Tackling Steep Appalachian Grades

摘要

A Kentucky concrete slipforming contractor has moved in a big way into curb, gutter and parapet construction by utilizing the advanced technology available via the SP 25i and smaller SP 15i slipform pavers from Wirtgen America.This past year, Fox Enterprises used its new Wirtgen SP 25i slipform paver, not in offset mode to place curbs, guttersor parapet walls, but in inset mode to place a 12-ft-wide jointed portland cement concrete (JPCC) pavement on Ky. 80 in Hazard-right in the heart of the Appalachian Mountains. The 7,000-cu-yd project involved the complete removal of a 13-in. concrete pavement in which the subgrade failed, replacement of 4 in. of undesirable subgrade with new stone and placementof 13-in.-thick JPCC pavement that is 12-ft wide. This was done in 2,800-linear-ft pours.