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References 1. J. Judycki, B. Dołżycki, Analysis of permanent deformation of asphalt pavement on the basis of fi eld and laboratory testing of permanent deformations (in Polish), VIII Konferencja Naukowa Komitetu Inżynierii Lądowej i Wodnej PAN i Komitetu Nauki PZITB, Krynica 2002, Inżynieria komunikacyjna, s. 201-208. 2. J. Piłat, P. Radziszewski, Road materials technology (in Polish). WKŁ, 2009, 509 s. 3. B. Stefańczyk, P. Mieczkowski, Hot mix asphalt - performance and research (in Polish). WKŁ. Warszawa. 2008. 4. M. Kilas M, A. Vaitkus., M. Paliukaitė, Warm Mix

Concrete Pavement”, Revised Edition. State Corporation of Roads and Bridges, Ministry of Housing and Construction, Republic of Iraq, 2003. [19]. SEBAALY P. E., HILTY E. AND WEIZEL D., “Effectiveness Of Lime In Hot Mix Asphalt Pavement”, University of Nevada, Reno, USA, 2001. [20]. SENGUL C.,E., AKSOY A., ISKENDER E. AND OZEN H., “Hydrated Lime Treatment Of Asphalt Concrete To Increase Permanent Deformation Resistance”, Journal of Construction and Building Materials 30: 139-148, 2011. [21]. SHAHROUR A. M., AND SALOUKE, G. B., “Effect of Quality and Quantity of Locally

References Erkens. S. Asphalt Concrete Response (ACRe) - Determination, Modeling and Prediction. Delft University Press Science, Delft 2002. Blab Ronald, Gagliano Barbara, Kappl Karl Models for Permanent Deformation for Bituminous Bound Materials in Flexible Pavement // Proceedings of Final Reports from Sustainable and Advanced Materials for Road Infrastructure SAMARIS Conference SMA-05-DE11 2004. Lausanne, Swiss 2006. Park. S. Effect of Stress-Dependent Modulus and Poisson's Ratio on Rutting Prediction // Journal of Korean Geotechnical Society, KGS, Vol. 23, Nr

Transfer Program, Pavement Research Center at University of California Berkeley, Institute of Transportation Studies, California, USA, 2001. [23] SOUSA, J. B., CRAUS, J., MONISMITH, C.L., "Summary report on permanent deformation in asphalt concrete," Strategic Highway Research Program, Report no. SHRP-A/IR- 91-104, Washington, D.C., 1991. [24] SOUSA, J.B., SOLAIMANIAN, M., WEISSMAN, S.L., “Development and use of the repeated shear test (constant heigh): an optional Superpave mix design tool”, Strategic Highway Research Program, SHRP-A-698, Washington, DC, 1994. [25

.” Journal of the Association of Asphalt Paving Technologists, Vol. 37, 1968 p 629-656. Decoene, Y. 1990 “Contribution of cellulose fibers to the performance of porous asphalts”, Transportation Research Record n 1265, 1990, p. 82-88. Imran Hafeez & Mumtaz Ahmed Kamal, 2011 “Repeated Load Permanent Deformation Behavior of Mixes With and Without Modified Bitumen”, Mehran University Research Journal of Engineering & Technology, Volume 30, No. 1, January, 2011. IS: 1201 to 1220,1978 “Indian Standard Methods for Testing Tar and Asphalt”, IS: 1201 to 1220, Bureau of Indian

Abstract

Annually 100 to 200 thousand tons of steel slag aggregates are produced in Latvia. The study investigates the use of dolomite sand waste as a filler or/and sand material plus BOF steel slag as a fine and coarse aggregate for the design of high performance asphalt concrete.

Various combinations of steel slag, dolomite sand waste and conventional aggregates were used to develop AC 11 asphalt concrete mixtures. The tests of mix properties included resistance to permanent deformations (wheel tracking test, dynamic creep test) and fatigue resistance. Laboratory test results showed that asphalt concrete mixtures containing steel slag and local limestone in the coarse portion and dolomite sand waste in sand and filler portions had high resistance to plastic deformations and good resistance to fatigue failure.

Abstract

Cracks are common disturbances in pavement structure. The ability of hot mix asphalt to withstand tensile stresses is limited. This paper presents influence of different microfiber reinforcement types ITERFIBRA to hot mix asphalt behaviour in its chosen properties. Bulk density of hot mix asphalt, stiffness , resistance to the permanent deformation and resistance to the crack propagation are taken into consideration.

REFERENCES [1]. Ş.M. LAZĂR, “Contributions to the Overlay Design of Flexible Pavement Systems” , PhD thesis, TUCEB, September 2011 . [2]. T.J., FREEMAN şi S.H., CARPENTER, “Characterizing Permanent Deformation in Asphalt Concrete Placed over Portland Cement Concrete Pavements” , In Transportation Research Record: Journal of the Transportation Research Board, No. 1070, Transportation Research Board of the National Academies, Washington, D.C., pp. 342–387, 1986 . [3]. C., RĂCĂNEL, “Effects of Creep and Fatigue on the Behaviour of Asphalt Mixtures” , PhD thesis

Hot-Mix Asphalt Designs”, Transportation Research Circular, number E-C124, pp. 62 – 77, Washington, 2007. 4. I. Isailovic, M. P. Wistuba, C. F. Augusto, “Permanent deformation of hot mix asphalt under compression and tension”, Proceedings of the 6 th Euroasphalt & Eurobitume Congress, No. of pages 13, Prague, 2016. 5. N. P. Khousla, K. I. Harikrishnan, “Tensile Strength – a Design Tool for Superpave Mixtures”, No. of pages 188, Department of Civil Engineering, North Carolina State University, Raleight, NC, USA, 2007. 6. J. Kruger, E. Horak, “The appropriateness of

nieniszczące ” [“Non-destructive tests”] , Polish Society of Mechanical Engineers and Technicians, Ośrodek Doskonalenia Kadr SIMP w Warszawie [SIMP Human Resources Traning Centre in Warsaw]. [6] Socha G., Madejski B., Krysztofik J. i Czarnewicz S., 2014, „Sposób badania uszkodzenia struktury materiału wywołanego deformacją trwałą próbki poddanej rozciąganiu i próbka do badania uszkodzenia struktury materiału’’ [“Test method of the material structure damage caused by permanent deformation of a specimen subjected to tension and a sample for testing the material structure