Cost Effective Prevention of Reflective Cracking in Composite Pavements PDF Download

Author: Mostafa Elseifi
Publisher:
ISBN:
Category : Pavements, Composite
Languages : en
Pages : 110

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Author: Mostafa A. Elseifi
Publisher:
ISBN:
Category :
Languages : en
Pages : 2

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Book Description
Reflection cracks are caused by discontinuities (cracks or joints) in underlying layers, which propagate through a hot-mix asphalt (HMA) overlay due to continuous movement at the crack prompted by thermal and traffic loading. If the new overlay is bonded to the distressed layer, cracks in the existing pavement usually propagate to the surface within one to five years and even as early as few months have been reported. Excessive seasonal temperature variations and movements of a cement-treated base layer may also result in shrinkage cracking, which extends to the pavement surface to cause reflection block cracks. Reflection cracking leads to premature failure of overlays by allowing water infiltration through the cracks, which cause stripping in HMA layers and weakening and deterioration of the base and/or subgrade. Since the early 1930s, considerable resources and efforts have been spent to find new and relatively inexpensive techniques to delay reflection cracking. Different methods, including the use of interlayer systems (e.g., glassgrid, stress absorbing membranes, paving fabrics, etc.) and rubblization, have been suggested for enhancing pavement resistance to reflective cracking. Experimental investigations of these crack control treatments indicate that their performances have been mixed and cannot be considered conclusive. Louisiana has experience with various techniques and treatments to control reflection cracking since the 1970s; however, the cost-effectiveness and performance of these methods have not been reliably evaluated. In addition, scientific evaluation and testing of these treatment methods was not performed on many projects. To ensure successful control of this distress and effective allocation of maintenance funds, there is a critical need to assess the performance of pavement sections across the state built with various treatment methods and to determine the most cost-effective techniques to delay or to prevent reflection cracking in composite pavements.

Author: Mostafa Elseifi
Publisher:
ISBN:
Category :
Languages : en
Pages : 2

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Book Description
Refl ection of cracks in hot mix asphalt (HMA) overlays represents a serious challenge associated with pavement rehabilitation. Since the early 1930s, considerable resources and eff orts have been spent to fi nd new and relatively inexpensive techniques to delay refl ection cracking. Diff erent methods, including the use of interlayer systems, have been suggested for enhancing pavement resistance to refl ection cracking. Experimental investigations in the early 1980s showed that interlayer systems might be used to delay or to prevent the refl ection of cracks through a new overlay placed over an old cracked pavement. Louisiana experimented with various techniques and treatments to control refl ection cracking since the 1970s; however, the performance and cost-eff ectiveness of these methods were not evaluated in many projects. Performance and economical assessments of these various treatment methods present a critical need to ensure successful control of this distress and eff ective use of available funds. Therefore, it is necessary to analyze various pavements across the state in which these treatments were used to establish the performance and cost eff ectiveness of these crack control methods.

Author: Rakesh Bandaru
Publisher: LAP Lambert Academic Publishing
ISBN: 9783848422388
Category :
Languages : en
Pages : 136

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Book Description
Louisiana had experimented with various techniques and treatments to control reflection cracking since the 1970s; however, the cost-effectiveness and performance of these methods had not been reliably evaluated. In addition, scientific evaluation and testing of these treatment methods was not performed on many projects. To ensure successful control of this distress and effective allocation of maintenance funds, there is a critical need to assess the performance of pavement sections across the state built with various treatment methods and to determine the most cost-effective techniques to delay or to prevent reflection cracking in composite pavements. The objective of this study is to evaluate and compare different reflection cracking control treatments by evaluating the performance, constructability, and cost-effectiveness of pavements built with these treatments across the state.To achieve this objective, a survey of current state practices identified the treatment methods that are used or that had been used to delay and mitigate reflection cracking in composite pavements.

Author: A. Vanelstraete
Publisher: CRC Press
ISBN: 0203627237
Category : Architecture
Languages : en
Pages : 136

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Crack reflection through a road structure is one of the main causes of premature pavement deterioration. This is a widespread problem in many countries and highway maintenance authorities are having to find economic means of repairing and upgrading their pavements. This book is the eagerly awaited state-of-the-art report which considers all different aspects of the subject including assessment and use of overlay systems.

Author: Harikrishnan Nair
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 37

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Book Description
Propagation of cracks from existing pavements into a new asphalt concrete overlay (reflective cracking) is a major problem for both rigid and flexible pavements. Reflective cracking in pavements compromises ride quality and reduces the service life of the pavement. Reflective cracking of the asphalt layer over jointed concrete pavement is a perennial problem in Virginia and elsewhere. State transportation agencies continue to try various available treatment methods to delay or prevent reflective cracking with corrective or restorative maintenance. Some of those treatments include using paving fabric as an interlayer. Virginia has anecdotal experience with paving fabric interlayers, but little well-documented history with which to assess performance. The objective of this study was to establish a performance baseline for fabric interlayers in conjunction with asphalt concrete overlays on existing flexible, rigid, and composite pavements by documenting the installation and initial field performance of several projects in Virginia. Two types of interlayer fabric were used. One of the interlayers needed an asphalt leveling course for placement based on the manufacturer's specifications. As expected, all of the sections with interlayers are performing well. However, most of the sections were placed in 2017 and 2018, and hence the performance data are preliminary. These sections need to be monitored continuously to track pavement distress and performance over time. The cost of using interlayers in pavement ranged from 6 .0 dollars to 8 .0 dollars per square yard, depending on the type of fabric and installation method. Long-term performance data are needed to assess the benefit-cost effectiveness of using paving fabric interlayers in pavements.

Author: William G. Buttlar
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 192

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The Illinois Department of Transportation (IDOT) spends two million dollars annually on reflective crack control treatments; however, their cost-effectiveness has never before been reliably determined. The study evaluated the cost-effectiveness of IDOT reflective crack control system "A", which consists of a non-woven, polypropylene paving fabric, placed either in strips longitudinally over lane-widening joints or over the entire pavement ("area" treatment). Performance of 52 projects across Illinois was assessed through crack mapping and from distress and serviceability data in IDOT's Condition Rating Survey (CRS) database. Comparisons of measured reflective cracking in treated and control sections revealed that system "A" retards longitudinal reflective widening crack development, but does not significantly retard transverse reflective cracking. However, both strip and area applications of these fabric treatments appeared to improve overall pavement serviceability, and were estimated to increase rehabilitation life spans by 1.1 and 3.6 years, respectively. Life-cycle cost analyses (LCCA) found strip and area reflective crack control treatments to be marginally cost effective, where a 4.5% reduction in life-cycle costs was estimated, for medium-sized projects [between 1 and 6 mi (1.6 and 9.7 km) of two-lane road]. Small projects [under 1 mi (1.6 km) of two-lane road] showed a breakeven level of cost-effectiveness, while large projects [over 6 mi (9.7 km) of two-lane road] showed a 6.2% savings in life-cycle costs. Permeability testing of field cores taken over transverse joints showed that waterproofing benefits can exist after reflective crack appearance, which explains why serviceability was improved with area treatment even though crack development was not retarded. Guidelines for establishing and monitoring future experimental sections were also developed.

Author: Donald N. Geoffroy
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 116

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Book Description
This synthesis will be of interest to highway agency executive management including administrative, budget, and finance personnel; pavement design, construction, and maintenance engineers; and maintenance operations personnel, including supervisors and maintenance crew leaders. This synthesis describes the state of the practice with respect to setting a coherent strategy of cost-effective preventive maintenance for extending pavement life. This report of the Transportation Research Board describes the practices of state, local, and provincial transportation agencies that are attempting to minimize the life-cycle costs of pavements and are identifying, during the design of the pavement rehabilitation, reconstruction, or construction projects, the future preventive maintenance treatments and the timing and funding for those treatments. It includes a review of domestic literature and a survey of current practices in North America. The appendices include a primer on pavement design and construction, the benefits of preventive maintenance of pavements, a summary of the questionnaire data collected, a simulation of pavement management strategies, and an example process to demonstrate the cost- effectiveness of preventive maintenance.

Author: Imad L. Al-Qadi
Publisher: CRC Press
ISBN: 0203882199
Category : Technology & Engineering
Languages : en
Pages : 932

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Book Description
Internationally, much attention is given to causes, prevention, and rehabilitation of cracking in concrete, flexible, and composite pavements. The Sixth RILEMInternational Conference on Cracking in Pavements (Chicago, June 16-18, 2008) provided a forum for discussion of recent developments and research results.This book is a collection of papers fr

Author: Imad L. Al-Qadi
Publisher:
ISBN:
Category : Pavements
Languages : en
Pages : 52

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