Download or read book Self consolidating Concrete for Cast in place Bridge Components written by George Morcous and published by . This book was released on 2016 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Self consolidating Concrete for Cast in place Bridge Components written by George Morcous and published by . This book was released on 2016 with total page 116 pages. Available in PDF, EPUB and Kindle. Book excerpt: "National Cooperative Highway Research Program (NCHRP) Report 819: Self Consolidating Concrete for Cast in Place Bridge Components presents recommended guidelines for the use of self-consolidating concrete (SCC) in cast in place highway bridge components. These guidelines address the selection of constituent materials, proportioning of concrete mixtures, testing methods, fresh and hardened concrete properties, production and quality control issues, and other aspects of SCC. The report also presents proposed changes to the AASHTO LRFD Bridge Design and Construction Specifications to address use of SCC for cast in place highway bridge components. The information contained in the report will guide materials and bridge engineers in evaluating, selecting, and specifying SCC mixtures for use in cast in place concrete bridge components, thereby facilitating construction, improving the working environment and safety, and reducing cost."--Publisher's description
Download or read book Evaluating Mechanical and Visco elastic Properties of Self consolidating Concrete for Cast in place Bridges written by Micheal A. A. Asaad and published by . This book was released on 2016 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to evaluate the mechanical and viscoelastic properties of SCC developed for CIP applications, especially for CIP bridge components and compare these properties with the predictions models in accordance with AASHTO LRFD 2014 provisions and other codes. Several compression, splitting, flexural, push-off, and pull out tests were conducted on large number of SCC mixtures to recommend modification factors for the CVC prediction models when SCC is used. Also, the effects of SCMs, aggregate type, and aggregate size on viscoelastic and mechanical properties were investigated. Full-scale bridge pier and post-tensioned girder were erected and tested to evaluate the constructability and structural behavior of ready-mixed SCC used in field applications.
Download or read book Evaluation of Self consolidating Concrete for Bridge Structure Applications written by Alen Horta and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The goal of this research was to determine whether precast prestressed bridge elements with congested reinforcement could be cast using self-consolidating concrete (SCC) without vibration and yet comply with all parameters of strength, no honeycombing, and void-free surface finish. Eight wall panels and eight BT-72 13-ft long girder sections were fabricated in two precast plants. A qualitative and quantitative evaluation of the surface finish, and homogeneity of the concrete throughout the specimens was performed. Strength, creep, shrinkage and chloride permeability of the SCC field mixes were investigated. Good quality SCC mixes were produced for the walls and the BT-72 girder sections, which completely filled the specimens without the need of internal or external vibration, and resulted in a superior surface finish and a homogenous distribution of the aggregate throughout the section.
Download or read book I cantici del Brevario romano written by and published by . This book was released on 1949 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NCHRP Report 628 written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Guide for Cast in place Applications of Self consolidating Concrete written by and published by . This book was released on 2007 with total page 154 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Self consolidating Concrete SCC and High volume Fly Ash Concrete HVFAC for Infrastructure Elements written by John J. Myers and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Because of its unique nature, self-consolidating concrete (SCC) has the potential to significantly reduce costs associated with transportation- related infrastructure, benefiting both MoDOT and the residents of Missouri. SCC is a highly flowable, nonsegregating concrete that can be placed without any mechanical consolidation, and thus has the following advantages over conventional concrete: decreased labor and equipment costs during concrete placement, decreased potential for and costs to repair honeycombing and voids, increased production rates of precast and cast-in-place (CIP) elements, and improved finish and appearance of cast and free concrete surfaces. In addition to SCC, innovative materials, such as high-volume fly ash concrete (HVFAC), also provide a significant potential to produce more cost effective mix designs for CIP concrete. Since the 1930’s, fly ash – a pozzolanic material – has been used as a partial replacement of portland cement in concrete to improve the material’s strength and durability, while also limiting the amount of early heat generation. From an environmental perspective, replacing cement with fly ash reduces the concrete’s overall carbon footprint and diverts an industrial by-product from the solid waste stream (currently, about 40 percent of fly ash is reclaimed for beneficial reuse and 60 percent is disposed of in landfills). The objective of this research was to provide an implementation test bed and showcase for the use of sustainable and extended service life concrete. In this implementation study for Missouri Bridge A7957, a level of 50% fly ash to cement proportions was utilized as well as normal strength self-consolidating concrete (NS-SCC) and high-strength self-consolidating concrete (HS-SCC) in its primary carrying elements to showcase the use of these innovative materials. This study focused on monitoring the serviceability and structural performance, both short-term and long-term, of the bridge in an attempt to investigate the in-situ behavior of the NS-SCC, HS-SCC and also the HVFAC mixtures. Consequently, to compare and demonstrate the potential benefits and savings of using NS-SCC, HS-SCC and HVFAC in the first Missouri DOT large-scale bridge structure, this study undertook ten tasks including the following: Task 1: Pre-Construction Planning and Construction Coordination; Task 2: Development of Bridge Instrumentation Plan & Load Testing Plan (Bridge A7957); Task 3: Mix Design and Quality Control Procedures/Quality Assurance – Trial Mixes; Task 4: Shear Testing and Evaluation of HS-SCC Precast NU Girders; Task 5: Precast-Prestressed Plant Specimen Fabrication and Instrumentation; Task 6: Field Cast-In-Place Elements and Instrumentation; Task 7: Hardened Properties of Plant and Field Produced Concrete; Task 8: Bridge Load Testing and Monitoring/Evaluation of Experimental Load Testing Results; Task 9: Reporting/Technology Transfer; Task 10: Value to MoDOT and Stakeholders to Implementing SCC/HVFAC. The final report consists of a summary report and four technical reports. The findings, conclusions and recommendations of the study can be referenced within these reporting components.
Download or read book Lightweight High Performance Concrete Bulb T Beams With Self Consolidating Concrete in a Bridge Structure written by Hamdi Celik Ozyildirim and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lightweight high-performance concrete (LWHPC) with a pozzolan (fly ash or silica fume) or slag cement is expected to provide high strength and high durability with reduced dead load. Reduced dead load may provide savings in the substructure elements. Self-consolidating concrete (SCC) is a new technology with a very high level of workability as it easily fills formwork under the influence of its own mass, typically without any additional consolidation energy. In this study, self-consolidating LWHPC with slag cement was used in the prestressed bulb-T beams for the bridge on Route 17 over Route 15/29 in Fauquier County, Virginia. The deck has LWHPC with slag cement. The bridge has two spans, each 128 ft long. Test beams 65 ft long with the same cross section as the actual beams were cast and tested prior to the fabrication of the bridge beams. The LWHPC provided satisfactory strength and permeability in the test beams and bridge beams that were also SCC. The bridge deck concrete had satisfactory strength and durability with no cracks after two winters. The study recommends that lightweight SCCs with pozzolans or slag cement be considered in beams when there are long spans, poor soil conditions, and congested reinforcement. It is also recommended that lightweight concretes be considered for reducing deck cracking.
Download or read book Implementation of Self Consolidating Concrete SCC for Prestressed Concrete Girders written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-Consolidating Concrete (SCC) was first developed in Japan almost 15 years ago, and it was not until the late 1990's that the U.S precast concrete industry applied the technology to architectural and structural building elements. This study describes the first experience of using SCC for prestressed concrete bridge girders in North Carolina. A multiple-span bridge is currently under construction in eastern North Carolina using one hundred thirty AASHTO Type III girders, each 54.8 ft (16.7 m) long (NCDOT Project 8.1170903). Three girders from one production line of five girders were selected for evaluation. Two of the girders were cast with SCC and one with conventional concrete as the control. The plastic and hardened properties of both the SCC and the conventional concrete were monitored and measured. The fresh properties of SCC included unit weight, air content, slump flow, Visual Stability Index (VSI), and passing ability as measured by J-ring and L-box. Hardened concrete tests on SCC and conventional concrete included compressive strength, static elastic modulus, elastic modulus based on resonance frequency ('dynamic' modulus) at different ages, along with creep and shrinkage. The prestressing force in the girders was monitored by load cells. Finally, the three girders were tested in flexure up to the design service load to determine and compare their load-deformation characteristics. In general, two AASTHO Type III girders were successfully cast without any vibration using SCC, and exhibited virtually identical load-deflection relationships up to the design service load than that of the conventional concrete girder. SCC showed lower elastic modulus after strength adjustment, and higher creep and shrinkage than conventional concrete.
Download or read book Self consolidating Concrete for Prestressed Applications phase I written by Samuel D. Keske and published by . This book was released on 2015 with total page 271 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Self Consolidating Concrete written by Joseph Daczko and published by CRC Press. This book was released on 2012-03-06 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: "A very interesting and useful book for all the different practitioners in the concrete industry. Each necessary step is thoroughly dealt with and explained in a nice and pedagogic way." Peter Billberg, Swedish Cement and Concrete Research Institute (CBI)"Quite comprehensive and with a narrative style at the practitioner level." Lloyd Keller, Direc
Download or read book Self consolidating Concrete for Precast Structural Applications written by Eric P. Koehler and published by . This book was released on 2007 with total page 380 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Innovative Bridge Designs for Rapid Renewal written by HNTB Corporation, Genesis Structures Inc, Structural Engineering Associates, and Iowa State University and published by Transportation Research Board. This book was released on with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report from the second Strategic Highway Research Program (SHRP 2), which is administered by the Transportation Research Board of the National Academies, documents the development of standardized approaches to designing and constructing complete bridge systems for rapid renewals.
Download or read book Performance of Fiber reinforced Self consolidating Concrete for Repair of Bridge Sub structures written by Corey Michael Wirkman and published by . This book was released on 2016 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
