Download or read book Evaluation of Nondestructive Test Equipment for Airfield Pavements written by Ross A. Bentsen and published by . This book was released on 1989 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Vibratory Testing of Airport Pavements Volume 1 Experimental Test Results and Development of Evaluation Methodology and Procedure written by and published by . This book was released on 1975 with total page 209 pages. Available in PDF, EPUB and Kindle. Book excerpt: Conventional direct sampling methods of airport pavement evaluation interfere with aircraft operations; therefore, an evaluation procedure based on nondestructive vibratory testing was developed. The procedure considers the parameters of pavement thickness and strength, soil strength, landing gear characteristics, and load repetition through correlation of FAA direct sampling procedures with the nondestructive data from termed the dynamic stiffness modulus, which is calculated from a vibratory load-deflection graph. The results indicated the need for standardized vibratory testing equipment, and specifications for a suggested model were written. Evaluation procedures were developed for rigid and flexible pavements which consider the environmental factors of temperature and frost-thaw action, the importance of test locations and quantities, and stabilized layers. Appendix A presents results of two correlations: (a) elastic deflection and pavement performance and (b) dynamic E- modulus and CBR. Appendix B presents the nondestructive testing and performance results on U.S. Army Engineer Waterways Experiment Station test sections and the effects of bound pavement thickness on the nondestructive test results in an attempt to develop overlay design. Appendix C gives procurement specifications for recommended nondestructive test equipment.
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 Nondestructive Testing of Pavements Final Test Results and Evaluation Procedure written by J. W Hall (Jr) and published by . This book was released on 1973 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents results for an investigation to develop techniques of nondestructive evaluation of the load-carrying capacity of airfield pavements. Tests were performed with vibratory equipment on pavements where conventional pavement parameters were also measured. Two evaluation approaches, deflection-extrapolation and stiffness methods, are discussed. The nondestructive stiffness method was found to relate to conventional pavement evaluation criteria. Results of the study showed the reliability of the nondestructive pavement evaluation, and a proposed nondestructive evaluation procedure was developed. The equipment used is described in detail, and recommendations are given for improvements to the equipment. (Author).
Download or read book Nondestructive Testing of Pavements Tests on Multiple Wheel Heavy Gear Load Sections and Eglin and Hurlburt Airfields written by J. W Hall (Jr) and published by . This book was released on 1972 with total page 83 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report presents results of a study to develop techniques using vibratory testing equipment for nondestructive airfield pavement evaluation. Testing was primarily concentrated on the multiple-wheel heavy gear load (MWHGL) flexible and rigid pavement test sections, but some additional tests were performed on prototype pavements at Eglin AFB, Florida, and Hurlburt Airfield, Florida. High-frequency steady-state vibration tests were used to measure shear wave velocity and dynamic moduli of elasticity were computed for each pavement layer. Low-frequency steady-state vibration tests were used to measure dynamic force and deflection on the pavement sections. (Author).
Download or read book Concepts for the Development of a Nondestructive Testing and Evaluation System for Rigid Airfield Pavements written by Paul Thomas Foxworthy and published by . This book was released on 1985 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis develops a complete system for nondestructive testing and evaluation of rigid airfield pavements. An extensive review of present destructive and nondestructive equipment and methodologies is made to form the basis for selection of the equipment and analytical model used in this research. A brief description of the selected Dynatest Model 8000 Falling Weight Deflectometer and the ILLISLAB finite element computer model is presented. Three Air Force installations were chosen for in-depth study of pavement response to FWD loads under a variety of environmental and geological conditions. Techniques are presented to determine the location of maximum damage to rigid pavement slabs for one or any combination of aircraft, and the validity of the calculated stresses is established through comparisons of measured and predicted deflections at joints. Major study findings include: (1) new designations for pavement features based on actual loading conditions, (2) guidelines for planning and conducting large scale evaluations of major airfield systems, (3) a computer-based determination of E and K, (4) joint behavior prediction under fluctuating temperatures and their effect on generated slab stresses, (5) procedures to account for the annual distribution of traffic over the range of temperatures normally experienced at any facility, (6) a simplistic means of estimating total past damage from aircraft operations, and (7) development of computer programs to predict remaining structural life of rigid airfield pavements.
Download or read book Small Aperture Testing for Airfield Pavement Evaluation written by Jim W. Hall and published by . This book was released on 1974 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation Using Nondestructive Testing and Overlay Design written by Hisao Tomita and published by . This book was released on 1983 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Evaluation Procedure for Military Airfields written by Jim W. Hall and published by . This book was released on 1978 with total page 82 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of an Impulse Testing Technique for Nondestructive Testing of Pavements written by John P. Nielsen and published by . This book was released on 1977 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents the results of a study concerned with the evaluation of a proposed technique to perform nondestructive load evaluations of airfield pavements. This technique consists of determining the speed of propagation of the phase velocities through the various layers of a pavement system. A research plan to further develop the technique is also recommended. This plan contains statements of work, equipment recommendations, a proposed budget, and a schedule. (Author).
Download or read book USAF Wave Propagation NDT Method written by J. Amend and published by . This book was released on 1989 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: This paper reviews U.S. Air Force efforts to find a nondestructive testing (NDT) method for evaluating airfield pavement load-carrying capabilities. The paper concentrates its discussion on the wave propagation nondestructive testing method for evaluation of airfield pavements. The method was used by the Air Force from 1983 to 1985. The information given for the wave propagation method includes the theoretical background, test equipment and procedures, methods of test data analysis, and pavement analysis procedures. Also presented are: comparisons of results between the wave propagation NDT and destructive evaluation methods; reasons for the Air Force moving away from the wave propagation method; ongoing research; and possible future use of the wave propagation method.
Download or read book Nondestructive Testing for Light Aircraft Pavements Phase I Evaluation of Nondestructive Testing Devices written by Albert J Bush (III.) and published by . This book was released on 1980 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methodologies have been developed for nondestructive testing (NDT) and evaluation of air carrier airport pavements. This study, a two-phase program, addresses those pavements that are designed to support aircraft with gross weights of less than 30,000 lb. Phase I, reported herein, is to evaluate commercially available NDT devices with respect to operational characteristics, costs, transportability by cargo aircraft, accuracy, and reproducibility of measurements, and suitability for use in evaluating light aircraft pavements. The equipment evaluated included the Benkelman Beam, Dynaflect, Falling Weight Deflectometer, and Models 400, 510, and 2008 Road Raters. The WES 16-kip vibrator was used as a comparison device. Based on the evaluation parameters, the Dynaflect, Model 2008 Road Rater, and Falling Weight Deflectometer are evaluated applicable for testing light aircraft pavements. (Author).
Download or read book Nondestructive Testing for Light Aircraft Pavements written by Albert Jasper Bush and published by . This book was released on 1980 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Methodologies have been developed for nondestructive testing (NDT) and evaluation of air carrier airport pavements. This study, a two-phase program, addresses those pavements that are designed to support aircraft with gross weights of less than 30,000 lb. Phase I, reported herein, is to evaluate commercially available NDT devices with respect to operational characteristics, costs, transportability by cargo aircraft, accuracy, and reproducibility of measurements, and suitability for use in evaluating light aircraft pavements. The equipment evaluated included the Benkelman Beam, Dynaflect, Falling Weight Deflectometer, and Models 400, 510, and 2008 Road Raters. The WES 16-kip vibrator was used as a comparison device.
Download or read book Symposium on Nondestructive Test and Evaluation of Airport Pavement 18 20 November 1975 Vicksburg Mississippi written by Ronald L. Hutchinson and published by . This book was released on 1976 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 22 papers presented included the Federal Government's role in pavement evaluation; the airport operators' and airlines' views on the use of nondestructive evaluation procedures; descriptions of procedures and equipment that have been developed and used in nondestructive testing; results of research under way; and one paper discussing the value of nondestructive testing techniques for pavement evaluation.
Download or read book A Comprehensive System for Nondestructive Testing and Evaluation of Rigid Airfield Pavements written by Paul T. Foxworthy and published by . This book was released on 1986 with total page 41 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 1986 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt:
