Download or read book Performance Evaluation of Concrete Bridge Decks Reinforced with MMFX and SSC Rebars written by Ching Chiaw Choo and published by . This book was released on 2006 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of MMFX Steel for Concrete Bridge Decks written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Commercially available Micro-Composite, Multi-Structural, Formable (MMFX) steel reinforcing bars are a proprietary product claiming to provide both high tensile strength and excellent corrosion-resistance when compared to conventional Grade 60 steel. Use of MMFX steel reinforcement could potentially lead to significant cost savings due to these unique characteristics. Recently, many state transportation departments, including the North Carolina Department of Transportation (NCDOT), have begun to use MMFX steel as a direct replacement for conventional steel in reinforced concrete bridge decks. However, the behavior of bridge decks reinforced with MMFX steel bars was previously undocumented. In light of this fact, a research program was commissioned by the NCDOT in which three concrete bridge decks, each having a span-to-depth ratio of 12.5, were constructed and tested to failure under simulated truck wheel loads. Two of the decks were constructed with identical reinforcement ratios, one utilizing conventional Grade 60 steel and the other MMFX steel. The third bridge deck was also reinforced with MMFX steel, but was reinforced with 33 percent less steel in an attempt to utilize the higher tensile strength offered by MMFX. The results of the experimental program demonstrate that taking advantage of lowered reinforcement ratios by utilizing the higher strength of MMFX steel is a definite possibility in reinforced concrete bridge decks. The bridge deck reinforced with 33 percent less MMFX steel developed the same load-carrying capacity as the deck reinforced with conventional Grade 60 steel. In addition, the same deck showed the same deflections at service load as the deck reinforced with Grade 60 steel.
Download or read book Evaluation of Portland Cement Concrete for Permanent Bridge Deck Repair written by Kenneth C. Clear and published by . This book was released on 1974 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Evaluation of Bridges with Fiber Reinforced Composite Decks written by William Edward Wolfe and published by . This book was released on 2003 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Final Report on Evaluation of the Performance of Galvanized Reinforcement in Concrete Bridge Decks written by David Stark and published by . This book was released on 1982 with total page 77 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Methods of Corrosion Protection and Durability of Concrete Bridge Decks Reinforced with Epoxy coated Bars Phase I written by Lisa M. Samples and published by . This book was released on 1999 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Performance Evaluation of Bridge Deck Protection Systems written by Minnesota. Department of Transportation. Research and Standards Section and published by . This book was released on 1977 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Exodermic Bridge Deck Performance Evaluation written by Irene K. Battaglia and published by . This book was released on 2010 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavior of Concrete Bridges Reinforced with High Performance Steel Reinforcing Bars written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: High-performance (HP) steel reinforcing bars are characterized by their high tensile strength and enhanced corrosion resistance in comparison to conventional ASTM A 615 Grade 60 steel. Use of HP steel in concrete bridges could lead to potential savings by reducing the amount of steel required based on its higher strength characteristics and expanding the service life of bridges due to its enhanced corrosion resistance. A commercially available steel know Micro-Composite Multi-Structural Formable (MMFX) steel which is conforming to ASTM A 1035, was selected for this study because of its high tensile strength and enhanced corrosion resistance. Comprehensive experimental and analytical programs were carried out to evaluate the mechanical properties of the HP steel bars, its bond characteristics, and the behavior of concrete bridge decks reinforced with HP steel. Research findings showed that HP steel used in this study exhibited much higher tensile strength than that of conventional Grade 60. In addition, the HP steel bars had much lower corrosion rate than Grade 60 bars. Bending HP steel bars reduce its ultimate strength and strain by 6 and 70 percent, respectively. However, when HP steel bent bars are bonded to concrete they develop their full stress-strain capacity. Bond test results indicated that a stress level up to 90 ksi can be developed in #8 HP steel bars without the use of transverse reinforcement. The use of transverse reinforcement increases the bond strength of HP steel reinforcing bars, consequently reaching stress levels in the bars up to 150 ksi. When possible, it is recommended to use a minimum amount of transverse reinforcement to confine spliced bars to ensure ductile behavior and provide warning prior to failure. Direct replacement of Grade 60 with HP steel bars in bridge decks is a conservative approach. However, reducing the amount of HP steel by 33 percent does not impair the ultimate-load carrying capacity or alter the serviceability behavior o.
Download or read book Structural Design Guidelines for Concrete Bridge Decks Reinforced with Corrosion Resistant Reinforcing Bars written by Abraham Lama Salomon and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This research program develops and validates structural design guidelines and details for concrete bridge decks with corrosion-resistant reinforcing (CRR) bars. A two-phase experimental program was conducted where a control test set consistent with a typical Virginia Department of Transportation bridge deck design using Grade 60 steel (ASTM A615, fy = 60 ksi) and epoxy-coated reinforcing steel was compared to deck slab specimens where Grade 60 is replaced with CRR bars. The experimental program was designed to evaluate how flexural performance at service and ultimate limit states are affected by a one-to-one replacement of Grade 60 with CRR bars, a reduction of concrete clear cover, and a reduction in rebar size. Structural analysis models were developed using Response 2000 in order to predict the CRR bridge deck moment-curvature and the moment-crack width relationships. Experimental trends proved to be consistent with the analytical results demonstrating the viability of Response 2000 as a design tool for reinforced concrete with high-strength and nonmetallic rebar without a defined yield plateau. For reduced bar size and clear cover (2.00 in instead 2.50 in), ASTM A1035 and UNS S32304 specimens proved to have similar deformability ratios and crack widths that comply with current AASHTO requirements, with as much as 36% less steel.
Download or read book Descrizione topografica fisica economica politica de reali Dominj al di qua del Faro nel Regno delle due Sicilie con Cenni storici fin da Tempi avanti il Dominio de Romani di Giuseppe del Re written by and published by . This book was released on 1830 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Nondestructive Testing to Identify Concrete Bridge Deck Deterioration written by and published by Transportation Research Board. This book was released on 2013 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: " TRB's second Strategic Highway Research Program (SHRP 2) Report S2-R06A-RR-1: Nondestructive Testing to Identify Concrete Bridge Deck Deterioration identifies nondestructive testing technologies for detecting and characterizing common forms of deterioration in concrete bridge decks.The report also documents the validation of promising technologies, and grades and ranks the technologies based on results of the validations.The main product of this project will be an electronic repository for practitioners, known as the NDToolbox, which will provide information regarding recommended technologies for the detection of a particular deterioration. " -- publisher's description.
Download or read book Performance Evaluation of Reinforced Concrete Bridge Columns Through Experimental Blast Testing written by A. E. Echevarria and published by . This book was released on 2014 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluation of High Performance Fiber Reinforced Concrete for Bridge Deck Connections Closure Pours and Joints written by Levon C. Hoomes and published by . This book was released on 2017 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Connections, closure pours, and joints in bridges are often sources of distress because of cracks and openings. Wide separation facilitates the penetration of harmful solutions that can lead to costly repairs. Cracks are caused by volumetric changes attributable to moisture and temperature and the application of service loads after the concrete has hardened. Poor bonding between the existing concrete and new concrete can lead to separation or opening. Wide cracks or openings within the material or at the interface and leaking joints allow the ingress of water and chemicals, causing damage to the bridge deck sections and the bridge substructure through corrosion of reinforcing steel, alkali-silica reactions, sulfate attack, and freeze-thaw damage. This study was designed to evaluate properties of fiber-reinforced concrete and cementitious composites in controlling cracking for bridge deck closure pours (i.e., link slabs). Plastic and hardened mixture properties of high-performance fiber-reinforced concrete (HPFRC) were evaluated, with emphasis on deflection hardening, flexural toughness, and bond strength. A secondary objective was to evaluate various bond strength tests for use in prequalification or quality assurance of mixtures. The addition of a small amount of discontinuous fibers to a conventional concrete matrix minimizes cracking, but the size of these cracks still permits the intrusion of harmful solutions. High volumes of suitable fibers used in HPFRC produce multiple very tight cracks (
Download or read book Performance Evaluation of Low Permeable Concrete Bridge Deck written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Concrete Bridge Deck Performance written by H. G. Russell and published by Transportation Research Board. This book was released on 2004 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.
Download or read book Evaluation of Galvanized Rebars for Concrete Bridge Decks written by H. J. Fromm and published by . This book was released on 1982 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
