Factors Determining the Inhomogeneity of Reclaimed Asphalt Pavement and Estimation of its Components Content Variation Parameters

Darjušas Mučinis; Henrikas Sivilevičius; Rolandas Oginskas

doi:10.3846/1822-427X.2009.4.69-79

Factors Determining the Inhomogeneity of Reclaimed Asphalt Pavement and Estimation of its Components Content Variation Parameters

Authors

Darjušas Mučinis Dept of Roads, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania
Henrikas Sivilevičius Dept of Transport Technological Equipment, Vilnius Gediminas Technical University, Plytinės g. 27, 10105 Vilnius, Lithuania
Rolandas Oginskas Dept of Roads, Vilnius Gediminas Technical University, Saulėtekio al. 11, 10223 Vilnius, Lithuania

DOI:

https://doi.org/10.3846/1822-427X.2009.4.69-79

Keywords:

reclaimed asphalt pavement (RAP), homogeneity, statistical analysis, gradation

Abstract

With a view to saving bitumen and mineral substances and also for the purpose of preventing environmental pollution, the old asphalt pavement (AP) may be milled without increasing the thickness of pavement structure and subjected to hot recycling for reuse in the same or any other location. However, the suitability of reclaimed asphalt pavement (RAP) for reuse depends on its composition (the content and gradation of bitumen) and the properties of its components. Hence, the present study aims at providing a systematic analysis of factors that determine the inhomogeneity of RAP. To this end, RAP samples, taken from RAP being loaded from the milling machine onto the transport means and from RAP stored in the territorial storage facilities of asphalt concrete (AC) plants, were examined in an accredited laboratory to determine, for each sample unit, the composition (the content and gradation of aged soluble bitumen), the content of moisture and the gradation of non-extracted granules. The statistical characteristics showing the actual homogeneity of RAP sampled from different sources were also estimated and analysed. Further, there was elaborated a model for comparing the homogeneity of RAP from different sample sets by the max values of standard deviations in the percentage mass passing the sieves and, based on the experimental data, derived the respective regression equation. The results of the performed comparison showed the absence of any statistically significant difference in terms of homogeneity between the three different RAP sample sets, i.e. RAP-1 sampled from the road, RAP-2 taken from the stockpiles being formed in different locations and RAP-3 obtained from RAP kept stockpiled in an open storage facility. The study was finalized by determining, in line with the Specification of Technical Requirements TRA ASFALTAS 08, the max content of RAP allowed for inclusion in a hot mix asphalt (HMA) mixture depending on the actual homogeneity of RAP determined.

References

Asphalt Institute. 1994. Mix design methods for asphalt concrete and other hot-mix types. 6th edition. Lexington: Asphalt Institute. 141 p. ISBN 1934154024

Aravind, K.; Das, A. 2007a. Preliminary constituent proportioning for central plant hotmix asphalt recycling, Journal of Materials in Civil Engineering 19(9): 740–745. DOI: 10.1061/(ASCE)0899-1561(2007)19:9(740)

Aravind, K.; Das, A. 2007b. Pavement design with central plant hot-mix recycled asphalt mixes, Constructions and Building Materials 21(5): 928–936. DOI: 10.1016/j.conbuildmat. 2006.05.004.

Baroux, R. 1980. Recyclage des enrobés bitumineux en centrale d’enrobage. Les problémes de matériel, Bulletin de liaison des ratoires des ponts et chaussées 105: 98–102.

Butkevičius, S.; Petkevičius, K.; Kamaitis, I. Z. 2007. Evaluation of flexible road pavement construction state using objective strength criteria, The Baltic Journal of Road and Bridge Engineering 2(2): 61–66.

Carter, A.; Stroup-Gardiner, M. 2007. Indirect tension relaxation test to evaluate the effect of the addition RAP to HMA mixes, Journal of Materials in Civil Engineering 19(3): 219–226. DOI: 10.1061/(ASCE)0899-1561(2007) 19:3(219)

Daniel, I. S.; Lachance, A. 2005. Mechanistic and volumetric properties of asphalt mixtures with recycled asphalt pavement, Transportation Research Record 1929: 28–36. DOI: 10.3141/1929-04

Doh, S. Y.; Amirkhanian, S. N.; Kim, K. W. 2008. Analysis of unbalanced binder oxidation level in recycled asphalt mixture using GPC, Construction and Building Materials 22(6): 1253–1260. doi :10.1016/j.conbuildmat.2007.01.026

Haryanto, I.; Takahashi, O. 2007. Use of secant shear modulus for rutting potential assessment of Indonesian wearing course mixtures, The Baltic Journal of Road and Bridge Engineering 2(3): 95–100.

Huang, B.; Li, G.; Vukosavljevic, D.; Shu, X.; Egan, B. K. 2005. Laboratory investigation of mixing hot-mix asphalt with reclaimed asphalt pavement, Transportation Research Record 1929: 37–45. DOI: 10.3141/1929–05

Karalevičius, I.; Sivilevičius, H. 2005. The dynamics of changes in asphalt concrete mixture composition in storage, transportation and laying, in Proc of the 6th International Conference “Enviromental Engineering”: selected papers, vol. 2. Ed. by Čygas, D.; Froehner, K. D. May 26–27, 2005, Vilnius, Lithuania. Vilnius: Technika, 719–725.

Karlsson, R.; Isacsson, U. 2006. Material-related aspects of asphalt recycling – State-of-the-art, Journal of Materials in Civil Engineering 18(1): 81–92. DOI: 10.1061/(ASCE)0899-1561(2006)18:1(81)

Kim, K. W.; Kim, K.; Doh, Y. S.; Amirkhanian, S. N. 2006. Estimation of RAP’s binder viscosity using GPS without binder recovery, Journal of Materials in Civil Engineering 18(4): 561–567. DOI: 10.1061/(ASCE)0899-1561(2006) 18:4(561)

Laurinavičius, A.; Oginskas, R. 2006. Experimental research on the development of rutting in asphalt concrete pavements reinforced with geosyntetic materials, Journal of Civil Engineering and Management 12(4): 311–317.

McDaniel, R.; Anderson, R. M. 2001. Recommended use of reclaimed asphalt pavement in the Superpave mix design method: Technician’s manuel, NCHRP Report 452. National Academy Press, Washington, D. C. 49 p.

Mučinis, D.; Čygas, D.; Oginskas, R. 2008. The possibility of using reclaimed asphalt pavement (RAP) in hot mix asphalt in Lithuania, in Proc of the 7th International Conference “Environmental Engineering”: selected papers, vol. 3. Ed. by Čygas, D.; Froehner, K. D. May 22–23, 2008, Vilnius, Lithuania. Vilnius: Technika, 1199–1203.

Pereira, P. A. A.; Oliveira, I. R. M.; Picado-Santos, L. G. 2004. Mechanical characterization of hot mix recycled materials, The International Journal of Pavement Engineering 5(4): 211–220. DOI: 10.1080/10298430412331333668

Petkevičius, K.; Sivilevičius, H. 2008. Necessary measures for ensuring the quality of hot mix asphalt in Lithuania, The Baltic Journal of Road and Bridge Engineering 3(1): 29–37.

Shen, I.; Amirkhanian, S.; Miller, I. A. 2007. Effects of rejuvenating agents on superpave mixtures coating reclaimed asphalt pavement, Journal of Materials in Civil Engineering 19(5): 376–384. DOI: 10.1061/(ASCE)0899-1561(2007)19:5(376)

Shoenberger, I. E.; DeMoss, T. A. 2005. Hot-mix recycling of asphalt concrete airfield pavements, The International Journal of Pavement Engineering 6(1): 17–26. DOI: 10.1080/10298430500041198

Shu, X.; Huang, B; Vukosavljevic, D. 2008. Laboratory evaluation of fatigue characteristics of recycled asphalt mixture, Construction and Building Materials 22(7): 1323–1330. doi :10.1016/j.conbuildmat.2007.04.019

Sivilevičius, H.; Vislavičius, K. 2008. Stochastic simulation of the influence of variation of mineral materials grading and dose weight on the homogeneity of hot-mix asphalt, Construction and Building Materials 22(9): 2007–2014. DOI:10.1016/j.conbuildmat.2007.07.001

Sivilevičius, H. 2003. Influence of homogeneity of mineral materials grading and dosing errors on the stability of asphalt concrete mixture composition, Journal of Civil Engineering and Management 9(1): 25–35.

Sivilevičius, H. 1998. Asfaltbetonio regeneravimo technologijos ir įrenginiai. Instrukcija [Recycling asphalt concrete technologies and equipments. Guidelines], State Enterprise “Problematika”. Vilnius. 42 p.

Stock, A. F. 1985. Bitumen recovered from highways and its use in recycled mixes, The Journal of the Institution of Highways and Transportation 5:12–16.

Stroup-Gardiner, M.; Wagner, C. 1999. Use of reclaimed asphalt pavement in superpave hot-mix asphalt applications, Transportation Research Record 1681: 1–9. DOI: 10.3141/1681-01

Vaitkus, A.; Čygas, D.; Laurinavičius, L.; Juzėnas, A. A. 2007. Evaluation of geotextiles separation performance on the impact of transport loads: experimental research-stage 1, The Baltic Journal of Road Bridge Engineering 2(1): 45–50.

Widyatmoko, I. 2008. Mechanistic-empirical mixture design for hot mix asphalt pavement recycling, Construction and Building Materials 22(2): 77–87. doi :10.1016/j.conbuildmat.2006.05.041