Charles Jahren

Associate Professor, Department of Civil, Construction and Environmental Engineering (CCEE). See bio on the CCEE website.

This PI has additional projects on the CCEE website.

Projects

Listed with most current first, includes only those administered by CTRE.

• Iowa Mass Concrete for Bridge Foundations Study - Phase II
• Application of Visualization and Simulation Program to Improve Work Zone Safety and Mobility
• Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders (TR 531), Phase 2
• Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders, Phase II (TR-591)
• Rapid, Self-contained In-situ Permeameter for Field QC/QA of Pavement Base/Subbase Materials
• Madison County Bridge Evaluation
• Training Development for Pavement Preservation
• Iowa Mass Concrete for Bridge Foundation Study - Phase I
• Electronic Construction Collaboration System - Phase III
• Application of Visualization and Simulation Program to Improve Work Zone Safety and Mobility
• Development of Updated Specifications for Roadway Rehabilitation Techniques
• Electronic Construction Collaboration - Phase 1
• Stabilization Procedures to Mitigate Edge Rutting for Granular Shoulders - Phase II
• Rapid, Self-Contained In-Situ Permeameter for Field QA/QC of Pavement Base/Subbase Materials
• Feasibility of Visualization and Simulation Applications to Improve Work Zone Safety and Mobility
• Performance Evaluation of Concrete Pavement Granular Subbase: Pavement Surface Condition Evaluation (TR-554)
• Identification of Practices, Design, Construction, and Repair Using Trenchless Technology
• Effective Shoulder Design and Maintenance (TR-531)
• Developing an Effective Construction Training Program for Hispanic Supervisors and Craft Workers, Phase 3
• Measurements of Seasonal Changes and Spatial Variation in Pavement Subgrade Support Properties: A Link to Pavement Performance (TR-516)
• Manual of Practice for Roadway Maintenance Workers (TR-514)
• Developing an Effective Construction Training Program for American Supervisors and Hispanic Craft Workers, Phase 2
• Thin Maintenance Surfaces, Phase 3: Municipal Streets and Low-Volume Rural Roads (TR-507)
• Evaluation of Long Term Field Performance of Cold In-Place Recycled Roads (TR-502)
• Embankment Quality, Phase 4: Application to Unsuitable Soils (TR-492)
• Cost Comparison of Treatments Used to Maintain or Upgrade Aggregate Roads
• Developing an Effective Construction Training Program for Hispanic Supervisors and Craft Workers, Phase 1
• Determination of the Optimum Base Characteristics for Pavements (TR-482)
• Embankment Quality, Phase 3 (TR-401)
• Thin Maintenance Surfaces, Phase 2 with Guidelines for Winter Maintenance on Thin Maintenance Surfaces (TR-435)
• Embankment Quality, Phase 2 (TR-401)
• Thin Maintenance Surfaces (Amendment 14)
• Embankment Quality, Phase 1 (TR-401)
• Electronic Reference Library, Phase 1