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Transfer Lengths For Prestressed Concrete Beams Cast With Self Consolidating Concrete Mixtures
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Book Synopsis Transfer Lengths for Prestressed Concrete Beams Cast with Self-Consolidating Concrete Mixtures by : Blake William Staton
Download or read book Transfer Lengths for Prestressed Concrete Beams Cast with Self-Consolidating Concrete Mixtures written by Blake William Staton and published by . This book was released on 2006 with total page 470 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Evaluating the Time-dependent Deformations and Bond Characteristics of a Self Consolidating Concrete Mix and the Implication for Pretensioned Bridge Applications by : Kyle H. Larson
Download or read book Evaluating the Time-dependent Deformations and Bond Characteristics of a Self Consolidating Concrete Mix and the Implication for Pretensioned Bridge Applications written by Kyle H. Larson and published by . This book was released on 2007 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of an extensive experimental program conducted to determine the material, bond characteristics, and time-dependent deformations of a proposed self-consolidating concrete (SCC) mixture for bridge girders are presented. This research program was completed in three phases. The first phase consisted of 15 full-scale, pretensioned SCC flexural specimens tested to evaluate their transfer and development lengths. These specimens included both single-strand and multiple-strand beams, as well as specimens designed to evaluate the so-called 'top-strand' effect. The top-strand specimens, with more than 20 inches of concrete below the strand, were tested to evaluate the current American Association of State Highway and Transportation Officials requirement of a 30% increase in the development length when the concrete below the strand is more than 12 inches. Strand end-slip measurements, used to estimate transfer lengths, indicated the proposed SCC mixture meets ACI and AASHTO requirements. In addition, flexural tests confirmed the proposed SCC mixture also meets current code requirements for development length. The second phase was to evaluate the elastic shortening, creep, and shrinkage properties of the proposed SCC mixture for bridge girders. Four bridge girders with an inverted-T profile were used to measure these time-dependent deformations. In two of the specimens, the strands were tensioned to 75% of the ultimate tensile strength, simulating a girder at service. Strands of the other two specimens were left untensioned to evaluate shrinkage effect of the concrete alone. The shrinkage was then subtracted from the fully tensioned specimens and elastic shortening and creep were isolated after relaxation losses were calculated from code expressions. In addition, the fully tensioned specimens were used to determine transfer lengths of the prestressing strand. The final phase of the program was to record strain measurements of the actual bridge girders used in the field. Elastic shortening, creep, and shrinkage prestress losses of the proposed SCC mixture were compared with current design equations. Instrumentation of seven pretensioned girders in a five-span bridge located in Cowley County, Kansas, was used to measure time-dependent deformations. Three of these girders utilized SCC, while the other four were cast with conventional concrete.
Book Synopsis Self-consolidating Concrete for Precast, Prestressed Concrete Bridge Elements by : Kamal Khayat
Download or read book Self-consolidating Concrete for Precast, Prestressed Concrete Bridge Elements written by Kamal Khayat and published by Transportation Research Board. This book was released on 2009 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.
Book Synopsis Bond Strength of Self-consolidating Concrete for Prestressed Concrete Applications by : Amgad F. Girgis
Download or read book Bond Strength of Self-consolidating Concrete for Prestressed Concrete Applications written by Amgad F. Girgis and published by . This book was released on 2004 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Self Consolidating Concrete (SCC) Mix Proportioning on Transfer and Development Length of Prestressingstrands by : Mahmoodul Haq
Download or read book Effect of Self Consolidating Concrete (SCC) Mix Proportioning on Transfer and Development Length of Prestressingstrands written by Mahmoodul Haq and published by . This book was released on 2005 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bond, Transfer Length, and Development Length of Prestressing Strand in Self-consolidating Concrete by : Krista Beth Porterfield
Download or read book Bond, Transfer Length, and Development Length of Prestressing Strand in Self-consolidating Concrete written by Krista Beth Porterfield and published by . This book was released on 2012 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Due to its economic advantages, the use of self-consolidating concrete (SCC) has increased rapidly in recent years. However, because SCC mixes typically have decreased amounts of coarse aggregate and high amounts of admixtures, industry members have expressed concerns that the bond of prestressing strand in SCC may be compromised. While the bond performance of prestressing strand in a new material such as SCC is an important topic requiring investigation, the results are only applicable if the research is completed on strands with similar bond quality as the strands used in the field. Therefore, the objectives of this research program were to investigate the transfer and development lengths of prestressing strand in SCC and also evaluate the effectiveness of two proposed bond tests in determining acceptable bond quality of strand. Transfer and development lengths of 0.5-in. diameter (12.5 mm), Grade 270 prestressing strand were evaluated using rectangular beams constructed from normal and high strength conventional concrete and SCC mixes. End slips at release and strain readings over 28 days were used to calculate transfer lengths, and development lengths were evaluated through four-point loading at varying embedment lengths. Additionally, the NASP bond test and Large Block Pullout Tests (LBPT) were evaluated with strand from three different sources to determine if one test could be considered more reliable at predicting acceptable bond. Results indicated that bond performance of SCC and conventional concrete were comparable, and that AASHTO and ACI equations for transfer and development length were generally conservative. The NASP bond test and LBPT were found to be equally valid, but the acceptance limits for both tests appear to require revisions"--Abstract, leaf iii.
Book Synopsis Experimental Evaluation and Field Monitoring of Self-consolidating Concrete Prestressed Box Beams Implemented in a Demonstration Bridge by : David A. Bendert
Download or read book Experimental Evaluation and Field Monitoring of Self-consolidating Concrete Prestressed Box Beams Implemented in a Demonstration Bridge written by David A. Bendert and published by . This book was released on 2007 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transfer Length in Prestessed Self-consolidating Concrete by :
Download or read book Transfer Length in Prestessed Self-consolidating Concrete written by and published by . This book was released on 2005 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulb-T Beams with Self-consolidating Concrete on the Route 33 Bridge Over the Pamunkey River in Virginia by : Hamdi Celik Ozyildirim
Download or read book Bulb-T Beams with Self-consolidating Concrete on the Route 33 Bridge Over the Pamunkey River in Virginia written by Hamdi Celik Ozyildirim and published by . This book was released on 2008 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study evaluated the bulb-T beams made with self-consolidating concrete (SCC) used in the Route 33 Bridge over the Pamunkey River at West Point, Virginia. Before the construction of the bridge, two test beams with SCC similar in cross section to the actual beams in the structure were cast and loaded to failure at the Federal Highway Administration's Turner-Fairbank Highway Research Center in McLean, Virginia. They were tested for transfer length, development length, flexural strength, and shear strength. These test beams demonstrated that SCC members can be designed using the same methods, assumptions, and limiting values as used for normally consolidated concrete beams. Based on the positive results, beams with SCC were cast and placed in the Route 33 Bridge. The study found that SCC yielding adequate slump flow can be prepared without segregation and with satisfactory strength and acceptably low permeability. However, proper attention must be devoted to mixture proportioning, workability, stability, and air content to ensure the quality of the product. The use of SCC in beams will have two major benefits: (1) expedited construction at the plant, a savings that is difficult to estimate at this time, and (2) improved quality. If the second benefit provides a 10 percent increase in service life, which is a reasonable expectation; given a typical $10.68 million yearly expenditure for prestressed concrete beams, this could lead to a cost savings for the Virginia Department of Transportation of close to $1 million per year.
Book Synopsis Self-consolidating Concrete (SCC) Structural Investigation by :
Download or read book Self-consolidating Concrete (SCC) Structural Investigation written by and published by . This book was released on 2005 with total page 238 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :FIB – International Federation for Structural Concrete Publisher :FIB - Féd. Int. du Béton ISBN 13 :2980676225 Total Pages :650 pages Book Rating :4.9/5 (86 download)
Book Synopsis 10th PhD Symposium in Quebec Canada by : FIB – International Federation for Structural Concrete
Download or read book 10th PhD Symposium in Quebec Canada written by FIB – International Federation for Structural Concrete and published by FIB - Féd. Int. du Béton. This book was released on 2014-07-01 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book PCI Journal written by and published by . This book was released on 2009 with total page 744 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Civil Engineering Studies written by and published by . This book was released on 2009 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Guide to the B.S. Code of Practice for Prestressed Concrete : No.115:1959 by : Francis Walley
Download or read book A Guide to the B.S. Code of Practice for Prestressed Concrete : No.115:1959 written by Francis Walley and published by . This book was released on 1961 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress Report, Behavior of Prestressed Concrete Beams at Transfer by : Tung Yen Lin
Download or read book Progress Report, Behavior of Prestressed Concrete Beams at Transfer written by Tung Yen Lin and published by . This book was released on 1956 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interim Guidelines for the Use of Self-consolidating Concrete in Precast/Prestressed Concrete Institute Member Plants by : Precast/Prestressed Concrete Institute
Download or read book Interim Guidelines for the Use of Self-consolidating Concrete in Precast/Prestressed Concrete Institute Member Plants written by Precast/Prestressed Concrete Institute and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fibrous Concrete by : Concrete Society
Download or read book Fibrous Concrete written by Concrete Society and published by . This book was released on 1980 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
