Download or read book Determination of the Remaining Life of Rigid Airfield Pavement Through Super Accelerated Pavement Testing written by and published by . This book was released on 2004 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt: Determination of remaining life of rigid airfield pavement generally involves a combination of engineering judgment and results of discrete test applications on the pavement and subgrade. Fatigue of pavement is almost never directly observed when examining long-term pavement performance of airfields. Observation and detection of distress and response can assist in assessing the remaining pavement life of in-service rigid pavements. In this study, accelerated pavement testing (APT) was employed to assess the remaining life of Runway 16/34 at Fort Worth Meacham International Airport in Forth Worth, Texas. A traffic model was established using reported Federal Aviation Administration aircraft operations. The pavement response, including the impact of fatigue, was observed under super-accelerated pavement (SAP) testing with input from the established traffic model. Investigation of the pavement consisted of two phases. The first phase involved continuous deflection profiles of the entire runway using the Rolling Dynamic Deflectometer (RDD). From the runway deflection profiles, candidate test locations were selected and tested to determine potential test locations outside of the main runway, as operational constraints prohibited testing of the main runway. A comparison of deflection responses was made between Runway 16/34 and the candidate locations. Three test locations adjacent to Runway 16/34 were selected: Taxiway A6, the South Run-Up area, and the North Run-Up area. The second phase of this study consisted of evaluating the remaining life of the rigid airfield pavement using a reconfigured SAP testing application of the RDD, referred to as the Stationary Dynamic Deflectometer (SDD). Nearly 200,000 applications were applied to three independent test points (center, edge, and corner) at each selected test location. Deflection responses were measured and analyzed, resulting in two principal findings.
Download or read book Significant Findings from Full scale Accelerated Pavement Testing written by Wynand JvdM. Steyn and published by Transportation Research Board. This book was released on 2012 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 433: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes significant findings from the various experimental activities associated with full-scale accelerated pavement testing (f-sAPT) programs that have taken place between 2000 and 2011. The report also identifies gaps in knowledge related to f-sAPT and where future research may be needed. NCHRP Synthesis 433 is designed to expand the f-sAPT base of knowledge documented in NCHRP Syntheses 325 and 235, both with the same title of Significant Findings from Full-Scale Accelerated Pavement Testing. f-sAPT is the controlled application of a wheel loading, at or above the appropriate legal load limit, to a pavement system to determine pavement response in a compressed time period. The acceleration of damage is achieved by one or more of the following factors: increased repetitions, modified loading conditions, imposed climatic conditions, and thinner pavements with a decreased structural capacity which have shorter design lives"--
Download or read book Accelerated Proof tests of Runway Pavement written by Charles R. Foster and published by . This book was released on 1959 with total page 150 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Significant Findings from Full scale Accelerated Pavement Testing written by Frederick Hugo and published by Transportation Research Board. This book was released on 2004 with total page 213 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 325: Significant Findings from Full-Scale Accelerated Pavement Testing documents and summarizes the findings from the various experimental activities associated with full-scale accelerated pavement testing programs.
Download or read book Accelerated Pavement Testing written by Athar Saeed and published by Transportation Research Board. This book was released on 2003 with total page 57 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 A Method for Estimating the Life of Rigid Airfield Pavements written by United States. Army. Corps of Engineers. Ohio River Division Laboratories and published by . This book was released on 1962 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for estimating the life of rigid airfield pavements is presented which is applicable for any ty aircraft traffic on all types of rigid pavement including overlays. The basic concept of the method presented is that any rigid pavement will withstand a certain number of stress repetitions before it cracks. The number of stress repetitions is dependent upon the magnitude of stress which is in turn dependent upon such things as: magnitude of load, gear configuration, traffic distribution, pavement strength, and foundation. All are considered in the method presented; an example of the use of the method is shown as well as three classical examples considering special problems. (Author).
Download or read book Determination of Remaining Flexible Pavement Life written by Matthew W. Witczak and published by . This book was released on 1978 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance of Cracked and Seated Rigid Airport Pavements written by G. R. Rada and published by . This book was released on 1987 with total page 88 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite the growing popularity of the crack and seat technique, little guidance is available for use in evaluating and designing overlays for cracked and seated airfield pavements. Towards solving this problem, a case study was undertaken to compare in-situ characteristics and overlay requirements of three different pavement sections at Suffolk Municipal Airport, Virginia. Nondestructive testing was used to determine the in-situ pavement properties and visual surveys were conducted to assess the condition rating of the pavements. The results of the NDT testing program were used to predict and compare the PCC layer moduli and to design AC overlays. The results of the study indicate that: (1) while the use of the crack and seat technique appears to be effective, reflective cracking is not eliminated: (2) the strength of the PCC layer is significantly reduced after cracking and seating and hence, thicker AC overlays are required and (3) a greater degree of cracking before placing the overlay would have been helpful. The uses of a modified FAA flexible pavement procedure for the design of AC overlays is recommended as an interim procedure. NDT testing as a construction quality control device during breaking of the PCC is also recommended.
Download or read book Rigid Pavement Investigation Study of Exhaust Effects on Airfield Pavements written by United States. Army. Corps of Engineers. Ohio River Division Laboratories and published by . This book was released on 1947 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Accelerated Pavement Testing of Perpetual Pavement Test Sections Under Heavy Aircraft Loading at FAA s National Airport Pavement Test Facility written by Navneet Garg and published by . This book was released on 2020 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six flexible pavements were constructed for construction cycle 7 (CC7) at the Federal Aviation Administration (FAA) National Airport Pavement Test Facility in Atlantic City, New Jersey. Four test sections on the north side measure 200 mm (LFP-4), 250 mm (LFP-3), 300 mm (LFP-2), and 375 mm (LFP-1) that are made of hot mix asphalt (HMA) over an aggregate subbase (thickness varying between 850 and 1,025 mm) resting on a subgrade with a California bearing ratio of 5.5. The fifth test section, LFC-5, is conventional flexible pavement with 125 mm of HMA over aggregate base and subbase, and the LFC-6 structure is the same as LFC-5 except that the crushed stone base layer is replaced with asphalt-stabilized drainable base. The objective of CC7 tests is to develop perpetual pavement design criterion and to validate or refine the fatigue model for HMA in airport pavement thickness design software FAARFIELD. The HMA fatigue model is based on the ratio of dissipated energy change (RDEC). Four fiber optic strain plates were installed to measure transverse and vertical strains at top and transverse strains at bottom within the HMA layer. Full-scale accelerated pavement tests were performed. Traffic test load parameters were six-wheel gear, 245-kN wheel load (gear load 1,470 kN), and 4-kmph speed. Pavement performance was monitored using crack maps, straight edge rut depth, and surface profile measurements. LFC-5 and LFP-4 showed significant fatigue cracks and rutting. LFP-1 and LFP-2 performed well with no signs of cracking. This article presents a discussion on the RDEC fatigue model, pavement thickness design, pavement material characterization test results, pavement instrumentation, accelerated pavement tests under heavy aircraft gear loads, and pavement responses measured using embedded sensors. The test section performance shows that, under loading conditions used in the study, by increasing HMA thickness from 25.4 to 30.5 cm, fatigue cracking was eliminated for the duration of testing (38,000 passes).
Download or read book Determination of Remaining Flexible Pavement Life written by Matthew W. Witczak and published by . This book was released on 1978 with total page 258 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Method for Estimating the Life of Rigid Airfield Pavement written by R. L. HUTCHINSON and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: A method for estimating the life of rigid airfield pavements is presented which is applicable for any ty aircraft traffic on all types of rigid pavement including overlays. The basic concept of the method presented is that any rigid pavement will withstand a certain number of stress repetitions before it cracks. The number of stress repetitions is dependent upon the magnitude of stress which is in turn dependent upon such things as: magnitude of load, gear configuration, traffic distribution, pavement strength, and foundation. All are considered in the method presented; an example of the use of the method is shown as well as three classical examples considering special problems. (Author).
Download or read book Prediction of In Service Fatigue Life of Flexible Pavements Based on Accelerated Pavement Testing written by Runhua Guo and published by . This book was released on 2009 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: Full-scale accelerated pavement testing (APT) is a supplement to typical laboratory procedures. As such, it leads to significant advances in practice and economic savings for the evaluation of new pavement configurations, stress level related factors, new materials, and design improvements. This type of testing closely simulates field conditions; however, it does not capture actual pavement performance because of the limited ability to address long-term phenomena. Therefore, to fully utilize the benefits of APT, there is a need for a methodology to predict the long-term performance of in-service pavement structures based on the generated test results in order to account for such differences. The bias correction factor (BCF) or bias correction functions should account for the quantifiable differences between the fatigue life of the pavement site under APT and the in-service conditions. The BCF represents an improvement of the currently used "shift factors" since they are more general and are based on laboratory testing or computer simulations. By applying the proposed methodology, APT performance results from a structure similar to an in-service structure can be used to perform four-point bending beam tests and structural analysis to obtain an accurate estimate of the necessary BCF to estimate in-service performance.
Download or read book AASHTO Guide for Design of Pavement Structures 1993 written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 1993 with total page 622 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Mechanistic empirical Pavement Design Guide written by American Association of State Highway and Transportation Officials and published by AASHTO. This book was released on 2008 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quality Management of Pavement Condition Data Collection written by Gerardo W. Flintsch and published by Transportation Research Board. This book was released on 2009 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
