Peru, IN
GeoSpray® Geopolymer Mortar: Highway Culvert

Project Overview

The Indiana Department of Transportation (INDOT) had a series of culverts along US Highway 31 in northwestern Indiana in need of rehabilitation. It specified various pre-approved options based on the physical state of the culverts, the access to the inlet and outlet and hydraulic concerns. One of these culverts was a 78-inch CMP segmented pipe installed in the late 1970s. The pipe had at one point been lined with asphalt and the invert was cracked and worn. From this damage, it was showing severe ovality under one of the traffic lanes of the highway. The decision by INDOT was originally to slip line the pipe. While the solution did meet the structural needs of the road, the loss of waterway created a secondary hydraulic concern. Part of the project proposed a second 36-inch culvert to be bored under the highway so the expected hydraulic flows could be properly handled and not cause additional problems to the roadway.

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