The influence of aggregate gradation designed by Bailey method on the volumetric properties of asphalt mixture prepared by superpave design method

2020 ◽  
Author(s):  
Yasir Mohammed Jebur ◽  
Abdulhaq Hadi Abedali
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Volumetric Properties ◽  
Aggregate Gradation

Palm Kernel Shell as Partial Coarse Aggregate Replacement in Asphalt Mixture: Optimum Binder Content and Volumetric Properties Investigation

2021 ◽  
Vol 1047 ◽  
pp. 179-185
Author(s):  
Siti Zubaidah Mohd Asri ◽  
Faridah Hanim Khairuddin ◽  
Choy Peng Ng ◽  
Noor Aina Misnon ◽  
Nur Izzi Md Yusoff ◽  
...  
Keyword(s):  
Coarse Aggregate ◽  
Asphalt Mixture ◽  
Control Sample ◽  
Palm Kernel ◽  
Binder Content ◽  
Partial Replacement ◽  
Volumetric Properties ◽  
Aggregate Gradation ◽  
Palm Kernel Shell ◽  
Mixture Samples

Pavement failures such as fatigue, rutting, cracking, bleeding, and stripping are typical pavement deterioration. Researchers have been experimenting with pavement modification to overcome these problems. This study determines the optimum binder content (OBC) for modifying an asphalt mixture with a partial replacement of coarse aggregate (5mm-14mm sieve size) with palm kernel shell (PKS). A 60/70 penetration grade bitumen was mixed with 10, 20 and 30% PKS at selected aggregate gradation following the Public Work Department of Malaysia (JKR/SPJ/2008-S4) specification. The preparation of 60 samples of unmodified and modified asphalt mixture employed the Marshall Method compacted with 75 blows. The OBC was determined based on five volumetric properties of asphalt mixture namely stability, flow, bulk density, void filled with asphalt, and void in total mix. The OBC and volumetric properties of the modified PKS asphalt mixture samples were compared with unmodified asphalt mixture samples in accordance to the specification. Results showed that the OBC sample with 30% aggregate replacement produced the highest OBC value of 5.53% relative to the control sample with 5.40% OBC. The trend for OBC with PKS replacement begins with 10% PKS with 5.30% OBC, 20% PKS with 5.32% OBC and 30% PKS. All volumetric properties of the PKS samples are within the specification limit. Thus, PKS has a promising potential as a coarse aggregate replacement in asphalt mixture.

Application of Bailey Method for Aggregate Grading Design of Continuous Dense Gradation Asphalt Mixture

2011 ◽  
Vol 413 ◽  
pp. 154-159 ◽  
Author(s):  
Wei Zhu ◽  
Hong Zhen Li ◽  
Shi Rang Ma ◽  
Da Bin Liu
Keyword(s):  
Tensile Strength ◽  
Design Method ◽  
Asphalt Binder ◽  
Asphalt Mixture ◽  
Computational Procedure ◽  
Ratio Test ◽  
Strength Ratio ◽  
Routine Method ◽  
Aggregate Gradation ◽  
Rutting Resistance

On the base of discussion and analysis of Bailey method for Aggregate Grading Design, the paper expounds particularly how to design Aggregate gradation of continuous dense gradation asphalt mixture by a accurate computational procedure, with the example of AC-20(asphalt cement 20 version) continuous dense gradation asphalt mixture design. It will benefit for designer to design graduation well. This also suggests using three ratios, [CA] Ratio, [FAc] Ratio and [FAf] Ratio, to analyze composite gradation. Thus the designed mixture has good rutting resistance and endurance. The key technologies about this design method were studied. In the context of the same asphalt binder and aggregate, two kinds of AC-20 aggregate gradations have been designed by using Bailey method and the routine method. With these two methods, several kinds of specimens for pavements performance tests has been made at separate optimum asphalt contents. These experiments have shown that the asphalt mixture designed by Bailey method has a better rutting resistance at high temperature, crack resistance at low temperature and durability than the one designed by the routine method. In these experiments, the dynamic stability is enhanced by one time to 6749 times/mm in rutting Test; the Tensile Strength Ratio (TSR) is improved greatly in Water Susceptibility Tensile Strength Ratio Test, which is much larger than the required value in the specification; the maximum bending and tension strain is also enhanced. As a result, Bailey method can be widely used in aggregate grading design in practical engineering.

scholarly journals Implementing the Superpave 5 Asphalt Mixture Design Method in Indiana

2020 ◽  
Author(s):  
John E. Haddock ◽  
Reyhaneh Rahbar-Rastegar ◽  
M. Reza Pouranian ◽  
Miguel Montoya ◽  
Harsh Patel
Keyword(s):  
Design Method ◽  
Asphalt Mixture ◽  
Field Trials ◽  
Mixture Design ◽  
Department Of Transportation ◽  
Aggregate Gradation ◽  
Air Voids ◽  
Depth Analysis ◽  
Mat Density ◽  
Statistical Metrics

Recent research developments have indicated that asphalt mixture durability and pavement life can be increased by modifying the Superpave asphalt mixture design method to achieve an in-place density of 95%, approximately 2% higher than the density requirements of conventionally designed Superpave mixtures. Doing so requires increasing the design air voids content to 5% and making changes to the mixture aggregate gradation so that effective binder content is not lowered. After successful laboratory testing of this modified mixture design method, known as Superpave 5, two controlled field trials and one full scale demonstration project, the Indiana Department of Transportation (INDOT) let 12 trial projects across the six INDOT districts based on the design method. The Purdue University research team was tasked with observing the implementation of the Superpave 5 mixture design method, documenting the construction and completing an in-depth analysis of the quality control and quality assurance (QC/QA) data obtained from the projects. QC and QA data for each construction project were examined using various statistical metrics to determine construction performance with respect to INDOT Superpave 5 specifications. The data indicate that, on average, the contractors achieved 5% laboratory air voids, which coincides with the Superpave 5 recommendation of 5%. However, on average, the as-constructed mat density of 93.8% is roughly 1% less than the INDOT Superpave 5 specification. It is recommended that INDOT monitor performance of the Superpave 5 mixtures and implement some type of additional training for contractor personnel, in order to help them increase their understanding of Superpave 5 concepts and how best to implement the design method in their operation.

scholarly journals Effect of Aggregate Gradation on the Stiffness of Asphalt Mixtures

2015 ◽  
Vol 16 (2) ◽  
pp. 39-49 ◽  
Author(s):  
Hasan Al-Mosawe ◽  
Nick Thom ◽  
Gordon Airey ◽  
Amjad Al-Bayati
Keyword(s):  
Particle Size ◽  
Particle Size Distribution ◽  
Size Distribution ◽  
Asphalt Concrete ◽  
Asphalt Mixture ◽  
Asphalt Mixtures ◽  
Volumetric Properties ◽  
Aggregate Gradation ◽  
Effect Of Particle Size ◽  
Indirect Tensile

Abstract Aggregate gradation plays an important role in the behaviour of asphalt mixtures. Packing of aggregate is a very important factor that will be affected by changing the aggregate gradation. Many researchers have investigated different ways of describing packing both theoretically and practically. Bailey ratios have recently been used to understand the volumetric properties of mixtures. In this paper, the Bailey ratios have been used, and two further ratios have also been introduced to allow the asphalt mixture gradation to be fully understood. Thirteen different aggregate gradations have been chosen within the 14 mm asphalt concrete specification to investigate the effect of particle size distribution on the stiffness of the mixture. It was found that variation in aggregate gradation has a significant effect on asphalt stiffness, even within specification limits, and a reasonable correlation between the set of ratios investigated and the Indirect Tensile Stiffness.

scholarly journals Asphalt Mixture for the First Asphalt Concrete Directly Fastened Track in Korea

2015 ◽  
Vol 2015 ◽  
pp. 1-6 ◽  
Author(s):  
Seong-Hyeok Lee ◽  
Dae-Wook Park ◽  
Hai Viet Vo ◽  
Samer Dessouky
Keyword(s):  
Asphalt Concrete ◽  
Design Method ◽  
Asphalt Mixture ◽  
Digital Camera ◽  
Aggregate Size ◽  
Fatigue Tests ◽  
Asphalt Mixtures ◽  
Maximum Aggregate Size ◽  
Aggregate Gradation ◽  
Modified Asphalt

The research has been initiated to develop the asphalt mixtures which are suitable for the surface of asphalt concrete directly fastened track (ADFT) system and evaluate the performance of the asphalt mixture. Three aggregate gradations which are upper (finer), medium, and below (coarser). The nominal maximum aggregate size of asphalt mixture was 10 mm. Asphalt mixture design was conducted at 3 percent air voids using Marshall mix design method. To make impermeable asphalt mixture surface, the laboratory permeability test was conducted for asphalt mixtures of three different aggregate gradations using asphalt mixture permeability tester. Moisture susceptibility test was conducted based on AASHTO T 283. The stripping percentage of asphalt mixtures was measured using a digital camera and analyzed based on image analysis techniques. Based on the limited research results, the finer aggregate gradation is the most suitable for asphalt mixture for ADFT system with the high TSR value and the low stripping percentage and permeable coefficient. Flow number and beam fatigue tests for finer aggregate asphalt mixture were conducted to characterize the performance of asphalt mixtures containing two modified asphalt binders: STE-10 which is styrene-butadiene-styrene (SBS) polymer and ARMA which is Crum rubber modified asphalt. The performance tests indicate that the STE-10 shows the higher rutting life and fatigue life.

Effect of Aggregate Shape on the Properties of Asphaltic Concrete AC14

2014 ◽  
Vol 71 (3) ◽  
Author(s):  
Ramadhansyah Putra Jaya ◽  
Norhidayah Abdul Hassan ◽  
Mohd Zul Hanif Mahmud ◽  
Md. Maniruzzaman A. Aziz ◽  
Meor Othman Hamzah ◽  
...  
Keyword(s):  
Resilient Modulus ◽  
Testing Machine ◽  
Asphalt Mixture ◽  
Volumetric Properties ◽  
Asphaltic Concrete ◽  
Modified Bitumen ◽  
Stiffness Modulus ◽  
Aggregate Gradation ◽  
Aggregate Shape ◽  
The Impact

The objective of this study is to evaluate the effects of aggregate shape on volumetric properties of asphaltic concrete mixtures. The aggregate gradation of AC14 was prepared using granite aggregates crushed via compression and impact crushers. In this study, compression crusher was used to produce aggregates with flaky and elongated shape while the impact crusher was used to produce aggregates with a cubical shape. Modified bitumen, Styrene-Butadiene-Styrene (SBS) was used in preparing the specimens. The stability, density, voids in total mix, voids filled with bitumen, and voids in mineral aggregate of asphalt mixture specimens was investigated. In addition, the resilient modulus test with temperature of 25ºC and stiffness modulus test with temperature of 40ºC was carried out using the Universal Testing Machine in accordance with ASTM D4123 standard. The test results showed that the volumetric properties improved when cubical aggregate was introduced to the asphalt mixture. Moreover, the incorporation of geometrically cubical aggregates in asphalt mixture causes an increase in resilient and stiffness modulus compared to asphalt mixture prepared with irregularly aggregates.

Sign in / Sign up

Export Citation Format

Share Document