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Study Of High Density And Latex Modified Concrete Bridge Deck Overlays
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Book Synopsis Study of High Density and Latex Modified Concrete Bridge Deck Overlays by : Delmo E. Koop
Download or read book Study of High Density and Latex Modified Concrete Bridge Deck Overlays written by Delmo E. Koop and published by . This book was released on 1982 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portland cement concrete overlay surfacings for bridge decks which will effectively resist de-icing salt solution penetration are a major concern. The report compares the relative effectiveness of latex modified concrete and high density concrete overlays.
Book Synopsis Premature Failure of Latex Modified Concrete Bridge Deck Overlays in Ohio by : Osama Ahmed Abdulshafi
Download or read book Premature Failure of Latex Modified Concrete Bridge Deck Overlays in Ohio written by Osama Ahmed Abdulshafi and published by . This book was released on 1990 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is an investigation of the cause(s) of premature failure of latex modified concrete (LMC) bridge deck overlays in Ohio. Data and materials for 93 bridge decks overlaid with LMC were collected from five Ohio Department of Transportation Districts. Additional materials were collected and evaluations were conducted through monitoring the construction of seven LMC bridge deck overlays. Overall documentation and evaluation of the overlays and materials obtained are discussed; this includes field survey activities, construction monitoring and laboratory testing and analysis. Characteristics of the LMC mixtures and materials are evaluated and compared to acceptable standards. General findings were that most of the problems were due to the underlying old deck which was contaminated with chloride ions, previously undetected due to insufficient testing. Other conclusions are presented separately under construction monitoring, field surveys, and laboratory testing and analysis.
Book Synopsis Investigation of Latex Modified Concrete Bridge Deck Overlays by : R. K. Smutzer
Download or read book Investigation of Latex Modified Concrete Bridge Deck Overlays written by R. K. Smutzer and published by . This book was released on 1979 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Latex Modified Concrete Bridge Deck Overlays-field Performance Analysis: Main report by : Alfred G. Bishara
Download or read book Latex Modified Concrete Bridge Deck Overlays-field Performance Analysis: Main report written by Alfred G. Bishara and published by . This book was released on 1979 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Early Age Performance of Latex-modified Concrete Bridge Deck Overlays by : Suvimol Sujjavanich
Download or read book Early Age Performance of Latex-modified Concrete Bridge Deck Overlays written by Suvimol Sujjavanich and published by . This book was released on 1996 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: Environmental factors and physical properties of latex modified concrete (LMC) are hypothesized to contribute to early age cracking in bridge deck overlays. Cracking permits the ingress of moisture and aggressive solutions into the substrate and may contribute to other subsequent distresses. Understanding the material properties and mechanisms involved is necessary to minimize these distresses. This research consisted of a two part study: first, the development of LMC strength and fracture properties at ages ranging from 5 hours to 28 days was studied, and secondly, the effects of the environment on LMC distresses were modelled. Environmental conditions: temperature, solar energy, and wind speed were determined from weather records. A fracture mechanics based model, the Fictitious Crack Model (FCM), incorporating finite element analyses and superposition techniques was employed with material properties from the first part of study on LMC performance. Different bilinear strain softening diagrams were used to predict fracture performance at different ages. The predictions agreed well with the test data. The impacts of temperature differentials on crack development were studied. The shrinkage effect was also indirectly incorporated through the temperature analysis. The material properties study indicated significant changes in strength, deformability and fracture properties, particularly during the early age. The developments differ slightly from conventional concrete. Test results indicated a significant improvement in reducing and bridging microcracks, especially in the prepeak-load region. Fracture toughness and deformability increased significantly with time. Fracture energy varied from 2.3 to 133.1 N/m, depending on age, and to some degree, on notch depth ratio. In the second stage, the FCM provided a reasonable prediction for crack initiation and propagation when only temperature effects are of concern. Age, surface conditions and structural restraint strongly affect crack resistance of the overlays. Only slight effects were observed from the overlay thickness in the study range (51-76 mm). Shallow preexisting cracks possibly reduce the crack resistance of the overlay about 30 percent. A prolonged moist cure for 48 hours after placing is suggested to reduce the risk of cracking. With available environmental information, it is possible to develop guidelines for appropriate environmental conditions for LMC bridge deck construction to minimize the risk of early age cracking.
Book Synopsis Latex and Microsilica Modified Concrete Bridge Deck Overlays in Oregon by : James Ray Lundy
Download or read book Latex and Microsilica Modified Concrete Bridge Deck Overlays in Oregon written by James Ray Lundy and published by . This book was released on 1997 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Latex Modified Concrete Bridge Deck Overlays by : Bishara, Alfred G.
Download or read book Latex Modified Concrete Bridge Deck Overlays written by Bishara, Alfred G. and published by . This book was released on 1979 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Federally Coordinated Program of Highway Research, Development and Technology by :
Download or read book Federally Coordinated Program of Highway Research, Development and Technology written by and published by . This book was released on 1983 with total page 838 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Long-term Performance of Polymer Concrete for Bridge Decks by : David W. Fowler
Download or read book Long-term Performance of Polymer Concrete for Bridge Decks written by David W. Fowler and published by Transportation Research Board. This book was released on 2011 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 423: Long-Term Performance of Polymer Concrete for Bridge Decks addresses a number of topics related to thin polymer overlays (TPOs). Those topics include previous research, specifications, and procedures on TPOs; performance of TPOs based on field applications; the primary factors that influence TPO performance; current construction guidelines for TPOs related to surface preparation, mixing and placement, consolidation, finishing, and curing; repair procedures; factors that influence the performance of overlays, including life-cycle cost, benefits and costs, bridge deck condition, service life extension, and performance; and successes and failures of TPOs, including reasons for both.
Book Synopsis Bridge Deck Overlays with Latex Modified Concrete by : South Dakota. Division of Highways
Download or read book Bridge Deck Overlays with Latex Modified Concrete written by South Dakota. Division of Highways and published by . This book was released on 1980 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Field Performance of Latex-modified and Low-slump Dense Concrete Bridge Deck Overlays in the United States by : W. P. Chamberlin
Download or read book Field Performance of Latex-modified and Low-slump Dense Concrete Bridge Deck Overlays in the United States written by W. P. Chamberlin and published by . This book was released on 1994 with total page 291 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Performance of Concrete Bridge Deck Overlays by : Chris Anderson
Download or read book Performance of Concrete Bridge Deck Overlays written by Chris Anderson and published by . This book was released on 1990 with total page 64 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chloride-ions penetrating into bridge decks and corroding the steel have been a major problem. As the steel corrodes it exerts stresses on the surrounding concrete. When the stresses exceed the strength of the concrete, cracks or delaminations occur. This, of course, causes deterioration and spalling of bridge deck surfaces. Both the Latex and Iowa Method were used to repair bridge decks for this project. The concrete was removed down to the steel and replaced with approximately 1 1/2 inches of low slump or latex modified concrete. The removal of unsound concrete below the top layer of steel was sometimes necessary. The objective of this project was to determine if the bridge overlays would provide a cost effective method of rehabilitation. To do this, unsound and delaminated concrete was removed and replaced by an overlay of low slump or latex modified concrete.
Book Synopsis Latex and Microsilica Modified Concrete Bridge Deck Overlays in Oregon by : James Ray Lundy
Download or read book Latex and Microsilica Modified Concrete Bridge Deck Overlays in Oregon written by James Ray Lundy and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Building Deck Waterproofing by : Laura E. Gish
Download or read book Building Deck Waterproofing written by Laura E. Gish and published by ASTM International. This book was released on 1990 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Architects, specifiers, contractors, and manufacturers in the waterproof industry cover the basics (including cathodic protection terminology, systems, and history), problem-solving in the field and in the lab, and perceived problem areas and proposed solutions. From the symposium of the same name h
Book Synopsis Twenty-Year Performance of Latex-Modified Concrete Overlays by : MM. Sprinkel
Download or read book Twenty-Year Performance of Latex-Modified Concrete Overlays written by MM. Sprinkel and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fourteen bridge decks with latex-modified concrete (LMC) overlays ranging in age from two to twenty years and two overlays without latex were studied. The high quality portland cement concrete overlays without latex showed greater negative increases in half-cell potentials, greater increases in chloride content, and a higher percentage of higher rates of corrosion than the LMC overlays. Also, for these two bridges, higher shear and tensile rupture strengths were obtained at the bond interface with LMC than with concrete without latex. Higher rupture strengths were not obtained on the other bridges because of the low strength of the scarified surface of the base concrete. The permeability, half-cell, chloride, rate-of-corrosion, and bond, strength data indicate that the overlays are performing satisfactorily. Also, LMC overlays placed on decks with less than 2 lb/yd3 (1.2 kg/m3) of chloride ion at the rebar can be expected to have a service life in excess of twenty years.
Book Synopsis Evaluation of Concrete Overlays for Bridge Applications by : Khossrow Babaei
Download or read book Evaluation of Concrete Overlays for Bridge Applications written by Khossrow Babaei and published by . This book was released on 1987 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High Performance Concrete Bridge Deck Overlays for County Bridges by : Edward J. Engle
Download or read book High Performance Concrete Bridge Deck Overlays for County Bridges written by Edward J. Engle and published by . This book was released on 2007 with total page 30 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Iowa Method for bridge deck overlays has been very successful in Iowa since its adoption in the 1970s. This method involves removal of deteriorated portions of a bridge deck followed by placement of a layer of dense (Type O) Portland Cement Concrete (PCC). The challenge encountered with this type of bridge deck overlay is that the PCC must be mixed on-site, brought to the placement area and placed with specialized equipment. This adds considerably to the cost and limits contractor selection. A previous study (TR-427) showed that a dense PCC with high-range water reducers could successfully be used for bridge deck overlays using conventional equipment and methods. This current study evaluated the use of high performance PCC in place of a dense PCC for work on county bridges. High performance PCC uses fly ash and slag to replace some of the cement in the mix. This results in a workable PCC mix that cures to form a very low permeability overlay.
