5 edition of Revibration of retarded concrete for continuous bridge decks found in the catalog.
Revibration of retarded concrete for continuous bridge decks
Hubert K. Hilsdorf
|Statement||[by] H. K. Hilsdorf and J. L. Lott.|
|Series||National Cooperative Highway Research Program. Report, 106, Report (National Cooperative Highway Research Program) ;, 106.|
|Contributions||Lott, James L., joint author.|
|LC Classifications||TE7 .N25 no. 106, TG335 .N25 no. 106|
|The Physical Object|
|Number of Pages||67|
|LC Control Number||79608894|
The foot-long Grove Isle Bridge is the only lifeline for the tiny Grove Isle Hotel & Spa. The U.S. Coast Guard and Florida Department of Transportation own the bridge while the Grove Island Condo Association maintains it. Much of the six-month-long, $ million project involved repairing the concrete on the underside of the bridge deck. EXAMPLE 6 - DECK DESIGN, INCLUDING COLLISION ON A TYPE 7 & TYPE 10M BARRIER 6 Where: Flexural cracking variability factor γ1 = (non-segmental brg.) Ratio of specified min. yield strength to ultimate tensile strength γ3 = (A steel) Concrete density modification factor λ = AASHTO Modulus of rupture ksi AASHTO Section modulus of design section . The Infrared Bridge Inspection System is designed for a wide range of non-destructive bridge inspection work. The test procedure afforded by the system provides a fast and repeatable way to inspect and map delaminations within concrete bridge decks, supports, and ramps. DECK PLACING SEQUENCE A deck placing sequence diagram and notes shall be shown on the plans for all multi-span bridges and single-span integral abutment bridges. Continuous placement shall not be allowed. STANDARD SEQUENCE FOR BRIDGES DESIGNED AS SIMPLE SPANS OR DESIGNED CONTINUOUS FOR LIVE LOAD WHEN GIRDERS ARE AT LEAST 90 DAYS OLD. 1 2 1 2 1 T T.
Precast Concrete Deck Systems Unlike CIP decks, precast concrete decks are made with concrete slabs that are cast elsewhere and delivered to the site of the bridge for construction. Each segment is about 8 to 12 ft long. Precast decks are usually made of pre-stressed concrete to minimize the risk of damage during transportation. Metal Deck Systems.
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Revibration of retarded concrete for continuous bridge decks (National Cooperative Highway Research Program. Report) [Hubert K Hilsdorf] on *FREE* shipping on qualifying offers.
Revibration of retarded concrete for continuous bridge decks. [Hubert K Hilsdorf; James L Lott] -- Laboratory studies were conducted to investigate the effectiveness of revibration of concrete in repairing cracks several hours after it was placed.
A.l Bridge Deck Surveys A.2 Effect of Revibration on the Properties of Plain Concrete Page 26 26 • • 28 Appendix B: Survey of the Use of Revibration in the Construction of Reinforced Concrete Bridge Decks - Phase 1 32 Appendix C: Effectiveness Study - Phase 34 C.l Objective and Scope.
Revibration of Retarded Concrete for Continuous Bridge Decks: Author(s): Hilsdorf, Hubert K.; Lott, J.L. Subject(s): Vibrated concrete Bridges, Concrete --Floors: Issue Date: Publisher: University of Illinois Engineering Experiment Station.
College of Engineering. University of Illinois at Urbana-Champaign. Series/Report: Civil. Revibration of Retarded Concrete for Continuous Bridge Decks. By Hubert K. Hilsdorf and J.L.
Lott. Abstract. The National Cooperative HIghway Research Program; Highway Research Board; National Academy of Sciences-National Research CounciAuthor: Hubert K. Hilsdorf and J.L. Lott. The use of setting retarder in high doses and revibration of the concrete reduces the air-voids in hardened concrete.
Keywords: revibration, retardation, workability, fresh concrete, compressive strength. 1 Introduction It is essential to place concrete continuously to avoid cold joints in structures such as beam-column intersection and large constructions (bridge decks and turbine foundations).
The techniques and procedures involved in bridge deck construction have remained fairly consistent since the first publication of this manual in However, introduction of new materials, methods, and specifications such as the “Quiet Deck” and “Crack-Less Concrete Bridge Deck” specification.
CONCRETE DECK SLAB INTRODUCTION - CHAPTER 10 PART 2 DATE: 31Oct SHEET 1 of 1 FILE NO. INTRODUCTION It is the intent of this chapter to establish the practices and specific requirements of the Structure and Bridge Division for the design and detailing of concrete deck.
Bridge Deck Concrete Placement Checklist – see Spec. Revised 6/ Day 6 7% strength gained for a total of 68%. Note: A 7 day wet cure is required on decks. This starts when the last curing protection is inplace.
If control cylinders are used, there is a minimum of 96 hours. Note: Must be surface moist through the 7 day curing period. Steel Bridge, Deck Design, Concrete Deck, Precast Concrete Deck, Wood Deck, Metal Grid Deck, Orthotropic Deck Revibration of retarded concrete for continuous bridge decks book Statement No restrictions.
This document is available to the public through the National Technical Information Service, Springfield, VA Security Classif. (of this report) Unclassified Security Classif.
In concrete bridge widening projects, it is a common practice to provide a monolithic connection between the existing and new decks by casting an in situ concrete stitching slab. BRIDGE DECKS September DESIGN DETAILS FOR BRIDGE DECKS General The following general criteria apply to bridge decks that are constructed compositely in conjunction with concrete girders, steel girders and the top slabs of cast-in.
There are three major forms of construction: Solid slab deck (infill deck), Beam and slab deck, Voided bridge deck. Solid slab is ideal for short spans with shallow construction depths. Revibration of retarded concrete for continuous bridge decks book A bridge floor is the entire length of the bridge from the roadway side of the mudwall or pile cap to the other roadway side of the mudwall or pile cap and the entire width from one coping edge across to the other coping edge.
(The bridge deck is the roadway portion of a bridge, including shoulders.). Several sources of cracking for concrete bridge deck overlays have been identified [2, 3, 7].
Concrete bridge decks and deck overlays may develop cracks whenever the tensile stresses (induced by either internal or external sources) exceed the tensile strength of the concrete.
Guideline for Rating Cantilever Portions of Concrete Bridge Decks Usually, deck overhangs at the exterior girder do not control the slab rating.
However, the rater should use judgment in determining if the overhang should be rated. A criteria that may be used is: Rate the cantilever portion of the concrete bridge deck if the wheel load can be.
Repairing Bridge Deck Cracks Epoxy bonding is an economical solution. By Floyd Sr. Close-up of cleaned concrete deck and trapped dust and debris in the cracks before being blown out clean with air.
There are three imperatives for repairing cracked bridge decks. First, determine if the cracks are structural or non-structural. RE: continuous deck pour with a concrete retarder.
PEinc (Geotechnical) 3 Aug 18 The problem for the above pictured bridge was magnified by the fact that the girder "splices" in Span 2, near the Pier 1, were pinned hanger connections.
DESiGN GUiDE FOR BRiDGES FOR SERviCE LiFE â ¢ Availability of and the construction expertise to incorporate internal and/or ancil- lary protective systems for the bridge deck; and â ¢ Ability to provide an alignment and/or a bridge drainage system to prevent pond- ing of water and soluble pollutants on the bridge deck.
Rigid‐Frame Concrete Bridges. Fundamentals of Prestressed Concrete Bridges. Precast Prestressed Concrete I‐Beam Bridges: Simple and Continuous Spans. Precast Prestressed Deck Beam Bridges. Topics Relevant to Prestressed Concrete Bridges.
Prestressed Waffle Slab Bridges. Prestressed Concrete Box Girders. Principles of Strength Design. Methods. A comparison of different NDE methods for detecting bridge deck delamination damage requires reliable ground truth information. In this study, ground truth data was derived from cores that were extracted from the bridge deck and from a reference chain drag study that was conducted by nondestructive evaluation validation center (NDEVC) staff using a comprehensive chain drag test.
Bridge Deck Construction Process Review PURPOSE: The purpose of this review is to evaluate the adequacy of the (STA) Department of Transportation's (STA's) procedures for bridge deck construction. This review will focus on the entire bridge deck construction process from portland cement concrete mix design through curing and texturing.
Effects of traffic vibration on curing concrete stitch: Part I—test method and control program. Revibration of Retarded Concrete for Continuous Bridge Decks.
Join ResearchGate to find. Suggested Citation:"Chapter 2 - Common Defects of Concrete Bridge Decks." National Academies of Sciences, Engineering, and Medicine.
Nondestructive Testing to Identify Concrete Bridge Deck Deterioration. Washington, DC: The National Academies Press. doi: / ×. capacity of typical bridge deck slabs reinforced with CFRP. The model consisted of three continuous spans of meters each and two cantilevers, with overall dimensions of x m and a thickness of mm, as shown in Fig.
Each of the spans and the two cantilevers were tested independently using a single concentrated load applied over a. The goal was to use field data to identify factors that contribute to, or reduce, early-age cracking in concrete bridge decks and to assess the effect of. The ACI model is used for describing the concrete behavior, and the unit weights of concrete and steel are assumed to be t/m 3 and t/m 3, variations of positive and negative moments at the midspan and the interior support during deck construction are shown in Fig.
3, Fig. these figures, the dotted line and the solid line represent the moment variations before and. Possible to design for continuous behavior for superimposed dead and live loads “Deck Only” continuity Only the deck is continuous Spans behave as a series of simple spans “No C.I.P.
Deck” continuity Continuous beam behavior without a c.i.p. concrete deck. concrete to the new portion of the deck are used. References (1) Hilsdorf, H. and Lott, J. L., "Revibration of Retarded Concrete for Continuous Bridge Decks", NCHRP ReportHighway Research Board, Washington, D.C., (67 pgs.).
The published version of this report may be obtained by addressing your request as follows. bottom of the bridge deck in the primary direction.
Shear Effects. By using the strip method, an 8-in. deck is designed for flexure, and shear effects can be neglected. Figure. A illustrates the cross section of a typical beam-slab bridge with four beams spaced at 10 ft, a minimum-depth 8-in. concrete deck, and concrete railings. There was considerabie uncertainty in the use of retarders to aid bridge deck placement, and resear0h was undertaken resulting in NCHRP Report No.
"Revibration of Retarded Concrete for Continuous Bridge Decks" C5). One of the major findings. The precast deck panel system is designed using the strip design method, where a transverse strip of the deck is analyzed as a continuous beam supported by the bridge girders.
The girders are considered rigid supports with no settlement. The strip method concept results in providing the main reinforcement in the transverse direction of the deck. The study showed that cracking of bridge decks is variable within the same bridge and even within the same concrete placement, indicating that there are many factors that affect the cracking performance of a bridge deck that change during the construction of the bridge.
The performance based specification was first implemented in mid and. CONTINUOUS PRECAST CONCRETE GIRDER AND SLAB BRIDGE DECKS. The availability of powerful means of lifting and transportation, high-performance building materials and refined structural analysis methods, along with the use in the same structure of pretensioning, post-tensioning, prefabrication and in situ construction techniques, has led to considerable changes in the design and.
Figure – Standard construction joint for GDOT continuous deck detail GDOT Continuous Bridge Deck Detail, Description and History The GDOT detail evolved into its current design since it was first introduced in Mr.
Mike Clements of the Bridge Maintenance Office described the history of the GDOT continuous bridge deck design.
Based on forced vibration tests for high-performance concrete (HPC), the influence of bridge vibration induced by traveling vehicle on compressive strength and durability of HPC has been studied.
It is concluded that 1 d and 2 d compressive strength of HPC decreased significantly, and the maximum reduction rate is %, while 28d compressive strength of HPC had a slight lower with a 3. Table of Contents Section Page concrete bridge decks.
Measures to enhance the durability of concrete components, in particular, are discussed in Article The distress of bridge decks, and their premature replacement, has become a serious problem in the United States.
In Articlethe LRFD. methods for concrete deck removal that preserve bridge superstructures and substructures. Research Methodology • Review literature about removing concrete decks from concrete and steel girders including state-of-the-art and state-of-the practice for the following: • Deck removal methods and equipment • Steel girder damage and repair.
Get this from a library. Reinforcement for concrete bridge decks. [David B Beal; New York (State). Engineering Research and Development Bureau.; United States. Federal Highway Administration.] -- Laboratory tests of reduced-scale bridge decks and field tests of full-scale decks were performed to demonstrate the strength and serviceability of isotropic reinforcement.
amount of cracking in bridge decks. The factors are sum-marized in Tables 1 through 3 with brief descriptions as to how they can positively or negatively affect the degree of deck cracking.
Table 1. Relationships of material properties/proportions and concrete deck cracking Concrete Deck Material/Mixture Factors Effects on Concrete Deck Cracking. Our bridge deck finishers are becoming the choice for high-volume bridge and pavement pours. Three models are available with many accessories, so there’s an allen finisher for every bridge and pavement pour.
OPTIONS & ACCESSORIES. OPERATOR'S CONSOLE ENGINE. Kohler® CH ( cc) Kohler® CH ( cc) HORSEPOWER CLASS. HP ( kW).close to segmental concrete bridges have been built or are under construction, with spans up to m ( ft). Late in the s, cable-stayed construction raised the bar for concrete bridges.
Bythe Sunshine Skyway Bridge in Tampa, Florida, had set a new record for concrete bridges, with a main span of m (1, ft).Bridge Deck Cracking Investigation and Repair Vidal Velez Vargas University of North Florida bridge and transportation engineering community which is the deterioration of concrete bridge decks.
The causes of early age cracking are varied but are primarily attributed to effects such as plastic shrinkage, temperature effects, autogenous.