Development And Layout Of A Protocol For The Field Performance Of Concrete Deck And Crack Sealants 4h Electronic Resource
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Author | : Imad L. Al-Qadi |
Publisher | : |
Total Pages | : 7 |
Release | : 2011 |
Genre | : Adhesion |
ISBN | : |
Current crack sealant specifications utilize a simple empirical bond test [ASTM D5329, "Standard Test Methods for Sealants and Fillers, Hot-Applied, for Joints and Cracks in Asphaltic and Portland Cement Concrete Pavements"] to measure a sealant's ability to adhere to concrete briquettes. However, no correlation exists between the results of this standard test and a sealant's field performance. To bridge the gap between sealants' fundamental properties and field performance, performance-based guidelines for the selection of hot-poured crack sealants have been developed. This paper proposes a new test procedure to help assess the capability of sealants to adhere to the sides of cracks in pavement. The proposed crack sealant adhesion direct tensile (CSADT) test procedure calls for the use of a direct tensile tester with modifications to the end pieces and the specimen holder. Sealant is confined between two aluminum pieces, which will move apart at 0.05 mm/s until failure occurs. Failure load and the displacement at failure are recorded and then used to assess the sealant's adhesion capability. A crack created on one side of the assembly during specimen preparation determines the initial failure location and ensures that the failure occurs at the interface and not within the sealant. The specimen preparation is designed to simulate sealant installation, and experimental conditions have been developed to represent crack openings during pavement contraction in cold weather. The repeatability of the suggested procedure was acceptable with an average coefficient of variation of 10.9 %. No significant difference existed between two operators or between two test setups.
Author | : Xiaodi Hu |
Publisher | : |
Total Pages | : 46 |
Release | : 2009 |
Genre | : Pavements |
ISBN | : |
Crack sealants are widely used in Texas to prevent water from entering into lower structural layers thereby extending pavement life. However, most current crack sealants have been reported to have a very short life mainly due to adhesive failures. Although adhesive failure is known to be the major failure mechanism very little attention has been paid to measuring this property in the laboratory. The main objective of this project was to develop a performance related adhesion test using TxDOTs Overlay Tester. In this report the crack sealant adhesion test protocol developed in year 1 of this study was finalized. The final test protocol includes a molding jig, a detailed sample preparation procedure, an adhesion test protocol, and criteria for interpreting the results. In this study 13 sealants (some of them have never been used in Texas) were evaluated following the proposed test protocol.
Author | : Ken Skorseth |
Publisher | : |
Total Pages | : 112 |
Release | : 2000 |
Genre | : Gravel roads |
ISBN | : |
The purpose of this manual is to provide clear and helpful information for maintaining gravel roads. Very little technical help is available to small agencies that are responsible for managing these roads. Gravel road maintenance has traditionally been "more of an art than a science" and very few formal standards exist. This manual contains guidelines to help answer the questions that arise concerning gravel road maintenance such as: What is enough surface crown? What is too much? What causes corrugation? The information is as nontechnical as possible without sacrificing clear guidelines and instructions on how to do the job right.
Author | : Nilson |
Publisher | : Wiley |
Total Pages | : |
Release | : 1987-04-13 |
Genre | : |
ISBN | : 9780471830733 |
Author | : United States. Army. Corps of Engineers |
Publisher | : |
Total Pages | : 120 |
Release | : 1974 |
Genre | : Concrete |
ISBN | : |
Author | : Britta Folmer |
Publisher | : Academic Press |
Total Pages | : 558 |
Release | : 2016-12-16 |
Genre | : Technology & Engineering |
ISBN | : 0128035587 |
The Craft and Science of Coffee follows the coffee plant from its origins in East Africa to its current role as a global product that influences millions of lives though sustainable development, economics, and consumer desire. For most, coffee is a beloved beverage. However, for some it is also an object of scientifically study, and for others it is approached as a craft, both building on skills and experience. By combining the research and insights of the scientific community and expertise of the crafts people, this unique book brings readers into a sustained and inclusive conversation, one where academic and industrial thought leaders, coffee farmers, and baristas are quoted, each informing and enriching each other. This unusual approach guides the reader on a journey from coffee farmer to roaster, market analyst to barista, in a style that is both rigorous and experience based, universally relevant and personally engaging. From on-farming processes to consumer benefits, the reader is given a deeper appreciation and understanding of coffee's complexity and is invited to form their own educated opinions on the ever changing situation, including potential routes to further shape the coffee future in a responsible manner. Presents a novel synthesis of coffee research and real-world experience that aids understanding, appreciation, and potential action Includes contributions from a multitude of experts who address complex subjects with a conversational approach Provides expert discourse on the coffee calue chain, from agricultural and production practices, sustainability, post-harvest processing, and quality aspects to the economic analysis of the consumer value proposition Engages with the key challenges of future coffee production and potential solutions
Author | : Pile Buck |
Publisher | : Lulu.com |
Total Pages | : 269 |
Release | : 2012-09-28 |
Genre | : Technology & Engineering |
ISBN | : 1105155242 |
This working manual covers everything from theory, practical design, templates, installation, filling, equipment, maintenance to removal. With the combination of the TVA Technical Monograph 75-Steel Sheet Pile Cofferdams on the Rock manual and the US Corps of Engineers manual - Theoretical Manual for Design of Cellular Sheet Pile Structures our Cellular Cofferdams handbook make for an excellent reference book. Cellular Cofferdams, the large, barrel-like, interconnected structures formed of steel sheet piling and filled with coarse soil. Generally utilized for dewatering large construction sites as well as building piers, quaywalls, bulkheads, breakwaters and artificial islands. Over the years, a few papers on design theory have come forth, but only one complete publication devoted to the entire subject.
Author | : American Society of Civil Engineers |
Publisher | : American Society of Civil Engineers |
Total Pages | : 82 |
Release | : 1995 |
Genre | : Technology & Engineering |
ISBN | : |
Author | : American Water Works Association |
Publisher | : American Water Works Association |
Total Pages | : 286 |
Release | : 2008 |
Genre | : Science |
ISBN | : 1583215492 |
This comprehensive manual of water supply practices explains the design, selection, specification, installation, transportation, and pressure testing of concrete pressure pipes in potable water service.
Author | : Robert Otto Rasmussen |
Publisher | : Transportation Research Board |
Total Pages | : 96 |
Release | : 2004 |
Genre | : Pavements |
ISBN | : 0309070198 |
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 338: Thin and Ultra-Thin Whitetopping summarizes available information to document how state departments of transportation and others are currently using thin and ultra-thin whitetopping overlays among various pavement rehabilitation alternatives. The report covers all stages of the proper application of whitetopping overlays, including project selection, design, materials selection, construction, maintenance, and eventual rehabilitation or replacement.