Recommended Practices For Crack Sealing Hma Pavement
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Author | : Eddie Johnson |
Publisher | : |
Total Pages | : 5 |
Release | : 2008 |
Genre | : Pavements, Asphalt concrete |
ISBN | : |
This report is intended to present the conclusions from LRRB 822 Tasks 1-3 in combination with several other pertinent sources including: Chapter 4 of the Best Practices Handbook on Asphalt Pavement Maintenance (2000-04), the Guidelines for Sealing and Filling Cracks in Asphalt Concrete Pavement - Best Practice by the National Guide to Sustainable Municipal Infrastructure (NRC-CNRC, 2003), and Special Provision 2331, Bituminous Pavement Crack Treatment (Mn/DOT-Revised 2/7/2008).
Author | : |
Publisher | : |
Total Pages | : 102 |
Release | : 2014 |
Genre | : Pavements |
ISBN | : |
Crack sealing and filling on hot mix asphalt (HMA) pavements are cost-effective pavement preservation techniques that improve pavement performance and extend the life of existing pavements. If performed in a timely and effective manner, crack sealing can extend the life of HMA pavements. CDOT sponsored this study to update its procedures and guidelines for crack sealing and filling of HMA pavements. The draft Guidelines included in this report reflect CDOT experience, current state-of-the-practice, and the most recent research findings, and address where and when to perform crack sealing and filling, material selection, installation methods, construction inspection, and follow-up evaluation.
Author | : Jusang Lee |
Publisher | : |
Total Pages | : |
Release | : 2015-12-31 |
Genre | : |
ISBN | : 9781622603824 |
This study investigated the current state of practice for crack sealing/filling. In addition, the INDOT crack sealing/filling practice was experimentally evaluated for the effectiveness of crack sealing/filling, the effectiveness of routing, the performance of the different types of crack sealants and fillers, the validity of sealant performance grade system, and the crack sealing/filling equipment performance. The key findings from an extensive literature review and nationwide/statewide survey performed in 2012 are the following: (1) 65% of the responses indicated that the routing is required for the crack sealing/filling application; (2) ASTM D 6690 Type II was the most widely used sealant type and only Missouri and Indiana included emulsions in their specifications as crack sealing/filling materials; and (3) crack sealing/filling equipment availability and their maintenance were the biggest concerns.Based on the two-year experimental investigation, the crack sealing/filling was determined to be effective in preventing the occurrence of pavement surface crack distress. The crack sealing/filling was concluded to be effective in maintaining crack integrity and resisting sealant and filler deformations due to the seasonal crack movement. The routing was not determined to be effective in terms of the pavement performances. However, Adhesive/Cohesive/Spalling (ACS) failure results showed that the routed sections significantly outperformed the non-routed sections. In addition, the test results indicated that the ASTM 6690 Type II crack sealants performed relatively well in terms of pavement and crack performance. The correlation between the sealant performance grades and the pavement and crack performances with different types of sealants and fillers were poor and insignificant.The experimental results showed that the cracks on wet pavement treated with HAL had significantly higher bonding between the materials and asphalt pavement surface than the cracks treated with the conventional air compressor. Therefore, the incorporation of a hot air lance in the wet condition is recommended to extend the operable time and seasonal availability for crack filling and sealing construction (2070 and 2090 Activities).
Author | : Dale S. Decker |
Publisher | : |
Total Pages | : 37 |
Release | : 2014 |
Genre | : Pavements, Asphalt |
ISBN | : 9780309307932 |
"TRB's National Cooperative Highway Research Program (NCHRP) Report 784 presents best practices for crack treatments for asphalt pavements developed through a critical review of the current states of the art and practice."--Publisher description.
Author | : Michael C. Belangie |
Publisher | : |
Total Pages | : 130 |
Release | : 1981 |
Genre | : Pavements |
ISBN | : |
The primary purpose of this study was to develop criteria to improve the effectiveness of Utah's flexible pavement crack sealing practice. The methodology involved field measurements of seasonal variation in crack width and in-depth interviews of Department members at various levels of management in maintenance, materials, construction, and research. Other states were queried by questionnaire in order to obtain a comparative base on with to evaluate Utah's practice. Findings indicate that flexible pavement cracking is a significant problem in the Far West, Rocky Mountains, Great Lakes, and New England. Criteria to determine when to seal (fill) cracks, and materials or techniques to be used vary widely. Choice of materials if affected by storage requirements and equipment available. Prepackaging of materials especially designed for crack sealing has resulted in improvements in control of mix and material properties; further gains can be anticipated as mix design improves and material specifications become more exact.. Low temperature and freeze thaw cycles significantly affect the amount of thermal cracking and the performance of crack sealant. Poor rideability, increased pavement deterioration, obscured traffic markings, lowered skid resistance can result from inappropriate selection and installation of crack sealants. Ductile sealants such as Crumb rubber/asphalt cement mixes, in combination with routing appear to offer substantial gains in sealant life and performance. These gains are partially offset by increased installation cost and hazard to the operator. Existing data is insufficient for benefit/cost analysis.
Author | : Michael C. Belangie |
Publisher | : |
Total Pages | : 86 |
Release | : 1985 |
Genre | : Pavements, Asphalt |
ISBN | : |
This study used over forty-four lane miles of test site to gather up to three years of comparative performance data on thirteen crack sealants. The data indicates that the more durable, high ductility materials when applied in a band-aid configuration can be expected to give significantly better performance than the lower ductility materials used by the Utah DOT prior to 1983. Evaluation of sealant placement procedures indicates that routing is a questionable practice, and that the hot compressed air lance may significantly improve the performance of materials placed during cold or wet conditions. Evaluation of UDOT maintenance activities indicates that sealant melters cannot achieve or maintain the required sealant application temperatures under colder winter conditions. The efficiency of melter units should be improved or not operated under those conditions. More accurate temperature gauges on melter units should be acquired. Inaccurate gauges may cause impaired sealant performance and safety.
Author | : Anthony P. Mullin |
Publisher | : |
Total Pages | : 296 |
Release | : 2016 |
Genre | : Pavements, Asphalt concrete |
ISBN | : |
Thermal cracking is one of the most prevalent asphalt concrete (AC) pavement distresses in northern states and countries. Every year in Alaska, a substantial amount of funding is spent on sealing cracks according to the practices of the Alaska Department of Transportation and Public Facilities (ADOT&PF) Maintenance and Operations (M&O) division. However, to date there are no specific guidelines available that clearly outline the best timing for crack sealing or even what conditions necessitate crack sealing in a consistent manner. There is a need to evaluate the effectiveness and best practices for using the crack sealing techniques on AC pavements in Alaska. In response to this research need, a pavement preservation project was conducted and found that although crack sealing is a very common practice in Alaska, it is unclear how and why M&O decides to seal cracks since some are sealed and some are not. This motivated further evaluation of 91 field sections that represent the various climate regions of Alaska. A new survey method, “special thermal crack evaluation (STCE) ”, was developed to answer critical questions related to road thermal cracks and to provide guidance for crack sealing practices. The new STCE method was conducted along with two other field survey methods, the Long Term Pavement Performance (LTPP) program and the Pavement Surface and Evaluation Rating (PASER). Results between methods were then correlated. Finally, regression analyses were conducted to determine factors that significantly influence crack development and crack sealing practices in Alaska. Significant influencing factors on crack development include pavement temperature, freezing index, and rut depth. Crack frequency, freezing index, pavement age, PASER rating, PASER transverse crack severity level, and certain STCE questions can significantly contribute to the decision making for current sealing practices. It was found that the STCE method could generate direct recommendations on crack sealing practices. STCE, in combination with the LTPP and PASER methods, provides specific analysis about asphalt thermal cracking and sealing of these cracks so that informed decisions can be made for a positive impact on ADOT&PF’s maintenance budget. It is recommended to use STCE along with the LTPP and PASER methods and to use the findings of influencing factors of this study to develop more specific plans for future crack sealing practices.
Author | : David W. Janisch |
Publisher | : |
Total Pages | : 68 |
Release | : 1996 |
Genre | : Pavements |
ISBN | : |
The practice of sawing and sealing joints in pavements is not a new one. In fact, it is common practice in the construction of jointed Portland Cement Concrete (PCC) pavements. The idea of sawing and sealing joints in bituminous pavements is much less endorsed by those responsible for the construction and maintenance of hot mix asphalt (HMA) pavements. Minnesota began experimenting with sawing joints in HMA pavements in the late 1960s. Since then more than 50 test sections have been constructed throughout the State. Test sections include HMA overlays of Jointed Concrete Pavement, HMA overlays of HMA pavements and newly constructed HMA pavements. his study involved a review of these test sections, identifying any problems associated with the saw and seal procedure, and gives recommendations for its use in Minnesota.
Author | : Robert A. Eaton |
Publisher | : |
Total Pages | : 28 |
Release | : 1992 |
Genre | : Pavements |
ISBN | : |
A survey of all 50 United States was conducted in September of 1990 to determine the state of the art of crack sealing procedures on flexible asphalt concrete pavements. The results were tabulated and a summary report prepared. A meeting was held at the U.S. Army Cold Regions Research and Engineering Laboratory to discuss the draft report; the comments and suggestions received were incorporated into this report. At the meeting the group identified the need for a trade organization to develop uniform specifications and terminology and to promote proper equipment, methodology, materials, training and education in the pavement crack sealing industry.
Author | : Dale E. Peterson |
Publisher | : Transportation Research Board National Research |
Total Pages | : 72 |
Release | : 1982 |
Genre | : Science |
ISBN | : |
"This synthesis will be of special interest to maintenance engineers and others seeking information on resealing joints and cracks in pavements. Detailed information is presented on materials, procedures, and evaluation criteria."--Avant-propos.