Performance Evaluation of Concrete Pavement Granular Subbase: Pavement Surface Condition Evaluation (TR-554)

Project Details
STATUS

Completed

START DATE

03/01/07

END DATE

07/31/08

RESEARCH CENTERS InTrans, CEER, CTRE, PROSPER
SPONSORS

Iowa Department of Transportation
Iowa Highway Research Board

Researchers
Principal Investigator
David White

Geotechnical Engineer

Co-Principal Investigator
Halil Ceylan

Director, PROSPER

Co-Principal Investigator
Charles Jahren

Associate Director, Construction Materials and Methods / Asset Management

Co-Principal Investigator
Tom Cackler
Co-Principal Investigator
Muhannad Suleiman

Lecturer

Co-Principal Investigator
Kasthurirangan Gopalakrishnan

Associate Director, PROSPER

Student Researcher(s)
Sung Hwan Kim
Thang Phan

About the research

This research project covered a wide range of activities that allowed researchers to understand the relationship between stability, pavement distress, and recycled portland cement concrete (RPCC) subbase aggregate materials. Detailed laboratory and field tests, including pavement distress surveys, were conducted at 26 sites in Iowa were conducted.

Findings show that specific gravities of RPCC are lower than those of crushed limestone. RPCC aggregate material varies from poorly or well-graded sand to gravel. A modified Micro-Deval test procedure showed that abrasion losses of virgin aggregate materials were within the maximum Micro-Deval abrasion loss of 30% recommended by ASTM D6028-06. Micro-Deval abrasion loss of RPCC aggregate materials, however were much higher than those of virgin materials and exceeded 30% loss. Modulus of elasticity of RPCC subbase materials is high but variable. RPCC subbase layers normally have low permeability.

The pavement surfaces for both virgin and RPCC subbase across Iowa were evaluated to fulfill the objectives of this study related to field evaluation. Visual distress surveys were conducted to gather the detailed current pavement condition information including the type, extent, and severity of the pavement distresses. The historical pavement condition information for the surveyed field sections was extracted from the Iowa DOT’s Pavement Management Information System (PMIS). The current surface condition of existing field pavements with RPCC subbase was compared with the virgin aggregate subbase sections using two different approaches.

 

Light weight deflectometer testing in a core hole
MnDOT water infiltrometer to determine subbase permeability
Dynamic Cone Penetration testing of Subbase and subgrade
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