Abstract: This study is to compare the results of temperature sensitivity tests of foamed bitumen asphalt concrete (AC 8) compacted at 95ºC with that of the reference mixture compacted at the conventional temperature of 140ºC. The tests and subsequent analysis confirm the advantageous effects the modification of bitumen 50/70 with 2.5% Fischer-Tropsch (FT) synthetic wax has on the characteristics of asphalt concrete. The characteristics investigated in this study included the air void content and moisture resistance of the specimens in one freezing cycle test (ITSR). Additionally, the relationships between air void content and stiffness moduli were investigated. The analysis of temperature sensitivity was conducted based on the measured indirect tensile stiffness modulus, Sm, (IT-CY) at -10ºC, 0ºC, 10ºC and 25ºC. The parameters of the asphalt concrete compacted at 95ºC made with FT wax modified foamed bitumen (FT=2.5%) are comparable to those of the reference mixture compacted at 45ºC.
B I B L I O G R A F I A[1] M. Iwański, G. Mazurek, Optimization of the Synthetic Wax Content on Example of Bitumen 35/50, Procedia Engineering 57 (2013) 414-423.
[2] K.J. Jenkins, J.L.A. de Groot, M.F.C Van de Ven, A.A.A. Molenaar, Half-warm Foamed Bitumen Treatment, A New Process. Conference on Asphalt pavements for Southern Africa, Victoria Falls, Zimbabwe, 1999.
[3] X. Yu, Y. Wang, T. Luo, Impacts of water content on rheological properties and performance-related behaviours of foamed war-mix asphalt, Construction and Building Materials 48 (2013) 203-209, DOI:10.1016/j.conbuildmat.2013.06.018.
[4] M.F.C Van De Ven, K.J. Jenkins, J.L.M. Voskuilen, R. Van Den Beemt, Development of (half-) warm foamed bitumen mixes: State of the art, International Journal of Pavement Engineering 8(2) (2007) 163-175, DOI: 10.1080/10298430601149635.
[5] M.R.D. Hugo, Silva, R.M. Joel R.M. Oliveira
Peralta, J. a, Salah E. Zoorob b. Optimization of warm mix asphalt using different blends of binders and synthetic paraffin wax contents, Construction and Building Materials 24(9) (2010) 1621-1631, DOI:10.1016/j.conbuildmat.2010.02.030.
[6] WT-2 Nawierzchnie asfaltowe na drogach krajowych. Część I. Mieszanki mineralno-asfaltowe. Wymagania Techniczne, [Road pavements on national roads..Part I. Asphalt mixes. Technical Guidelines - 2], Warsaw, 2010.
[7] J. Judycki, P. Jaskuła, M. Pszczoła, J. Alenowicz, B. Dołżycki, M. Jaczewski, D. Ryś, M. Stienss, Katalog typowych konstrukcji nawierzchni podatnych i półsztywnych [Catalogue of typical flexible and semi-rigid pavement constructions], GDDKiA, 2014.
[8] M. Iwański, M. Chomicz-Kowalska, K. Maciejewski, Application of synthetic wax for improvement of foamed bitumen parameters, Construction and Building Materials 83 (2015) 62-69, DOI.org/10.1016/j.conbuildmat.2015.02.060.
[9] M. Iwański, A. Chomicz-Kowalska, J. Mrugała, Application of the synthetic wax to improve the foamed bitumen parameters used in half-warm bituminous mixtures, 9th International Conference Environmental Engineering. Procedia Engineering, Vilnius, Lithuania, 2014.
[10] H.R. Lindman, Analysis of variance in complex experimental designs, San Francisco: W. H. Freeman & Co., 1974.
[11] G.E.P. Box, S.L. Anderson, Permutation theory in the derivation of robust criteria and the study of departures from assumptions, Journal of the Royal Statistical Society 17, pp. 1-34, 1955.
[12] D. George, M. Mallery, SPSS for Windows Step by Step: A Simple Guide and Reference, 17.0 update (10a ed.) Boston: Pearson, 2010.
[13] P. Mieczkowski, The effect of wearher and climatic factors on temperature drops in built-in asphalt mixtures, Foundations of civil and environmental engineering 9 (2007) 95-104.
[14] J. Król, K. Kowalski, P. Radziszewski, Rheological behavior of n-alkane modified bitumen in aspect of Warm Mix Asphalt technology Construction and Building Materials 93 (2015) 703-710, DOI.org/10.1016/j.conbuildmat.2015.06.033.
[15] D. Sybilski et al., Sprawozdanie końcowe z pracy: Weryfikacja i uaktualnienie metody badawczej wodoodporności z cyklem zamrażania mieszanek mineralno-asfaltowych, Temat TN-255, Etap III – Zadanie 7,8 [Final progress report: Verification and updating of water resistance test method with a freeze-thaw cycle of bituminous mixtures], IBDiM, Warszawa, 2013.
[16] P. Jaskula, J. Judycki, Verification of the criteria for evaluation of water and frost resistance of asphalt concrete, Road Mater. Pavement Des., 9(1) (2008) 135-162.
[17] P. Jaskuła, J. Judycki, Durability of asphalt concrete subjected to deteriorating effects of water and frost, Journal of Performance of Constructed Facilities 30(1) (2016), DOI.org/10.1061/(ASCE)CF.1943-5509.0000645.
[18] J. Čorej, M. Korenko, E. Remišová, Climatic characteristics and the temperature regime of asphalt pavements, Komunikacie 6(3) (2004) 31-36.
[19] A. Vaitkus, D. Čygas, A. Laurinavičius, Z. Perveneckas, Analysis and Evaluation of Possibilities for The Use of Warm Mix Asphalt in Lithuania, The Baltic Journal of Road and Bridge Engineering IV(2) (2009) 80-86, DOI: 10.3846/1822-427X.2009.4.80-86. 
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