Research Activities: 2012
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The NASP Bond Test as a Predictor of Strand Bond, Transfer Length, and Development Length |
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| Status | Complete View Final Report: PDF |
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| Sequential Number | R319 | ||||
| Identification Number | 00040985 | ||||
| Matching Research Agency | Precast/Prestressed Concrete Institute |
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| Principal Investigator | Jeffrey Volz Assistant Professor, Civil, Architectural and Environmental Engineering Missouri University of Science and Technology 325 Butler Carlton Hall; 1401 North Pine Street Rolla, MO 65401 (573) 341-6618 jmyers@mst.edu |
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| Student Involvement |
Two graduate students, which represents an increase of one over the original proposal. |
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Project Objective |
The objective of the additional proposed research is to evaluate the ability of the NASP Bond Test to predict the transfer and development lengths of prestressing strand. |
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Project Abstract |
The research team hypothesized that the North American Strand Producers (NASP) test could be used to evaluate bond of prestressing strand in concrete. Specifically, that the test would predict transfer and development lengths of strand in different types of concrete, such as self-consolidating concrete and high-volume fly ash concrete. The researchers found a reasonable correlation between the NASP test and measured transfer and development lengths, but because of the cost of full-scale specimen tests, the number of tests are limited. To provide additional data, the research team will model the bond of prestressing strand in concrete using finite element analyses. The purpose of the analyses is to perform parametric studies on the different variables to determine if a stronger correlation exists between the NASP test and transfer and development lengths of prestressing strand. Dr. K. Chandrashekhara – Curators’ Professor of Mechanical and Aerospace Engineering – has significant expertise in analytical modeling of complex material behavior. He will be added to the project to provide this expertise and strengthen this additional phase of the project. |
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Relationship to other Research/Projects |
This is a standalone project under the advanced materials theme of the Center for Transportation Infrastructure and Safety (CTIS) National University Transportation Center (NUTC) at Missouri S&T. |
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Transportation-Related Keywords |
Advanced Materials, Bridge Decks, Composite Materials, Corrosion Mitigation, Fiber-Reinforced Polymers. | ||||
Technology Transfer Activities |
The technology transfer activities will include a final research report and dissemination of the findings through a national conference via technical presentation(s) and publication(s). . |
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Project Deliverables |
Test data, guidelines, and recommendations on the use of the NASP Bond Test to predict transfer and development lengths of prestressing strand. | ||||
Anticipated Benefits |
Ability to predict transfer and development lengths of prestressing strand in specific concrete mixes, including specialized concretes such as SCC. |
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Milestones |
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