is conducted to check if the nominal maximum aggregate size and traffic levels have any significant effect on field densities. A correlation analysis is then conducted to identify significant correlations between the compactability of mixtures and their material properties. The results show that the field density data approximately obey normal distribution, with an average field density of 93.4% of theoretical maximum specific gravity; there are significant differences in field density between mixtures with different traffic levels; compactability of mixtures is significantly correlated with fine aggregate angularity and fine aggregate gradation of the mixtures.

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