Determination of Insitu Material Properties of Asphalt Concrete Pavement Layers from Nondestructive Tests

Determination of Insitu Material Properties of Asphalt Concrete Pavement Layers from Nondestructive Tests
Author: Amir Naoum Hanna
Publisher:
Total Pages: 8
Release: 2002
Genre: Nondestructive testing
ISBN:

This digest summarizes the findings from the final report on NCHRP Project 10-44A, 'Determination of Insitu Material Properties of Asphalt Concrete Pavement Layers, ' conducted by Applied Research Associates, Inc. It was prepared by Dr. Amir N. Hanna ... from the contractor's final report authored by Dr. Athar Saeed and Dr. Jim W. Hall, Jr., who served as principal investigator.

Nondestructive Testing of Pavements and Backcalculation of Moduli

Nondestructive Testing of Pavements and Backcalculation of Moduli
Author: Shiraz D. Tayabji
Publisher: ASTM International
Total Pages: 534
Release: 2000
Genre: Materials
ISBN: 0803128584

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

Non-Destructive Estimation of Pavement Thickness, Structural Number and Subgrade Resilience Along INDOT Highways

Non-Destructive Estimation of Pavement Thickness, Structural Number and Subgrade Resilience Along INDOT Highways
Author: Samy Noureldin
Publisher:
Total Pages:
Release: 2005-05-01
Genre: Transportation
ISBN: 9781622602520

Nondestructive testing has become an integral part for evaluation and rehabilitation strategies of pavements in recent years. Pavement evaluation employing the Falling Weight Deflectometer (FWD) and the Ground Penetrating Radar (GPR) can provide valuable information about pavement performance characteristics and be a very useful tool for project prioritization purposes and estimation of construction budget at the network level. FWD deflection testing is an accurate tool for determining pavement structural capacity and estimating the required thickness of overlays and hence is an accurate tool for planning for or estimating required current and future construction budgets. GPR is the only tool that a highway agency may use to develop an inventory of pavement layers thicknesses in the most efficient manner possible. By estimating pavement layer thicknesses and stiffness properties more reliable projections of network rehabilitation strategies and needs can be established, thus resulting in cost effective use of available funds. Traditional obstacles for the use of FWD and GPR in pavement evaluation at the network level used to be expenses involved in data collection, limited resources and lack of simplified analysis procedures. This report presents Indiana experience in pavement evaluation with the FWD and GPR at the network level.

Measuring in Situ Mechanical Properties of Pavement Subgrade Soils

Measuring in Situ Mechanical Properties of Pavement Subgrade Soils
Author: David E. Newcomb
Publisher: Transportation Research Board
Total Pages: 84
Release: 1999
Genre: Science
ISBN: 9780309068574

This synthesis report will be of interest to pavement and geotechnical design and research engineers, geologists and engineering geologists, and related laboratory personnel. It describes the current practice for measuring in situ mechanical properties of pavement subgrade soils. The tests conducted to measure the mechanical properties of soil strength and stiffness are the primary topics, and these are discussed in the context of design procedures, factors affecting mechanical properties, and the variability of measurements. Information for the synthesis was collected by surveying U.S., Canadian, and selected European transportation agencies and by conducting a literature search. This TRB report provides information on existing and emerging technologies for static and dynamic, and destructive and nondestructive testing for measuring in situ mechanical properties of pavement subgrade soils. Correlations between in situ and laboratory tests are presented. The effects of existing layers on the measurement of subgrade properties, and soil spatial and seasonal variability are discussed. Most importantly, the use of soil properties in pavement design and evaluation are explained. New applications or improvements to existing test methods to support the use of mechanistic/stochastic-based pavement design procedures are also explained.