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Significance of Fines in Hot Mix Asphalt Synthesis

Abstract

According to their size, aggregates are classified in coarse grained, fine grained, and fines. The determination of fines content in aggregate materials is very simple and is performed through the aggregate washing during the sieving procedure to define the gradation curve. The very fine material consists of grains having a size lower than 63 μm. The presence of fines directly influences the composition and performance of concrete and asphalt mixtures (e.g. asphalt content, elasticity, fracture). The strength and load carrying capacity of hot mix asphalt (HMA) results from the aggregate framework created through particle-particle contact and interlock. Fines or mineral filler have a role in HMA. The coarse aggregate framework is filled by the sand-sized material and finally by the mineral filler. At some point, the smallest particles lose contact becoming suspended in the binder not having the particle-particle contact that is created by the larger particles. The overall effect of mineral filler in hot mix asphalt specimens has been investigated through a series of laboratory tests. It is clear that a behaviour influenced by the adherence of fines to asphalt film has been developed. The optimum bitumen content requirement in case of stone filler is almost the same as that for fly ash. It has been found that the percentage of fly ash filler is crucial if it exceeds approximately a value of 4%.

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Evaluation of Hot-Mix Asphalt Containing Portland Cement Treated Blast Furnace Slag

REFERENCES 1. S. Akbarnejad, L. J. M. Houben, A. A. A. Molenaar, “Application of aging methods to evaluate the long-term performance of road bases containing blast furnace slag materials”, Road Materials and Pavement Design 15(3): 488-506, 2014. https://doi.org/10.1080/14680629.2014.907196 . 2. H. A. Rondón, J. C. Ruge, M. Farias, “Behavior of a hot mix asphalt containing blast furnace slag as aggregate: evaluation by mass and volume substitution”, Journal of Materials in Civil Engineering 31(2), 2019. https://doi.org/10.1061/(ASCE)MT.1943

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Microfibre Reinforced Hot Mix Asphalt

References [1]. Jiri Vavricka; Fibres in hot mix asphalts; Diploma thesis, 2010 [2]. CSN EN 12697-6+A1; Bituminous mixtures - Test method for hot mix asphalt-Part 6: Determination of bulk density of bituminous specimens; Czech office for standards, metrology and testing; 2007 [3]. CSN EN 12697-26; Bituminous mixtures - Test method for hot mix asphalt-Part 26: Stiffness; Czech office for standards, metrology and testing; 2006 [4]. CSN EN 13108-20; Bituminous mixtures - Material specifications

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Performance-Based Asphalt Mix and Pavement Design

Mader M.: “Impact of Air Void Content on the Viscoelastic Behavior of Hot Mix Asphalt”, Proceedings of the 2nd Intern. Workshop on 4PBBT, University of California, CA, 2012. [4]. Spiegl M., Wistuba M., Lackner R. and Blab R.: “Risk assessment of lowtemperature cracking of asphalt - an experimental study”. 11th International Conference on Fracture Mechanics, Turin (Italy), 2005. [5]. Findley W. N., Kasif O. and Lai J.: “Creep and Relaxation of Nonlinear Viscoelastic Materials”, Dover Publications Inc., 1989. [6]. Francken

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Influence of aggregate gradation on hma mixes stability

References [1]. F.L. ROBERTS, P.S. KANDHAL, E.R. BROWN, D.Y. LEE, T.W. KENNEDY: “Hot mix asphalt materials, Mixture design, and construction”, National Asphalt Paving Association Education Foundation. Lanham, MD, 1996. [2]. S.S. BHOSALE: “Strength evaluation of fiber reinforced hot mixed open graded asphalt concrete”. Proceedings of 8th International Conference on Geosynthetics, September 18-22, Yokohama, Japan, pp. 801-804, 2006. [3]. P.S. KANDHAL, L.A. COOLEY: “The restricted zone in the Superpave aggregate

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Prediction of Asphalt Creep Compliance Using Artificial Neural Networks

Rheometer; a simple device for measuring low-temperature rheology of asphalt binders. Journal of Association of Asphalt Paving Technologists, 61, 117-53, 1992. 20. A. Zofka, M. Marasteanu, X. Li, T. Clyne, J. McGraw, Simple method to obtain asphalt binders low temperature properties from asphalt mixtures properties. Journal of the Association of Asphalt Paving Technologists, 80, 255-82, 2005. 21. A. Zofka, I. Yut, Alternative procedure for determination of hot mix asphalt creep compliance. ASTM Journal of Testing and Evaluation, 39, 1, 1

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Investigation of Hot In-Place Recycling Effects on Hot Mix Asphalt Pavement

Sulawesi, Indonesia. Roberts, F. L., Kandhal, P.S., Brown, E.R., Lee, D.Y., and Kennedy, T.W. (2009). “Hot Mix Asphalt Materials, Mixture, Design and Construction”. National Asphalt Pavement Association Research and Educational Foundation, Lanham, Maryland, USA. Roque, R., Birgission, B., Tia, M., and Nukunya, B. (2002). “Evaluation of Superpave Criteria for VMA and Fine Aggregate Angularity: Voids in Mineral Aggregate (VMA)”. Florida Department of Transportation Report No. WP10510865, Vol. 1 of 2. Von Quintus, H.L. and Simpson, A.L. (2002

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Ecological Solutions Applied to Hot Mix Asphalt

, preparation and implementation work. (Revised AND 605-2013); [9]. SR EN 13108-1 Bituminous mixtures. Material specifications. Part 1: Asphalt Concrete; [10]. SR EN 933-1 Tests for geometrical proprieties of aggregates. Part 1: Determination of particle size distribution - sieving method; [11]. SR EN 12697-12 Bituminous mixtures. Test methods for hot mix asphalt. Part 12: Determination of the water sensitivity of specimen; [12]. SR EN 12697-23 Bituminous mixtures. Test methods for hot mix asphalt. Part 23

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Use of Unconventional Aggregates in Hot Mix Asphalt Concrete

. 218-228, 2010. [4] A. Yilmaz and I. Sutas, “Electic-ARC Furnance Slag Utilization in Hot Mix Asphalt,” in Proceedings of the 5th Eurasphalt & Eurobitume Congress , Istanbul, Turkey, 2012. [5] S. P. Kandhall, G. L. Hoffman. “Evaluation of Steel Slag Fine Aggregate in Hot Mix Asphalt Mixtures,” Journal of the Transportation Research Board, vol. 1583. pp. 28-36. 1997. [6] The European Slag Association: „EUROSLAG”. (2006.). Legal status of slags. [Online]. Available: http://www.euroslag.com . [7] D

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Flexibl Pavement Analysis Considering Temperature Profile and Anisotropy Behavior in Hot Mix Asphalt Layer

Abstract

A three Dimensional finite element model (FEM) incorporating the anisotropic properties and temperature profile of hot mix asphalt (HMA) pavement was developed to predict the structural responses of HMA pavement subject to heavy loads typically encountered in the field. In this study, ABAQUS was adopted to model the stress and strain relationships within the pavement structure. The results of the model were verified using data collected from the Korean Highway Corporation Test Road (KHCTR). The results demonstrated that both the base course and surface course layers follow the anisotropic behavior and the incorporation of the temperature profile throughout the pavement has a substantial effect on the pavement response predictions that impact pavement design. The results also showed that the anisotropy level of HMA and base material can be reduced to as low as 80% and 15% as a result of repeated loading, respectively.

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