The purpose of crack & seat of concrete pavement prior to overlaying it is to minimize the occurrence and severity of reflection cracks in the overlay caused by slab action by cracking the concrete slabs to reduce their effective length and then seating the cracked slabs to reestablish support between the subbase and the slabs. Some specifications require that the road be opened to traffic after cracking to accomplish the seating prior to paving the overlay. Other specifications require a proof roller be used to seat the cracked concrete. Most cracking has been performed with the T8600 Badger Breaker® although the MHB Badger Breaker® is also used for cracking.
Feb 11, 2015
Evaluation of Concrete Slab Fracturing Techniques in Mitigating Reflective Cracking Through Asphalt Overlays
This report presents the results of an evaluation of concrete slab fracturing techniques as a means of arresting or retarding reflective cracking through asphalt overlays placed on severely distressed portland cement concrete pavement.
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Caltrans Plans for Perpetual Pavement
This very successful crack & seat and asphalt overlay project received the Asphalt Pavement Alliance’s Perpetual Pavement by Conversion Award .
Crack & Seat Airport Pavements – Project Examples
Pictorial examples of Antigo’s process of cracking & seating airport pavements prior to asphalt overlay.
Antigo International – Concrete Pavement Rehabilitation
In-situ recycling options for concrete pavement rehabilitation provided worldwide by Antigo International.
California Interstate Crack & Seat Concrete Pavement with Asphalt Overlay Projects, 1991-2021
List of projects
