Laboratory Evaluation of Organic and Chemical Warm Mix Asphalt Technologies for SMA Asphalt

Martins Zaumanis, Eric Olesen, Viktors Haritonovs, Guntis Brencis, Juris Smirnovs


Warm mix asphalt (WMA) technologies allow significant lowering of the production and paving temperature of the conventional hot mix asphalt (HMA), which promise various benefits, e.g. lowering the greenhouse gas emissions, reduction of energy consumption, improved working conditions, better workability and compaction, etc. However, in order to reach widespread implementation of WMA, it is necessary to prove that it has the same or better mechanical characteristics and long-term performance as HMA. This article presents a laboratory study that has been conducted to evaluate two different WMA technologies – chemical (using Rediset WMX) and organic (using Sasobit) for the use with stone matrix asphalt (SMA). The properties of two types of bitumen after modification with two different dosages of each WMA additive have been tested by traditional empirical test methods and with the Dynamic Shear Rheometer for a wide temperature range. Asphalt testing has been performed for SMA11 type mixture. At first, the necessary changes in testing conditions were determined by means of asphalt stiffness – the results suggested that for adequate comparison with reference HMA, at least two hour asphalt aging is essential before preparing test specimens. The properties of asphalt were determined for specimens that were prepared at four different compaction temperatures by means of two compaction methods – Marshall hammer and gyratory compactor. The test results show that it is possible to reduce the compaction temperature of 155 °C for HMA to at least 125 °C for both WMA products with maintaining similar density and mechanical characteristics at intermediate to high temperatures.


warm mix asphalt; bitumen rheology; stiffness; aging; permanent deformations

Full Text:



Aschenbrener, T. 1995. Evaluation of the Hamburg Wheel-Tracking Device to Predict Moisture Damage in Hot-Mix Asphalt, Transportation Research Record 1492: 193–201.

Brown, H. M. 1993. Evaluation of Laboratory Properties of SMA Mixtures. NCAT Report No. 93-05. National Center for Asphalt Technology, Auburn AL, 22.

Bueche, N.; Dumont, A. G. 2011. Evaluation of WMA Key Performances with Regards to Curing Time and Conditioning Method, in Proc. of 2nd Internation Conference on Warm Mix Asphalt. October 11–13, 2011, St. Louis, USA. Available from internet:

Chowdhury, A.; Button, J. 2008. A Review of Warm Mix Asphalt. Publication No. SWUTC/08/473700-00080-1. Texas Transportation Institute. Springfield VA. 75 p.

Čygas, D.; Laurinavičius, A.; Perveneckas, Z.; Vaitkus, A. 2009. Analysis and Evaluation of Possibilities for the Use of Warm Mix Asphalt in Lithuania, The Baltic Journal of Road and Bridge Engineering 4(1): 80–86.

Hanz, A. J.; Faheem, A.; Mahmoud, E.; Bahia, H. U. 2010. Measuring Effects of Warm-Mix Additives: Use of Newly Developed Asphalt Binder Lubricity Test for the Dynamic Shear Rheometer, Transportation Research Record 2180: 85–92.

Hurley, G.; Prowell, B. 2006. Evaluation of Potential Processes for Use in Warm Mix Asphalt. NCAT Report No. 06-02, National Center for Asphalt Technology, Auburn AL, 37.

Perkins, S. W. 2009. Synthesis of Warm Mix Asphalt Paving Strategies for Use in Montana Highway Construction. Report No. FHWA/MT-09-009/8117-38, Helena MT: Montana Department of Transportation, 209 p.

Zaumanis, M.; Haritonovs V.; Brencis G.; Smirnovs J. 2012. Assessinng the Potential and Possibilities for the Use of Warm Mix Asphalt in Latvia, Scientific Journal of RTU. 2. series., Būvzinātne. 13: 53–59.

Zaumanis, M. 2011. Asphalt is Going Green: Overview of Warm Mix Asphalt Technologies and Research Results from All over the World. Saarbrucken: LAP LAMBERT Academic Publishing GmbH & Co. KG, 112 p. ISBN 978-3-8443-0018-5.

DOI: 10.3846/bjrbe.2012.26


  • There are currently no refbacks.

Copyright (c) 2012 Vilnius Gediminas Technical University (VGTU) Press Technika