Author: Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 115
Book Description
Dynamic Cone Penetrometer Criteria for Evaluation of Subgrade and Aggregate Base Courses
Author: Use of Dynamic Cone Penetrometer in Subgrade and Base Acceptance
Author: Shin WuPublisher:
ISBN:
Category : Penetrometers
Languages : en
Pages : 124
Book Description
The Dynamic Cone Penetrometer (DCP) is a simple device for measuring the stiffness of unbound materials. The DCP works by driving a steel rod into bases and soil with a preset amount of energy; the stiffness of unbound materials at different depths can be measured by continuously monitoring the rate of penetration, yielding a stiffness profile. With its ability to collect and analyze date quickly and easily, the DCP compares favorably with other devices used to evaluate an in-situ base and subgrade during construction. The DCP is also the only device available today than can evaluate subgrade quality in all three dimensions. Most highway agencies accept unbound materials in base and subgrade based on density tests. But density is not a measurement of the strength (stiffness) of these materials. Field data collected in this study indicated that accepting the subgrade based on density tests did not guarantee the strength met design requirements. Accepting the base and subgrade based on density is thus one of the weak links in the process of designing and constructing pavement. During the 2003 and 2004 construction seasons, the Ohio Research Institute for Transportation and the Environment (ORITE) collected DCP data from 10 road projects in Ohio. Experience from this study proves that the DCP is a viable alternative device to evaluate in-situ base and subgrade materials during construction. Data collected shows that engineers can use the DCP to quantify the construction quality of the as-built materials. Based on this study, ORITE concludes that adopting DCP testing in unbound material acceptance specifications can greatly improve the monitoring of final product quality and thus enhance pavement performance. This report describes the ORITE study. The report also provides a construction site DCP testing procedure and proposes a set of DCP unbound material acceptance criteria and standards.
Application of the Dynamic Cone Penetrometer to Minnesota Department of Transportation Pavement Assessment Procedures
Author: Thomas R. BurnhamPublisher:
ISBN:
Category : Compacting
Languages : en
Pages : 80
Book Description
The Minnesota Department of Transportation (Mn/DOT) began testing the dynamic cone penetrometer (DCP) in 1991, finding the DCP an effective tool in the assessment of subsurface pavement conditions and strength. Researchers conducted extensive DCP testing and research on both the Minnesota Road Research Project (Mn/ROAD) and several pilot project sites in an effort to understand its useful applications in Minnesota. Mn/DOT currently specifies two applications of DCP testing in its pavement assessment procedure. One application involves using the DCP as a quality control device during the backfill compaction of pavement edge drain trenches. The second application involves its use in quality control of granular base layer compaction. This report details these applications and includes a copy of both specifications in the appendices.
Nondestructive Testing of Pavements and Backcalculation of Moduli
Author: Shiraz D. TayabjiPublisher: ASTM International
ISBN: 0803128584
Category : Materials
Languages : en
Pages : 534
Book Description
As with the previous two symposia, the 32 papers from the June/July, 1999, Seattle symposium present advances in the nondestructive testing of pavements using conventional falling weight deflectometer techniques and other promising techniques such as ground penetrating radar, rolling weight deflecto
Use of the Dynamic Cone Penetrometer to Verify and Correlate with Soil Subgrade and Aggregate Base CBR Values for the Purposes of Design of Low Volume Traffic Asphalt Concrete Roadways
Author: Oklahoma. Department of TransportationPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 65
Book Description
Base Compaction Specification Feasibility Analysis
Author: Publisher:
ISBN:
Category : Aggregates (Building materials)
Languages : en
Pages : 148
Book Description
The objective of this research is to establish the technical engineering and cost analysis concepts that will enable WisDOT management to objectively evaluate the feasibility of switching construction specification philosophies for aggregate base. In order to accomplish this goal, field and laboratory testing programs were conducted on existing HMA pavements and on base layers under construction as well as comprehensive survey was conducted on highway agencies practices pertaining to base layer construction in the U.S. and Canada. This research proposed construction specifications for aggregate base course layers.
Description and Application of Dual Mass Dynamic Cone Penetrometer
Author: Steve L. WebsterPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 62
Book Description
Instruction Report
Author: Waterways Experiment Station (U.S.)Publisher:
ISBN:
Category : Hydraulic engineering
Languages : en
Pages : 60
Book Description
Use of the Dynamic Cone Penetrometer to Estimate the California Bearing Ratio of Aggregate Base Courses
Author: Kelly Patton HopkinsPublisher:
ISBN:
Category : Pavements
Languages : en
Pages : 236
Book Description
Author: Robert L. Allbright