St. Joseph's Parish Parking Lot Analysis
Stahl Sheaffer completed geotechnical analysis and provided Full Depth Reclamation (FDR) recommendations for Saint Joseph’s Catholic Church parking lot in 2015. Because of the high clay content, Stahl Sheaffer recommended a mechanical adjustment by replacing 3” depth of clay found in subgrade with 3” depth of well-graded sand. This adjustment reduced the shrinkage cracking potential and the cement application rate. In addition, Stahl Sheaffer recommended that the contractor perform micro-cracking after curing the reclaimed mixture for two to three days. Micro-cracking creates a large amount of tiny cracks to release the tensile stress due to shrinkage strain but will not influence the structural performance of the FDR base layer but can prevent the large cracks from developing. The cost-effective means of FDR with cement stabilization improved the existing parking lot to sufficiently support the projected traffic.