Investigation Of Deterioration Of Joints In Concrete Pavements
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Conclusions From The Investigation Of Deterioration Of Joints In Concrete Pavements
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Author : Peter Taylor
language : en
Publisher:
Release Date : 2016
Conclusions From The Investigation Of Deterioration Of Joints In Concrete Pavements written by Peter Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Pavements, Concrete categories.
Premature deterioration of concrete at the joints in concrete pavements and parking lots has been reported across the northern states. The distress may first appear as shadowing when microcracking near the joints traps water, or as cracks parallel to and about 1 inch from the saw cut. The distress later exhibits as a significant loss of material. Not all roadways are distressed, but the problem is common enough to warrant attention. The aim of the work being conducted under this and parallel contracts was to improve understanding of the mechanisms behind premature joint deterioration and, based on this understanding, develop training materials and guidance documents to help practitioners reduce the risk of further distress and provide guidelines for repair techniques. While work is still needed to understand all of the details of the mechanisms behind premature deterioration and the prevention of further distress, the work in this report has contributed to advancing the state of the knowledge.
Investigation Of Deterioration Of Joints In Concrete Pavements
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Author : Peter C. Taylor
language : en
Publisher:
Release Date : 2012
Investigation Of Deterioration Of Joints In Concrete Pavements written by Peter C. Taylor and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Ames (Iowa) categories.
Premature deterioration of concrete at the joints in concrete pavements and parking lots has been reported across the northern states. The distress is first observed as shadowing when microcracking near the joints traps water, later exhibiting as significant loss of material. Not all roadways are distressed, but the problem is common enough to warrant attention. The aim of the work being conducted under this and parallel contracts was to improve understanding of the mechanisms behind premature joint deterioration and, based on this understanding, develop training materials and guidance documents to help practitioners reduce the risk of further distress and provide guidelines for repair techniques. While work is still needed to understand all of the details of the mechanisms behind premature deterioration and prevention of further distress, the work in this report has contributed to advancing the state of knowledge.
Investigation Of Deterioration Of Joints In Concrete Pavements
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Author : Lawrence L. Sutter
language : en
Publisher:
Release Date : 2016
Investigation Of Deterioration Of Joints In Concrete Pavements written by Lawrence L. Sutter and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with Pavements, Concrete categories.
The objective of this research was to assess the efficacy of various waterproofing sealers applied to pavement joints with respect to limiting water ingress. The measure of water ingress was the chloride concentration profile as measured by scanning electron microscopy and energy dispersive spectroscopy. The fieldwork was conducted at the MnROAD facility. Cores were retrieved from pavements to assess the before condition. Various silane- and siloxane-based sealers were applied in 2013, and the pavements were exposed to service for two years. After two years, cores were retrieved. The chloride profiles for various pavement sites were compared before and after application of the sealer. No appreciable differences were noted. The lack of measured differences is attributed to the short time span allowed for ingress. The older pavements measured had a considerable degree of chloride ingress and, as such, small changes were difficult to detect. The newer pavement analyzed also showed no appreciable change, but it would be worth re-analyzing after more time has elapsed (e.g., two more years).
Synthesis
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Author : Jason Weiss
language : en
Publisher:
Release Date : 2019-05
Synthesis written by Jason Weiss and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-05 with categories.
Distress has recently been observed in the joints of some concrete pavements, primarily in the wet-freeze states. This distress often begins in longitudinal joints, followed by transverse joints and results in the significant loss of material from the joint area. Although it may only affect approximately 10% of the concrete pavements system-wide, it greatly reduces the service life and increases maintenance costs of the pavements it effects. Primary issues that emerged from studies on this phenomenon include the importance of the timing of joint sawing, the width of the joint opening, degree of concrete or joint sealing, drainage and degree of saturation of the concrete at the joint, quality of the air void system, role of deicing chemicals, quality of curing, and the degree of restraint at the joint. Although this broad collection of issues implies that we still lack complete understanding of all causes of joint deterioration, it also makes it pretty clear that the observed damage is a result of combination of several factors. This study synthesizes completed research related to concrete pavements joint deterioration and provides information to advance the knowledge and understanding of the variables involved in in this deterioration process and suggests the best practices that can lead to its reduction or mitigation.
Investigation Of Premature Distress Around Joints In Pcc Pavements Parts I Ii
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Author : Maria Del Mar Arribas-Colon
language : en
Publisher: Purdue University Press
Release Date : 2012-12-31
Investigation Of Premature Distress Around Joints In Pcc Pavements Parts I Ii written by Maria Del Mar Arribas-Colon and has been published by Purdue University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-31 with Transportation categories.
Some of the Indiana concrete pavements constructed within the last 10-20 years have shown signs of premature deterioration, especially in the areas adjacent to the longitudinal and transverse joints. This deterioration typically manifested itself as cracking and spalling of concrete combined with the loss of material in the direct vicinity of the joint. In addition, in some cases "bulb-shaped" damage zones were also observed under the sealed parts of the joints. The objective of this study was to investigate possible causes of this premature deterioration. To reach this objective, the characteristics of the concrete in and near the deteriorated joints were compared and contrasted to the concrete characteristics in the non-deteriorated sections of pavement. The study was conducted in two different phases (Phase I and Phase II), and the findings are presented as a two-part report. The investigation started with a detailed inventory of selected areas of affected pavements in order to identify and classify the existing types of distresses and select locations for collection of the cores. During the Phase I of the study a total of 36 concrete cores were extracted from 5 different pavements.. During Phase II of the study a total of 18 cores were retrieved from five different pavement sections and subject to examination. The cores were subjected to eighth different tests: air-void system determination, Scanning Electronic Microscopy (SEM) analysis, X-ray diffraction (XRD) analysis, sorptivity test, freeze-thaw & resonance frequency test, resistance to chloride ion penetration (RCP) test and chloride profile (concentration) determination. The test results identified several cases of in-filling of the air voids (especially smaller air bubbles) with secondary deposits. These deposits were most likely the result of the repetitive saturation of air voids with water and substantially reduced the effectiveness of the air voids system with respect to providing an adequate level of freeze-thaw protection. Specifically, it was observed that the existing air void system in the concrete from panels near the deteriorated longitudinal joint had neither spacing factors nor specific surface values within the range recommended for freeze-thaw durability. Contrary to this, nearly all the concrete in lanes without damage had an adequate air void system at the time of sampling. In addition, the affected concrete often displayed an extensive network of microcracks, had higher rates of absorption and reduced ability to resist chloride ions penetration. From the observation of the drains performed using the remote camera it was obvious that not all the drains were functioning properly and some were entirely blocked. However, more precise or direct correlations could not be made between the conditions of the drains and observed pavement performance.
Investigation Of Joint Deterioration In Mnroad Phase 1 Jointed Concrete Pavement Test Sections
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Author : Ryan J. Rohne
language : en
Publisher:
Release Date : 2010
Investigation Of Joint Deterioration In Mnroad Phase 1 Jointed Concrete Pavement Test Sections written by Ryan J. Rohne and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Pavements, Concrete categories.
An Overview Of Joint Deterioration In Concrete Pavement
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Author : Wesley Jones
language : en
Publisher:
Release Date : 2013-12-31
An Overview Of Joint Deterioration In Concrete Pavement written by Wesley Jones and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-12-31 with categories.
Concrete pavements represent a large portion of the transportation infrastructure. While the vast majority of concrete pavements provide excellent long-term performance, a portion of these pavements have recently shown premature joint deterioration. Substantial interest has developed in understanding why premature joint deterioration is being observed in jointed portland cement concrete pavements (PCCP). While some have attributed this damage to insufficient air void systems, poor mixture design, or chemical reaction between the salt and the paste, it is the hypothesis of this work that a component of this damage can be attributed to fluid absorption at the joints. This report begins by discussing the importance of the level of concrete saturation on freeze-thaw damage. Second, this report describes the influence of deicing salt solutions on drying and wetting of concrete. Third, the report describes some observations from field studies. Fourth, the report discusses soy methyl esters polystyrene blends (SME-PS) as a potential method to extend the service life of concrete pavements by limiting the ingress of salt solutions. The report also discusses field application of the SME-PS blends for field investigation. Finally, the report discusses the development of a test to assess chloride solution ingress during temperature cycling. The aim of this work is to provide background on some aspects that can lead to joint deterioration and to provide the pavement community alternatives on how sealers and deicers may be able to be used more efficiently to reduce joint damage.
Concrete Resurfacing Of Concrete Pavement In Various Stages Of Deterioration
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Author : D. E. Gotham
language : en
Publisher:
Release Date : 1954
Concrete Resurfacing Of Concrete Pavement In Various Stages Of Deterioration written by D. E. Gotham and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1954 with Pavements, Concrete categories.
Value Engineering Study Of Pavement Joint Repair
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Author :
language : en
Publisher:
Release Date : 1980
Value Engineering Study Of Pavement Joint Repair written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Concrete roads categories.
Failure And Repair Of Continuously Reinforced Concrete Pavement
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Author : National Research Council (U.S.). Transportation Research Board
language : en
Publisher: Transportation Research Board National Research
Release Date : 1979
Failure And Repair Of Continuously Reinforced Concrete Pavement written by National Research Council (U.S.). Transportation Research Board and has been published by Transportation Research Board National Research this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Technology & Engineering categories.
The performance of CRCP has revealed a number of failure modes that are traceable to design, construction, materials, and maintenance deficiencies and such other factors as environemntal conditions and traffic loadings. This report of the Transportation Research Board includes a review of the cumulative experiences of state that have constructed and maintained CRCP. Guidelines for repair techniques are included, and areas of needed research are identified.