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Sustainability 2018, 10(1), 198; https://doi.org/10.3390/su10010198

Soft Asphalt and Double Otta Seal—Self-Healing Sustainable Techniques for Low-Volume Gravel Road Rehabilitation

1
Road Research Institute, Vilnius Gediminas Technical University, Linkmenų g. 28, LT-80217 Vilnius, Lithuania
2
Department of Roads, Vilnius Gediminas Technical University, Saulėtekio ave. 11, LT-10223 Vilnius, Lithuania
*
Author to whom correspondence should be addressed.
Received: 8 January 2018 / Revised: 11 January 2018 / Accepted: 11 January 2018 / Published: 15 January 2018
(This article belongs to the Special Issue Sustainability in Construction Engineering)
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Abstract

Increased traffic flow on low-volume gravel roads and deficiencies of national road infrastructure, are increasingly apparent in Lithuania. Gravel roads do not comply with requirements, resulting in low driving comfort, longer travelling time, faster vehicle amortization, and dustiness. The control of dustiness is one of the most important road maintenance activities on gravel roads. Another important issue is the assurance of required driving comfort and safety. Soft asphalt and Otta Seal technologies were proposed as a sustainable solution for the improvement of low-volume roads in Lithuania. Five gravel roads were constructed with soft asphalt, and 13 gravel roads were sealed with double Otta Seal, in 2012. The main aim of this research was to check soft asphalt and double Otta Seal’s ability to self-heal, on the basis of the results of the qualitative visual assessment of pavement defects and distress. The qualitative visual assessment was carried out twice a year following the opening of the rehabilitated road sections. The results confirmed soft asphalt and double Otta Seal’s ability to self-heal. The healing effect was more than 13% and 19% on roads with soft asphalt and double Otta Seal, respectively. In addition, on some roads, all cracks observed in spring self-healed during summer. View Full-Text
Keywords: double Otta Seal; gravel roads; qualitative visual assessment of defects; soft (low viscosity) bitumen; soft asphalt; self-healing; sustainable technique double Otta Seal; gravel roads; qualitative visual assessment of defects; soft (low viscosity) bitumen; soft asphalt; self-healing; sustainable technique
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Vaitkus, A.; Vorobjovas, V.; Tuminienė, F.; Gražulytė, J.; Čygas, D. Soft Asphalt and Double Otta Seal—Self-Healing Sustainable Techniques for Low-Volume Gravel Road Rehabilitation. Sustainability 2018, 10, 198.

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