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Author : Alfred G. Bishara
Publisher :
ISBN 13 :
Total Pages : 118 pages
Book Rating : 4.:/5 (359 download)
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:
Author : Bishara, Alfred G.
Publisher :
ISBN 13 :
Total Pages : 96 pages
Book Rating : 4.:/5 (589 download)
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:
Author : W. P. Chamberlin
Publisher :
ISBN 13 :
Total Pages : 291 pages
Book Rating : 4.:/5 (952 download)
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:
Author : Delmo E. Koop
Publisher :
ISBN 13 :
Total Pages : 40 pages
Book Rating : 4.3/5 (555 download)
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.
Author :
Publisher :
ISBN 13 :
Total Pages : 48 pages
Book Rating : 4.:/5 (111 download)
Download or read book Performance of latex modified and low slump concrete overlays on bridge decks written by and published by . This book was released on 1984 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. G. Russell
Publisher : Transportation Research Board
ISBN 13 : 0309070112
Total Pages : 188 pages
Book Rating : 4.3/5 (9 download)
Download or read book Concrete Bridge Deck Performance written by H. G. Russell and published by Transportation Research Board. This book was released on 2004 with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.
Author : Osama Ahmed Abdulshafi
Publisher :
ISBN 13 :
Total Pages : 286 pages
Book Rating : 4.3/5 (555 download)
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.
Author : Shibin Lin
Publisher :
ISBN 13 :
Total Pages : 246 pages
Book Rating : 4.:/5 (125 download)
Download or read book Nondestructive Evaluation of Concrete Bridge Decks with Overlays written by Shibin Lin and published by . This book was released on 2021 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete bridge deck overlays have been used in the United States since 1960 to extend the service life of deteriorated concrete bridge decks and improve reliability. Concrete bridge decks with overlays suffer various types of deterioration, so it is necessary to identify and assess the effectiveness of different nondestructive evaluation (NDE) technologies in the laboratory under controlled conditions and in the field under actual conditions. This report provides an overview of seven types of widely used overlays: asphalt with a liquid membrane, asphalt with a fabric membrane, asphalt without a membrane, silica fume-modified concrete, latex-modified concrete (LMC), epoxy polymer concrete, and polyester polymer concrete. This report identifies and ranks available and promising NDE technologies to assess the performance of different types of overlays and concrete bridge decks. This report describes laboratory validation on overlays for nine commonly used NDE technologies. The nine NDE technologies are: sounding, ultrasonic surface waves (USW), impact echo (IE), ultrasonic tomography (UT), impulse response (IR), ground-penetrating radar (GPR), electrical resistivity (ER), half-cell potential (HCP), and infrared thermography (IRT). This report details the results of laboratory tests validating the NDE technologies for the seven different types of overlays. Field validation using the RABITTM bridge deck assessment tool and manual testing equipment was also performed. Results from the study on which this report is based indicated that GPR was the most effective method for detecting defects in underlying concrete specimens through both bonded and debonded overlays; however, GPR could not detect overlay debonding. Results also showed that USW, IE, and UT were effective stress-wave-based methods for detecting defects under bonded overlays but not asphalt overlays. Researchers found that asphalt overlays at low temperatures (i.e., 32°F or below) improved the applicability of
Author : V. Ramakrishnan
Publisher : Transportation Research Board
ISBN 13 : 9780309053037
Total Pages : 76 pages
Book Rating : 4.0/5 (53 download)
Download or read book Latex-modified Concretes and Mortars written by V. Ramakrishnan and published by Transportation Research Board. This book was released on 1992 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: This synthesis wil be of interest to materials engineers, construction engineers, maintenance engineers, pavement contractors and others interested in the use of latex-modified mortars (LMM) and concretes ( LMC). Information is provided on material properties of various LMM and LMC, as well as current construction practices used for LMM and LMC. Potential applications for LMM and LMC are also included. The use of innovative modified portland cement mortars and concretes for construction and maintenance applications is growing. This report of the Transportation Research Board describes the current state of the practice with respect to the use of latex-modified portland cement concretes and mortars. The extent of use of each material (including case histories), based on results of surveys of state highway agencies and a review of the literature, is summarized.
Author : Missouri. Highway and Transportation Department. Division of Materials and Research
Publisher :
ISBN 13 :
Total Pages : 72 pages
Book Rating : 4.:/5 (952 download)
Download or read book Performance of Latex Modified and Low Slump Concrete Overlays on Bridge Decks written by Missouri. Highway and Transportation Department. Division of Materials and Research and published by . This book was released on 1992 with total page 72 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Ray Lundy
Publisher :
ISBN 13 :
Total Pages : 38 pages
Book Rating : 4.3/5 (555 download)
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:
Author : MM. Sprinkel
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (125 download)
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.
Author : Suvimol Sujjavanich
Publisher :
ISBN 13 :
Total Pages : 294 pages
Book Rating : 4.:/5 (382 download)
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.
Author : Waterways Experiment Station (U.S.) Structures Laboratory
Publisher :
ISBN 13 :
Total Pages : 616 pages
Book Rating : 4.E/5 ( download)
Download or read book Technical Report SL- written by Waterways Experiment Station (U.S.) Structures Laboratory and published by . This book was released on 19?? with total page 616 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bundesanstalt für Arbeit Landesarbeitsamt Rheinland-Pfalz-Saarland
Publisher :
ISBN 13 :
Total Pages : 37 pages
Book Rating : 4.:/5 (64 download)
Download or read book Berufsberatung written by Bundesanstalt für Arbeit Landesarbeitsamt Rheinland-Pfalz-Saarland and published by . This book was released on 1986 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sportlehrerausbildung, ESSM, Hochschule, Sportstudium.
Author : D. Huston
Publisher : CRC Press
ISBN 13 : 1420012355
Total Pages : 664 pages
Book Rating : 4.4/5 (2 download)
Download or read book Structural Sensing, Health Monitoring, and Performance Evaluation written by D. Huston and published by CRC Press. This book was released on 2010-09-21 with total page 664 pages. Available in PDF, EPUB and Kindle. Book excerpt: Structural health monitoring (SHM) uses one or more in situ sensing systems placed in or around a structure, providing real-time evaluation of its performance and ultimately preventing structural failure. Although most commonly used in civil engineering, such as in roads, bridges, and dams, SHM is now finding applications in other engineering envir
Author : Marvin Henry Hilton
Publisher :
ISBN 13 :
Total Pages : 15 pages
Book Rating : 4.:/5 (191 download)
Download or read book Latex Modified Portland Cement Overlays written by Marvin Henry Hilton and published by . This book was released on 1975 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report describes an evaluation of the latex modified mortar overlay the Route 85 (NBL) bridge over the Roanoke River. While the performance of the overlay has been generally satisfactory, corings and chloride analyses indicate the possibility of future distress beyond the cracking that has been noted to date The problems associated with the overlay have not resulted from the nature of the latex modified mortar nor from a failure of bond between the material and the original deck. Instead the results suggest that the deterioration is due to the use of a insufficient thickness of overlay in conjunction with the inadequate preparation of an original deck that had been previously subjected to chloride penetration. Based on the evaluation of several cores taken from the deck it cannot be recommended that thin layers of this material be used as a long-term solution for bridge deck deterioration problems where the decks have experienced prior corrosion of the reinforcing steel from chloride attack.
