2 edition of Silica fume latex modified concrete bridge deck overlay found in the catalog.
Silica fume latex modified concrete bridge deck overlay
Eric W. Brooks
|Other titles||Tualatin River Bridge #1417N.|
|Statement||by Eric W. Brooks.|
|Series||Experimental features project -- no. 93-05., Experimental features report -- no. 93-05/final.|
|Contributions||Oregon. Dept. of Transportation. Research Unit., United States. Federal Highway Administration.|
|The Physical Object|
|Pagination||36 p. in various pagings :|
|Number of Pages||36|
High-strength concrete enhanced with silica fume provides architects and engineers with greater design flexibility. Traditionally used in high-rise buildings for the benefit of smaller columns (increasing usable space) high-strength concrete containing silica fume is often used in precast and prestressed girders allowing longer spans in structural bridge designs. Latex Modified Concrete (LMC) is considered the “ideal repair material” and is primarily used as a thin bonded overlay to protect bridge decks and parking structures. As Latex Modified Concrete cures, the polymer forms internal plastic films and provides the following improvements to the concrete surface: Low Permeability.
Restrained microsilica concrete specimens generally cracked earlier and more frequently than restrained latex-modified concrete specimens. However, the bridge deck crack and delamination surveys show that conditions and quality of construction and type and frequency of traffic may have a greater effect on cracking than the overlay material. Highway Concrete Pavement Technology Development and Testing Volume V:Field Evaluation of SHRP C Test Sites (Bridge Deck Overlays) Primary Topic: Materials-Concrete. Description: Two types of concrete overlays silica fume concrete (SFC) and latex-modified Type III portland cement concrete (LMC-III) were installed and tested as part of the.
overlays, including but not limited to asphalt concrete, high-density concrete, silica fume concrete, latex-modified concrete, and various types of polymer concrete (Doody and Morgan ). Polyester polymer concrete (PPC) is one type of polymer concrete that has been successfully used for bridge deck overlays. PPC consists of a polyester-based. Whereas, rehabilitative overlays, specifically latex-modified concrete, silica-fume, and very-early strength latex-modified concrete overlays, were predicted to serve 21–32 years. These results are in general agreement with earlier nationwide studies of epoxy and latex modified concrete overlays on bridge decks.
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Latex-modified concrete was developed in the s for bridge deck overlays, and since then o bridges have been successfully rehabilitated. LMC also has been used to renovate roadways, parking decks, marine structures and even major league sports stadiums.
In the s, silica fume, or microsilica, was introduced in the U.S. as a. Title: Rapid Concrete Bridge Deck Overlays Author(s): M.M. Sprinkel Publication: Symposium Paper Volume: Issue: Appears on pages(s): Keywords: overlays, polymer modified concrete, bridges, decks, latex, silica fume Date: 3/1/ Abstract: Hydraulic cement concrete overlays made with latex-modified concrete (LMC) and silica fume concrete Cited by: 1.
deck overlay consisting of latex modified portland cement concreteoverlayLMC, latex, modified concrete very early strength, LMC-VE, or silica fume modified concrete, SFMC, on an existing or new bridge deck, or it shall consist of patching an existing latex modified portland cement concrete overlay on a bridge deck in accordance with File Size: KB.
A project using a silica-fume concrete bridge deck overlay is described in the projects portion of this presentation. FINAL REPORT EVALUATION OF LATEX-MODIFIED AND SILICA FUME final report evaluation of latex-modified and silica fume concrete overlays placed on six bridges in virginia michael sprinkel, p.e.
research manager. A study of the chloride permeability of rigid concrete bridge deck overlays was conducted during the construction season.
A total of thirteen latex-modified concrete (LMC) overlays, ten superplasticized dense concrete (SDC) overlays, and two condensed silica fume concrete (CSFC) overlays, were investigated. construction time.
This alternative is a full-depth silica fume concrete bridge deck. Six full-depth silica fume concrete bridge decks were constructed in Minnesota between and These bridge decks were monitored both during construction and after construction to evaluate their constructability and performance.
Materials that have been employed for bridge deck overlay includes latex modified concrete, low water to cement ratio hydraulic cement concrete mixtures, and Portland cement mixture in which a specific amount of cement is replaced by silica fume. The future performance of rehabilitative overlays such as latex-modified concrete, silica fume, and VELMC overlays will not be influenced by the presence of bridge deck damage prior to overlaying.
This might be because of the removal of deteriorated concrete before these rigid overlays are constructed. Bridge Deck Overlays - Federal Highway Administration - Video VHE - This video begins with a discussion of deck condition, including inspection techniques, and then moves on to overlay.
Provide Silica Fume Modified Concrete (SFMC) or Latex Modified Concrete (LMC) for concrete bridge deck overlay. Construction. Equipment. Equipment for Preparation of Existing Concrete.
Sawing Equipment. Provide sawing equipment capable of sawing concrete to the depth required by the contract. Scarifying Equipment. Many state DOTs have adopted silica fume in their specifications for concrete for bridge deck overlays or for new bridge construction.
A project using a silica-fume concrete bridge deck overlay is described in the projects portion of this presentation. The Silica Fume Association Sierra Lane, Lovettsville, VA of latex, resulting in a latex modified concrete overlay.
In the mid s silica fume was introduced to the concrete mix design, this design was generally only used with deep overlays.
The application of an overlay is implemented with respect to the most current bridge deck preservation matrix (Appendix Fig ). According to the most current. Silica fume modified concrete (SFMC) is a concrete mixture used in rigid overlays to decrease the permeability of the concrete and thus increase the durability of the bridge deck.
Silica fume is defined by the American Concrete Institute as “very fine non-crystalline silica produced in electric arc furnaces as a by-product of the production.
This interim report presents information collected from 24 bridge deck overlays constructed in Oregon between and Decks were placed on a variety of existing structures using hydroblasting, milling and diamond grinding surface preparation. All decks were latex or microsilica modified concrete.
concrete overlays (also see Section and the Bridge Deck Preservation Matrix): A. Shallow Overlays Shallow overlays are a medium term fix. They are designed to last approximately 10 to 15 years. Shallow overlays consist of a latex modified, or silica fume modified concrete overlay mixture placed a minimum of 1½” in thickness.
Rehabilitation of a deteriorating bridge deck generally requires removing and replacing damaged concrete. Restoring smoothness to a repaired deteriorated deck may require an overlay.
Silica fume concrete, latex-modified concrete and low-slump dense concrete are some of the products which have been tried on bridge deck overlays(3). Why Latex Modified Concrete Is Used For Cold Climate Bridge Deck Overlays.
Updated November In colder climates, bridge decks undergo a freeze-thaw cycle more severe than other types of concrete infrastructure. This is because they’re exposed to weather conditions on the top and bottom, unlike sidewalks and other concrete flatwork.
Placing Bridge Deck Overlay Concrete. Verify that the silica fume modified concrete is falling less than 6 inches from the discharge chute to the uppermost steel reinforcement or existing bridge deck surface.
For latex-modified concrete, the fall height of the mix is dependent on the air content and will vary. [top of page]. bridge deck overlay, concrete additives, bridge deck repairs, LMC, latex modified concrete, microsilica concrete, silica flume, Skagit County, Washington state. A study of the chloride permeability of rigid concrete bridge deck overlays was conducted during the construction season.
A total of thirteen latex-modified concrete (LMC) overlays, ten superplasticized dense concrete (SDC) overlays, and two con densed silica fume concrete (CSFC) overlays, were investigated. Latex-modified and silica fume concrete overlays were placed on six bridges on I south of Emporia, Virginia, in the fall of The construction was funded with 20% Virginia Department of Transportation maintenance funds and 80% special ISTEA Section federal funds specifically allocated to demonstrate overlay technologies.INSTRUCTIONS FOR SETTING UP AN OPTIONAL BID FOR BRIDGE DECK OVERLAY MATERIALS Latex Modified and Microsilica Concrete 1.
Include the following Material Notes in the plan set: Include RSP B Silica Fume Modified Structural Concrete Bridge Deck Overlay in the contract documents.This paper discussed the properties of styrene butadiene rubber (SBR) latex modified concrete with silica fume as partial replacement of cement.
The latex modified concrete using SBR latex were prepared with various polymer-binder ratio and 8% silica fume contents, and tested for compressive strength, flexure strength and elastic modulus.