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 PDF Download

Author: Oklahoma. Department of Transportation
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 65

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Author: Shin Wu
Publisher:
ISBN:
Category : Penetrometers
Languages : en
Pages : 124

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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.

Author: Steve L. Webster
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 62

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Author: Thomas R. Burnham
Publisher:
ISBN:
Category : Compacting
Languages : en
Pages : 80

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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.

Author: American Association of State Highway and Transportation Officials
Publisher: AASHTO
ISBN: 1560510552
Category : Pavements
Languages : en
Pages : 622

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Design related project level pavement management - Economic evaluation of alternative pavement design strategies - Reliability / - Pavement design procedures for new construction or reconstruction : Design requirements - Highway pavement structural design - Low-volume road design / - Pavement design procedures for rehabilitation of existing pavements : Rehabilitation concepts - Guides for field data collection - Rehabilitation methods other than overlay - Rehabilitation methods with overlays / - Mechanistic-empirical design procedures.

Author: Md. Rashadul Islam
Publisher:
ISBN:
Category : Penetrometers
Languages : en
Pages : 41

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Colorado Department of Transportation (CDOT) does not have evidence how the Dynamic Cone Penetrometer (DCP) test results correlate to other test methods (say, R-value) for Colorado's pavement subgrade. Even, the correlation between single-mass, and dual-mass DCP (which are two ways of conducting DCP test) is still unknown. Pavement Mechanistic Empirical Design (PMED) guide provides some correlations among different subgrade tests. However, those correlation are derived from national data. Research was thus needed to investigate the correlation between single-mass, and dual-mass DCP, and determine correlations among other subgrade tests for Colorado's pavement soils.

Author:
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 115

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Book Description

Author: Burt G. Look
Publisher: CRC Press
ISBN: 020394660X
Category : Science
Languages : en
Pages : 356

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Book Description
This practical handbook of properties for soils and rock contains, in a concise tabular format, the key issues relevant to geotechnical investigations, assessments and designs in common practice. In addition, there are brief notes on the application of the tables. These data tables are compiled for experienced geotechnical professionals who require a reference document to access key information. There is an extensive database of correlations for different applications. The book should provide a useful bridge between soil and rock mechanics theory and its application to practical engineering solutions. The initial chapters deal with the planning of the geotechnical investigation, the classification of the soil and rock properties and some of the more used testing is then covered. Later chapters show the reliability and correlations that are used to convert that data in the interpretative and assessment phase of the project. The final chapters apply some of these concepts to geotechnical design. This book is intended primarily for practicing geotechnical engineers working in investigation, assessment and design, but should provide a useful supplement for postgraduate courses.

Author: American Association of State Highway and Transportation Officials
Publisher: AASHTO
ISBN: 156051423X
Category : Pavements
Languages : en
Pages : 218

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Author: Asphalt Institute
Publisher:
ISBN: 9781934154175
Category : Asphalt
Languages : en
Pages : 102

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