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Comprehensive Subgrade Deflection Acceptance Criteria - Executive Summary, James Crovetti
Comprehensive Subgrade Deflection Acceptance Criteria - Executive Summary, James Crovetti
Transportation Research Center: Subgrade Deflection Studies
This executive summary presents a summary of the findings of all study phases conducted to develop recommendations for the development of specifications for subgrade acceptance based on measured deflections. The rolling wheel deflectomter (RWD), portable truck-mounted deflection measurement systems, and dynamic cone penetrometer (DCP) were utilized on numerous subgrade construction projects between the 1998 and 2001 construction seasons. Comparative nuclear density and soil stiffness gauge readings were also obtained at selected locations on many of the included construction projects.
The research findings indicate that deflection test results may be appropriate for identifying areas of poor in-place stability within constructed subgrades. …
Comprehensive Subgrade Deflection Acceptance Criteria - Pilot Implementation Report, James Crovetti, Jay Schabelski
Comprehensive Subgrade Deflection Acceptance Criteria - Pilot Implementation Report, James Crovetti, Jay Schabelski
Transportation Research Center: Subgrade Deflection Studies
This report has presents the findings of implementations of pilot specifications for subgrade acceptance based on measured deflections. The reconfigured rolling wheel deflectomter (RWD), portable truck-mounted deflection measurement systems, and dynamic cone penetrometer (DCP) were utilized on four subgrade construction projects during the 2001 construction season. Comparative nuclear density readings were obtained at selected locations within each project. Comparative soil stiffness gauge readings were also obtained on 2 of the pilot projects
The research findings from this and previous study phases indicate that deflection test results may be appropriate for identifying areas of poor in-place stability within constructed subgrades. However, …