4 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
by Dept. of Civil Engineering, University of Illinois in Urbana
Written in English
|Statement||by H. K. Hilsdorf and J. L. Lott.|
|Series||Civil engineering studies; structural research series, no. 356, Civil Engineering studies., no. 356.|
|Contributions||Lott, James L., joint author., National Cooperative Highway Research Program.|
|LC Classifications||TG335 .H56|
|The Physical Object|
|Pagination||xv, 100 p.  p. of illus.|
|Number of Pages||100|
|LC Control Number||79630550|
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. K. and Lott, J. L., "Revibration of Retarded Concrete for Continuous Bridge Decks", NCHRP Report , Highway 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. 2. 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. .
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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 Distribution 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.
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. 2. 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.
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