29 August 2021 to 2 September 2021
Renaissance Minneapolis Hotel, The Depot
UTC timezone

An innovative method to minimize the joint sealant requirement in BCOA pavements

Not scheduled
20m
Renaissance Minneapolis Hotel, The Depot

Renaissance Minneapolis Hotel, The Depot

Minneapolis, Minnesota, USA
Podium Presentation Construction Methods

Description

The small panelled cement concrete overlay over asphalt pavement is considered to be a very durable and maintenance free rehabilitation technique. These pavements have lower thickness requirement and dowel bars are not needed for load transfer. However, the number of joints is high as the panel size is small and hence there is a huge requirement of joint sealant. In this work, an attempt was made to minimize the joint sealant requirement by changing the joint sawing pattern. Test section was constructed for the study and square panels of 1 m, 1.5 m size are adopted. The joint sawing is divided into two stages. In the first stage the panels are sawn in to 3 m X 3 m sizes and after one day they are further sawed into 1 m or 1.5 m sizes. This pattern induces the full depth cracks at joints at 3 m interval only even after years of traffic. Even in the full depth joints at 3 m interval, every third joint has a crack width of nearly 0.8 mm and other two joints have a crack width less than 0.2 mm. So, if these full depth joints only are sealed then the cost of sealant will be less and purpose of sealant will be fully served. This will save the sealant cost by 70% for 1 m panels and by 50 % for 1.5 m panels. The crack width measurements and the frequency of full depth cracks are discussed in the paper.

Primary author

Co-authors

Prof. Sudhakar Reddy Kusam (Professor) Prof. Amarnatha Reddy Muppireddy (Professor)

Presentation Materials

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Paper

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