Download or read book Laboratory Evaluation of Expedient Pavement Repair Materials written by Raymond S. Rollings and published by . This book was released on 1978 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Past work and current technical literature were reviewed to determine potential capping materials for expedient repair of small craters (less than 20 by 20 feet repair areas) in airfield pavements. Seven materials identified in the literature review were tested in the laboratory to develop information on their strength and cure requirements. Accelerated high alumina cement, magnesium phosphate cement, three commercial asphalt products and unsurfaced, well compacted aggregate were recommended for field testing as the most promising small crater repair materials. (Author).
Download or read book Technical Abstract Bulletin written by and published by . This book was released on with total page 1048 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Expedient Repair Materials for Roadway Pavements written by and published by . This book was released on 2005 with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt: Materials for expedient roadway pavement repairs must provide a trafficable repair in a minimal amount of time. Therefore, any repair material must be able to cure quickly and be easy to use. There are a large number of proprietary cementitious rapid repair materials for both asphalt and concrete pavements. Three types of cementitious materials were used to make acceptable expedient repairs to an asphalt roadway. Trafficking showed that these materials were not flexible enough to provide durable repairs to flexible pavements in hot weather. There are a number of proprietary asphalt based repair materials. These materials can generally be trafficked immediately after placement with some displacement, depending upon the loads. These products will gain more stability with time and with cooler temperatures. Repair materials using cut-back asphalts generally provide the best combination of workability and long-term storage under adverse conditions, particularly freezing temperatures. This study evaluated the asphalt repair materials for workability, strength using Marshall stability and triaxial testing, and durability in regards to cohesion and adhesion properties. The majority of repair materials use an open-graded mixture and the Marshall stability test is not appropriate for this type of gradation. The proprietary cold mixtures were all easier to apply and work with than the conventional cold mix. The products that advertised placement into wet holes all preformed well and provided equal performance in both wet and dry holes for the traffic and evaluation period used.
Download or read book Field Test of Expedient Pavement Repairs test Items 16 35 written by Michael T. McNerney and published by . This book was released on 1980 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory and Fields Evaluation of Rapid Setting Materials Used for Repair of Concrete Pavements written by Kevin G. Smith and published by . This book was released on 1984 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Trials of Rapid Setting Repair Materials written by Prashant Ram and published by . This book was released on 2016-12-31 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of the present study was to identify the critical properties (based on the laboratory tests) that could be correlated to the field performance of the rapid setting repair materials.The first phase of the project involved laboratory evaluation of six commercial rapid-setting repair materials (RMs). When tested in the laboratory, all but two exhibited acceptable rates of strength gain and three displayed relatively poor freeze-thaw resistance. All the RMs exhibited acceptable values for free-shrinkage, high resistance to cracking and good bond to substrate concrete. The resistance to chloride ion penetration of one of the RMs was very poor.The second phase of the project involved field installation and performance evaluation of the RMs. It was seen that while, in most cases, the controlled laboratory conditions yielded consistent mixes and acceptable performance, the properties of mixes produced on site were more variable. This was the result of somewhat uncontrolled changes in the amount of aggregate extension used, moisture content of the aggregates, amount water added and ambient temperature conditions. Follow-up inspection of the repair patches indicated that all the patches except one underwent premature failures (primarily cracking and edge de-bonding). The ambient temperature during the repairs was around 10°C. This led to an extended set-time for all the materials. The 12-hr compressive strengths values of the specimens from the field-mixes were occasionally lower than the 4-hr compressive strength values of laboratory mixes. Since the repairs were open to traffic after approximately 4 hours after placement, the low early age strengths could be a potential reason for premature failures of some of the patches.In general, several materials were found to be very sensitive to excess water added during mixing, resulting in a significant impact on the durability properties - especially the freeze-thaw resistance. In the field, for most of the materials, the consistency of the mixes varied across batches - this can be attributed to the variations in the aggregate extension adopted, mix-water added and the moisture content of the aggregates used. Construction-related issues (consolidation and finishing) also played an important role in the performance of the repair patches.
Download or read book Evaluation and Repair of Concrete Structures written by James E. McDonald and published by . This book was released on 1991 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Government Reports Announcements Index written by and published by . This book was released on 1994-05 with total page 588 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laboratory Testing of High Performance Repair Materials for Pavements and Bridge Decks written by Kamran Amini and published by . This book was released on 2015 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of numerous freezing and thawing cycles happening during the year in the state of Ohio, pavement partial-depth patching has become a common maintenance activity in this state. The Ohio Department of Transportation (ODOT) has a need for durable, more permanent high performing pavement and bridge deck materials that allow for a faster repair and for user safety. However, new or proprietary products are difficult to specify unless incorporated into a construction project for research purposes or procurement of the product complies with the ODOT's direct purchasing requirements.This research project was conducted in three main phases, literature review and selecting the proper materials, field patching and inspection of the materials, and laboratory testing of the materials to compare the results to the field inspections. All these phases were conducted in order to specify for use in future ODOT construction, based on the field and laboratory performances of the products. As the last phase of this research project, this thesis investigates the properties and performance of the selected products used for partial-depth repair of concrete pavement in a laboratory. The materials were tested for freeze-thaw, modulus of elasticity, strength, shrinkage, ultrasonic pulse velocity, mass change, and scaling damage to quantify their characteristics relative to those products known to work well. The objective of this study was to document the investigation of the lab testing of selected repair materials for partial-depth repair. The investigation determined the acceptable laboratory tests for comparative analysis of existing repair materials. Eventually, the investigated materials were ranked based on their overall performance considering economic aspect and their laboratory and field performances.
Download or read book Fiberglass reinforced Plastic Surfacing for Rapid Runway Repair by Naval Construction Forces written by P. S. Springston and published by . This book was released on 1979 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents exploratory research conducted to develop a preliminary concept for repairing bomb-damaged runways with prefabricated fiberglass-reinforced plastic membranes. The membranes would function as traffickable caps over backfilled craters. A structural analysis has been completed using the finite element method and a design is presented for a membrane to be traffic-tested under simulated F-4 aircraft wheel loads at the Rapid Runway Repair Test Facility of the Air Force Engineering and Services Center/Research Division at Tyndall AFB, Florida. Methods for joining panels to form large membranes and a tiedown method are discussed. A general concept for rapid runway repair by the Naval Construction Forces using table-of-allowance (P25 and P31) equipment is presented. (Author).
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1989 with total page 1134 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1981 with total page 940 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the 10th International Conference on Maintenance and Rehabilitation of Pavements written by Paulo Pereira and published by Springer Nature. This book was released on with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Effects of Weather on Rapid Runway Repair written by J. M. Whitehead and published by . This book was released on 1983 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index Keyword A L written by and published by . This book was released on 1984 with total page 1092 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Maintenance of Pavements written by United States. Department of the Air Force and published by . This book was released on 1958 with total page 234 pages. Available in PDF, EPUB and Kindle. Book excerpt:
