Breaking Cracking And Seating Concrete Pavements
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Breaking Cracking And Seating Concrete Pavements
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Author : Marshall R. Thompson
language : en
Publisher:
Release Date : 1989
Breaking Cracking And Seating Concrete Pavements written by Marshall R. Thompson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with categories.
Investigation Of Pavement Cracking On Sr 4 And Demonstration Of The Multi Head Breaker In Fracturing Reinforced Concrete Pavements Before Asphalt Overlay
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Author : Arudi Rajagopal
language : en
Publisher:
Release Date : 2006
Investigation Of Pavement Cracking On Sr 4 And Demonstration Of The Multi Head Breaker In Fracturing Reinforced Concrete Pavements Before Asphalt Overlay written by Arudi Rajagopal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Pavements categories.
This report presents the details of a study conducted by Infrastructure Management and Engineering (INFRAME) to review condition of selected break and seat (B/S) and rubblization projects constructed by Ohio Department of Transportation (ODOT), and also to demonstrate the ability of various pavement breakers to produce desired breaking patterns and fractured particle sizes required by ODOT specifications. A program of field evaluations was undertaken on four test projects. The pavement on SR-4 was rehabilitated in 1993 by breaking the underlying jointed reinforced concrete pavement with a pile hammer prior to constructing an asphalt overlay. The pavement on SR-36 project was rehabilitated in 1992 by rubblizing the existing jointed concrete pavement with a Resonant Pavement Breaker (RPB) and constructing an asphalt overlay. The continuous concrete pavement on I-70 was rubblized in 2005 with a Multi Head Breaker (MHB), in preparation for an initial asphalt overlay. On the I-71 project, MHB was used to demolish the existing jointed reinforced concrete pavement and demonstrate the capabilities of MHB to produce various fracturing patterns. At each test site, a test pit was dug and a visual assessment of the condition of the fractured pavement overlay and subbase/subgrade was made. Measurements were made of the fracturing pattern at the surface of the concrete and gradation tests were performed to determine the particle size distribution at various depths within the fractured slab. Deflection tests were performed to determine the effect of the observed breaking patterns on the stiffness of the pavement layers. Examination of test pit material indicated that the pile hammer used in constructing the B/S sections on the SR-4 project did not provide the vertical through cracking and steel debonding required by the project specifications. Despite this, the overlay on the B/S section provided vastly superior reflection crack performance than the untreated control section. The MHB equipment used on I-70 appeared capable of providing the breaking patterns and particle sizes required by ODOT specifications. However, the MHB equipment used on I-71 by a different contractor did not produce the desired results; a significant amount of large, un-cracked pieces were observed particularly below the reinforcing steel, regardless of desired breaking pattern. On the other hand, the Resonant Pavement Breaker (RPB) equipment used on SR-36 produced fractured particle size distribution and steel debonding required by ODOT specifications. The principal recommendation of the study is to improve ODOT's specifications for fractured slab techniques. On all types of fracturing projects, the quality control requirements need to be modified to require that test pits be more frequently used to ensure that the specified particle size distributions are in fact being achieved throughout the depth of the slab. On rubblize projects, the present particle size distribution requirements need to be re-examined to ensure that the fracturing operation will avoid, not merely delay, reflection cracking in the subsequent overlay.
Effectiveness Of Breaking And Seating Of Reinforced Pcc Pavements Before Overlay
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Author : Issam Minkarah
language : en
Publisher:
Release Date : 1995
Effectiveness Of Breaking And Seating Of Reinforced Pcc Pavements Before Overlay written by Issam Minkarah and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Pavements categories.
Breaking Cracking And Seating Concrete Pavements
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Author : Marshall R. Thompson
language : en
Publisher:
Release Date : 1989
Breaking Cracking And Seating Concrete Pavements written by Marshall R. Thompson and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1989 with Technology & Engineering categories.
This synthesis will be of interest to pavement designers, maintenance engineers, and others interested in reducing reflection cracking of asphalt overlays on portland cement concrete (PCC) pavement. Information is presented on the technique of breaking or cracking of the concrete pavement into small segments before overlaying with asphalt concrete. Asphalt concrete overlays on existing PCC pavements are subject to reflection cracking induced by thermal movements of PCC pavement. This report of the Transportation Research Board discusses the technique of breaking/cracking and seating of the existing PCC before an overlay as a means to reduce or eliminate reflection cracking.
Long Term Monitoring Of Broken And Seated Pavements
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Author : Arudi Rajagopal
language : en
Publisher:
Release Date : 2002
Long Term Monitoring Of Broken And Seated Pavements written by Arudi Rajagopal and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Pavements categories.
This report presents details of a study conducted to evaluate the long term performance of asphalt overlays on broken and seated (B/S) concrete pavements, using field expe riments. The primary purpose of this study is to evaluate the effectiveness of breaking and seating as a reh abilitation strateg y for retarding reflection crac king in asphalt concrete (AC) overlays on jointed reinforced concrete pavements. Test sections were constructed by milling the original AC layer, breaking and seating the concrete slabs and constructing new AC overlays. Control sec tions were co nstructed ad jacent to the B /S sections in the same way, but without breaking the underlying concrete slabs. The test sections carried a large volume of traffic. The original pavements selected in this study were fairly uniform with respect to their structural and surface conditions. Two types of pavement breakers were used in this study, namely guillotine and pile hammer. The extent of breaking was closely monitored. The performance of the test sections was monitored for a total period of nine years. The monitoring data included deflection measurements, crack mapping, a pavement condition surveys and roughness surveys on the original pavement and on the overlay. The results, in general, strongly indicate an improved performance of AC overlays on broken and seated concrete pavements. The B/S treatment has a significant effect on the structural response and behavior of the resulting pavement. Breaking the concrete slabs into smaller pieces resulted in a reduction in the flexural strength, an increase in the surface deflection (50% to 100%), and a decrease in AREA and Spreadability (20 to 30%). Breaking and seating has been extremely effective in delaying and minimizing reflection cracking. Hence, the breaking and seating procedure does indeed result in improved pavement performance. Ultimately, economics and serviceability will govern its use, based on the length of time future maintenance and rehabilitation is deferred.
Reflection Cracking In Bituminous Overlays On Rigid Pavements
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Author : John M. Vyce
language : en
Publisher:
Release Date : 1983
Reflection Cracking In Bituminous Overlays On Rigid Pavements written by John M. Vyce and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1983 with Pavements, Asphalt concrete categories.
Rehabilitation Of Concrete Pavements Utilizing Rubblization And Crack And Seat Methods
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Author :
language : en
Publisher:
Release Date : 2005
Rehabilitation Of Concrete Pavements Utilizing Rubblization And Crack And Seat Methods written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Pavements, Concrete categories.
Deterioration in Portland Cement Concrete (PCC) pavements can occur due to distresses caused by a combination of traffic loads and weather conditions. Hot mix asphalt (HMA) overlay is the most commonly used rehabilitation technique for such deteriorated PCC pavements. However, the performance of these HMA overlaid pavements is hindered due to the occurrence of reflective cracking, resulting in significant reduction of pavement serviceability. Various fractured slab techniques, including rubblization, crack and seat, and break and seat are used to minimize reflective cracking by reducing the slab action. The main objective of this project is to develop a mechanistic-empirical (ME) design aproach for the HMA overlay thickness design for fractured PCC pavements. In this design procedure, failure criteria such as the tensile strain at the bottom of HMA layer and the vertical compressive strain on the surface of subgrade are used to consider HMA fatigue and subgrade rutting, respectively. The developed ME design system is also implemented in a Visual Basic computer program.
The Crack And Seat Method Of Pavement Rehabilitation
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Author : Amy M. Schutzbach
language : en
Publisher:
Release Date : 1988
The Crack And Seat Method Of Pavement Rehabilitation written by Amy M. Schutzbach and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1988 with Pavements categories.
Structural Overlay Strategies For Jointed Concrete Pavements
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Author : Walter P. Kilareski
language : en
Publisher:
Release Date : 1990
Structural Overlay Strategies For Jointed Concrete Pavements written by Walter P. Kilareski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1990 with Pavements, Concrete categories.
Concrete Pavement Crack And Seat Performance And Overlay Design
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Author : Haiming Huang
language : en
Publisher:
Release Date : 1995
Concrete Pavement Crack And Seat Performance And Overlay Design written by Haiming Huang and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Pavements categories.