Evaluating Roadway Subsurface Drainage Practices – Phase II

Project Details
STATUS

Completed

START DATE

06/10/13

END DATE

08/31/15

RESEARCH CENTERS InTrans, CTRE, PROSPER
SPONSORS

Iowa Department of Transportation
Iowa Highway Research Board

Researchers
Principal Investigator
Halil Ceylan

Director, PROSPER

Co-Principal Investigator
Bob Steffes

PCC Research Engineer, CPTech

Co-Principal Investigator
Kasthurirangan Gopalakrishnan

Associate Director, PROSPER

Co-Principal Investigator
Sunghwan Kim

Associate Director, PROSPER

About the research

The primary objectives of this Phase II research are as follows:

  • Evaluate seasonal variation effects (dry Fall 2012 versus wet Spring/Summer 2013, etc.) on subdrain outlet condition and performance
  • Investigate the characteristics of tufa formation in Iowa subdrain outlets (i.e., identify the factors influencing the tufa formation and prevention, at what stage does tufa formation start influencing subdrain outlet performance, etc.)
  • Investigate the condition of composite pavement subdrain outlets
  • Examine the effect of resurfacing/widening/rehabilitation on subdrain outlets (e.g., the effects of patching on subdrain outlet performance)
  • Identify a suitable drain outlet protection mechanism (like a headwall) and design for Iowa subdrain outlets based on a survey of nearby states
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