Case Study: Concrete Rubblization

Interstate 86
Allegany County, NY

Concrete rubblization is a process in which existing concrete roadways are pulverized, in place, to create a flexible base for asphalt overlay. The process recycles existing pavement and reduces the possibility of reflective and joint cracking of the asphalt overlay.

Specialties Company has rubblized concrete pavement in 10 states throughout the Midwest and East Coast. Typical specifications call for concrete pavement to be broken into particle sizing of 2 to 3 inch minus in the top half of pavement and 6 to 9 inch minus in the lower half of pavement. These requirements can vary based on existing pavement thickness, existing reinforcement and subgrade stability. Following the breaking, our crews seat the concrete utilizing a roller fitted with a Z-grid pattern to seat the broken pieces and resize the top surface to make it suitable for asphalt paving. The result is a strong but flexible base ideal for supporting asphalt pavement.

On this project, Specialties was challenged with rubblizing 143,000 square meters of existing Interstate 86 pavement in Allegany County, NY for prime contractor AL Blades and Sons, Inc. During a 15-day period, we rubblized and rolled the existing concrete with two of our multi-head breakers. Specialties’ breakers are capable of rubblizing a 12’ lane in a single pass, which decreases the likelihood of damaging or displacing the rubblized concrete from repeated heavy machinery traffic on the base material. This project called for 8 inches of asphalt paving on top of the rubblized base.

By using the rubblization process Specialties, delivered an efficient, cost effective solution for recycling this concrete interstate highway with limited disruption to the traveling public.