Download or read book Testing Program for the Falling weight Deflectometer written by M. Makbul Hossain and published by . This book was released on 1995 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of the Falling Weight Deflectometer written by Ronald Netemeyer and published by . This book was released on 1997 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Falling Weight Deflectometer Usage written by Sirous H. Alavi and published by Transportation Research Board National Research. This book was released on 2008 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.

Download or read book Assessing the Precision of Falling Weight Deflectometer for Field Measurements written by B. Choubane and published by . This book was released on 2006 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Deflection-based techniques are being widely used to evaluate the structural integrity and for estimating the elastic moduli of in-service pavements. These deflections can be non-destructively induced and measured using various commercially available devices. In recent years, the Falling Weight Deflectometer (FWD) has gained worldwide acceptance among most highway agencies due to its versatility and ease of use. However, as with any testing using subject-driven, instrumented devices, the major concerns of the end usefulness of the resulting data are accuracy and precision. Although a level of uncertainty is always inherent to any measurement process, it must also be appropriately quantified or assessed. Therefore, the Florida Department of Transportation initiated the present field study to assess the level of precision of FWD measurements on flexible pavements. Deflection data were acquired using three FWD units concurrently on four different asphalt pavement sections. The precision was then addressed in terms of testing repeatability and reproducibility. In addition, the effects of buffer designs on deflection measurements were also evaluated. This paper presents a description of the testing program, data collection efforts, and subsequent analyses and findings. Precision statements for repeatability and reproducibility of field measurements were developed and are summarized herein. A generally high level of repeatability and reproducibility of the deflection measurements is demonstrated.

Download or read book Nationally Coordinated Program of Highway Research Development and Technology Annual Progress Report Fiscal Year 1994 written by and published by . This book was released on 1995 with total page 168 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Special Report written by and published by . This book was released on 1996 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Falling Weight Deflectometer FWD Test Information I 75 Sarasota Manatee Counties written by Florida. Bureau of Materials and Research and published by . This book was released on 1984 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Albert Jasper Bush and published by ASTM International. This book was released on 1989 with total page 701 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials and published by ASTM International. This book was released on 1994 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of June 1993 international symposium held in Atlanta, Georgia, called specifically to develop and standardized evaluation procedures for non-destructive methods of testing pavements. The 29 papers discuss analytical models and techniques, measurement and calculation techniques in the field and laboratory, problems and errors associated with backcalculation methods and design parameters, and testing for other pavement uses. Also includes a history of the quest for a standard and the status of that effort. Reproduced from typescripts. Annotation copyright by Book News, Inc., Portland, OR

Download or read book Comparison of the Falling Weight Deflectometer with Other Deflection Testing Devices written by Olle Tholén and published by . This book was released on 1985 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non destructive Testing written by and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Non-destructive testing of pavement structures can be achieved by accurately measuring and interpreting deflection data. this paper describes a computer program designed for simple and fast processing of deflection data collected using a falling weight deflectometer (fwd). a set of diagnostic parameters are calculated: first, maximum horizontal strain in the asphalt concrete (ac) under the test load, directly via the corresponding maximum curvature; next, the elastic stiffness (or young's modulus) of the subgrade; and finally, the vertical stress, strain and deflection on top of the subgrade, by means of an improved method of equivalent layer thickness. the actual stresses, strains, and deflections at test conditions can be normalized for standard ac temperature and standard test load. diagnostic and design applications are discussed. comparisons are made with parallel elastic layer analysis computations. for the covering abstract of the conference see irrd 807201.

Download or read book Falling Weight Deflectometer Relative Calibration Analysis written by and published by . This book was released on 1993 with total page 31 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nondestructive deflection testing with Falling Weight Deflectometers (FWDs) is a critical element of the pavement monitoring effort for the Long-Term Pavement Performance (LTPP) testing of the Strategic Highway Research Program. The deflection testing must be conducted consistently and with accurately calibrated FWDs. This is a report of the FWDCAL software, which was developed to help ensure that. One aspect of this is the monthly relative calibration of the FWD deflection measurement system. The details are described of how a data set is obtained which can be analyzed to (1) determine a multiplier for each sensor; and statistically partition the measurement errors in the data to the major sources of error, as a check on the acceptability of the calibration data. The FWDCAL software is described which was developed to perform these analyses.

Download or read book Falling weight Deflectometer Study written by Reed B. Freeman and published by . This book was released on 2001 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Advances in Transportation Geotechnics IV written by Erol Tutumluer and published by Springer Nature. This book was released on 2021-09-16 with total page 1059 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume presents selected papers presented during the 4th International Conference on Transportation Geotechnics. The papers address the geotechnical challenges in design, construction, maintenance, monitoring, and upgrading of roads, railways, airfields, and harbor facilities and other ground transportation infrastructure with the goal of providing safe, economic, environmental, reliable and sustainable infrastructures. This volume will be of interest to postgraduate students, academics, researchers, and consultants working in the field of civil and transport infrastructure.

Download or read book Backcalculation of layer parameters for LTPP test sections written by and published by DIANE Publishing. This book was released on with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pavement Analysis written by Per Ullidtz and published by . This book was released on 1987 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides some simple methods for the analysis of pavements in order to describe their present condition and to predict their future condition. Functional and structural conditions of flexible and rigid highway and airfield pavements are treated.

Download or read book Nondestructive Testing of Pavements and Backcalculation of Moduli written by Shiraz D. Tayabji and published by ASTM International. This book was released on 2000 with total page 534 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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