Evaluation of Nondestructive Test Equipment for Airfield Pavements PDF Download
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Author: Ross A. Bentsen
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 350
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Author: Ross A. Bentsen
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 350
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 209
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Book Description
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.
Author: Albert Jasper Bush
Publisher: ASTM International
ISBN: 0803112602
Category : Kaldırımlar-Deneme
Languages : en
Pages : 701
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Author: J. W Hall (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 83
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Book Description
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).
Author: ASTM Committee D-18 on Soil and Rock. Subcommittee D-4 on Road and Paving Materials
Publisher: ASTM International
ISBN: 0803118651
Category : Fatigue
Languages : en
Pages : 528
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Book Description
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
Author: J. W Hall (Jr)
Publisher:
ISBN:
Category :
Languages : en
Pages : 83
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Book Description
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).
Author: Paul Thomas Foxworthy
Publisher:
ISBN:
Category : Pavements, Concrete
Languages : en
Pages : 516
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Book Description
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.
Author: Jim W. Hall
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 44
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Author: Hisao Tomita
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 128
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Author: Jim W. Hall
Publisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 82
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