DBPapers
DOI: 10.5593/SGEM2014/B62/S26.044

SUSTAINABLE PAVEMENTS: UNSEALED JOINTS IN JOINTED PLAIN CONCRETE PAVEMENTS

M. Pradena, L. Houben
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-21-6 / ISSN 1314-2704, June 19-25, 2014, Book 6, Vol. 2, 339-346 pp

ABSTRACT
A technical, economic and environmental analysis over the road life cycle shows that concrete pavements are a sustainable paving alternative. However, concrete as material for pavements is hardly chosen when only the construction costs are considered in the analysis. The use of Jointed Plain Concrete Pavements (JPCPs) with unsealed joints not only yields the savings of sealing the joints, but also the ones for keeping them sealed. The total savings for not sealing the joints can reach 45% in 10 years. The objective of the present paper is to determine the conditions where it is feasible to use unsealed joints in JPCPs. For that, the technical basis of the unsealed joints are taken into account, together with the experiences of these kind of joints in different scenarios, for instance: JPCP applications for streets, bus corridors, highways, low volume roads and industrial yards; different times in service and climatic conditions. The necessary conditions to use unsealed joints in JPCPs are narrow saw-cuts (not more than 3 mm wide) and a base/soil layer with limited fines content. The applications where it is feasible to use unsealed joints are streets, low volume roads, industrial JPCPs (warehouses) and any JPCP application where the seals are not maintained. For JPCPs with higher traffic demands, as highways and bus corridors, the feasibility of JPCPs with unsealed joints will depend on the traffic and the weather. There are bus corridors with good performance in climate without excessive rainfall. Although there is not consensus about the performance of unsealed joints under heavy traffic and very demanding climates, there are unsealed joints in these conditions with excellent results.

Keywords: Sustainable, Pavements, Concrete, Unsealed Joints.