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Supplementary Cementitious Materials To Enhance Durability Of Concrete Bridge Decks
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Book Synopsis Guidelines for Concrete Mixtures Containing Supplementary Cementitious Materials to Enhance Durability of Bridge Decks by : John S. Lawler
Download or read book Guidelines for Concrete Mixtures Containing Supplementary Cementitious Materials to Enhance Durability of Bridge Decks written by John S. Lawler and published by Transportation Research Board. This book was released on 2007 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt: NCHRP Report 566 is designed to help facilitate the use of supplementary cementitious materials to enhance durability of concrete used in highway construction, especially bridge decks. The report includes a methodology for selecting optimum concrete mixture proportions that focuses on durability aspects of concrete and the performance requirements for specific environmental conditions. The methodology is presented in a text format and as a computational tool, in the form of a Visual Basic?driven Microsoft Excel spreadsheet. Background information and a hypothetical case study was published as NCHRP Web-Only Document 110: Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks. The Statistical Experimental Design for Optimizing Concrete (SEDOC), the computational tool for the concrete mixture optimization methodology, and the user?s guide are available in a ZIP format for download.
Book Synopsis Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks by : John S. Lawler
Download or read book Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks written by John S. Lawler and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to develop a methodology for designing hydraulic cement concrete mixtures incorporating supplementary cementitious materials that will result in enhanced durability of cast-in-place concrete bridge decks. The research shall consider the use of fly ash, silica fume, slag, and natural pozzolans both singularly and in combination.
Book Synopsis Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks by : John S. Lawler
Download or read book Supplementary Cementitious Materials to Enhance Durability of Concrete Bridge Decks written by John S. Lawler and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this research is to develop a methodology for designing hydraulic cement concrete mixtures incorporating supplementary cementitious materials that will result in enhanced durability of cast-in-place concrete bridge decks. The research shall consider the use of fly ash, silica fume, slag, and natural pozzolans both singularly and in combination.
Book Synopsis Supplementary Cementitious Materials to Enhance Bridge Deck Durability by :
Download or read book Supplementary Cementitious Materials to Enhance Bridge Deck Durability written by and published by . This book was released on 2001 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Constituent Materials and Curing Methods on the Abrasion Resistance and Durability of High Performance Concrete for Pre-cast Pre-stressed Bridge Deck Slabs by : Shweta Keshari
Download or read book Effect of Constituent Materials and Curing Methods on the Abrasion Resistance and Durability of High Performance Concrete for Pre-cast Pre-stressed Bridge Deck Slabs written by Shweta Keshari and published by . This book was released on 2010 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is the consequence of a research effort undertaken by the School of Civil and Construction Engineering at Oregon State University and funded by the Oregon Department of Transportation (ODOT) and the Federal Highway Administration (FHWA). The principal objective of the effort was to reduce the life cycle cost of bridges by developing one or more materials systems for precast and pre-stressed bridge deck components that improve the studded tire wear (abrasion) resistance and durability of bridge decks. Degradation of the concrete bridge decks due to abrasion caused by the studded tires and accelerated corrosion of the reinforcing steel in the concrete often triggers costly, premature rehabilitation or replacement of these bridges. High performance concrete (HPC) can provide improved abrasion resistance, but is more costly than ordinary concrete and can exhibit early age cracking when used for cast-in-place concrete members, which can accelerate corrosion of embedded reinforcing steel. However, several studies have suggested that HPC developed for precast members offers a viable alternative to cast-in-place concrete deck slabs due in part to improved control of the curing process. The scope of this research was to develop one or more mixture designs for HPC that improve the durability and abrasion resistance of the bridge decks through careful selection and proper proportioning of the constituent materials and improved control of the curing process. The materials investigated in this research included silica fume, slag, and fly ash as partial replacement of Type I and Type III portland cement mixed with crushed aggregate and river gravel. Phase I of the study included development of 15 mixture designs incorporating various combinations of the materials. Mixtures were cast under controlled laboratory conditions and cured using a variety of methods. The results of tests conducted on the cured samples indicated that the mixture with silica fume and slag had greater strength than the mixture with silica fume and fly ash mixture, and that mixtures with crushed rock provided better abrasion resistance than those with river gravel. Results from the chloride ion penetration test for permeability indicated that mixtures cured in saturated lime water for 28 days exhibited reduced permeability in comparison to mixtures which were steam cured followed by ambient curing. Following phase I, a pilot study was undertaken to identify the best curing method to apply during production at precast yards to assist high early strength gain so that the concrete member can be removed from the casting bed in a matter of several hours as well as to facilitate high ultimate strength, improved abrasion resistance, and low permeability. The pilot study indicated the best curing method to be steam curing followed by application of a curing compound. Phase II of the research study included seven mix designs and focused on various levels of supplementary cementitious materials. It adopted the curing method suggested by the pilot study. Results from phase II indicated that slag was better in enhancing durability of the concrete than fly ash. Increasing the proportion of silica fume did not improve the properties of high performance concrete significantly. Some other interesting results indicated that compressive strength was inversely proportional to wear rate and chloride ion penetration. Wear rate was directly proportional to chloride ion penetration. There was no relationship between durability factor (freeze-thaw test) and compressive strength or chloride ion penetration. Two mixtures were identified as having significantly improved abrasion and permeability characteristics over the control mixture (ODOT bridge deck mixture). Both included slag and silica fume as supplementary cementitious materials as a partial replacement of portland cement and one did not contain an air entraining admixture.
Book Synopsis Abrasion-resistant Concrete Mix Designs for Precast Bridge Deck Panels by : Todd V. Scholz
Download or read book Abrasion-resistant Concrete Mix Designs for Precast Bridge Deck Panels written by Todd V. Scholz and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Fresh and Hardened Concrete Containing Supplementary Cementitious Materials by : Nele De Belie
Download or read book Properties of Fresh and Hardened Concrete Containing Supplementary Cementitious Materials written by Nele De Belie and published by Springer. This book was released on 2017-12-09 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents the current knowledge on the effect of SCMs (slag, fly ash, silica fume, limestone powder, metakaolin, natural pozzolans, rice husk ash, special SCMs, ternary blends) on the properties of fresh and hardened concrete (e.g. early strength development, workability, shrinkage) and curing requirements. Other topics treated in the book are postblending vs preblending, implications of SCM variability, interaction between SCM and commonly used admixtures (e.g. superplasticizers, air entrainers).
Book Synopsis Brittle Matrix Composites 9 by : A M Brandt
Download or read book Brittle Matrix Composites 9 written by A M Brandt and published by Elsevier. This book was released on 2009-11-30 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: The subjects of the symposia are on composite materials with matrices behaving as brittle in normal or special conditions. Brittle matrix composites are applied in various domains (civil engineering, mechanical equipment and machinery, vehicles, etc.) and in the last decades their importance is increasing together with their variety. Papers include: aggregate-binder composites (concretes, fibre concretes, rocks); sintered materials (ceramics); high strength composites with brittle matrices. In principle, the general problems of structures made of composite materials are not included in the papers. Various approaches to the material engineering problems are presented in the papers.
Book Synopsis Progress Report by : National Cooperative Highway Research Program
Download or read book Progress Report written by National Cooperative Highway Research Program and published by . This book was released on 2001 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Case Studies of Rehabilitation, Repair, Retrofitting, and Strengthening of Structures by : Mourad M. Bakhoum
Download or read book Case Studies of Rehabilitation, Repair, Retrofitting, and Strengthening of Structures written by Mourad M. Bakhoum and published by IABSE. This book was released on 2010 with total page 196 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability of Concrete Bridge Decks by : Portland Cement Association
Download or read book Durability of Concrete Bridge Decks written by Portland Cement Association and published by . This book was released on 1969-01-01 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability of Concrete Bridge Decks by : Portland Cement Association
Download or read book Durability of Concrete Bridge Decks written by Portland Cement Association and published by . This book was released on 1966-01-01 with total page 107 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Eco-efficient concrete written by M. Cyr and published by Elsevier Inc. Chapters. This book was released on 2013-02-04 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This chapter presents the effects of supplementary cementitious materials (SCMs) on properties affecting the durability of concrete (porosity, permeability), and on the major factors affecting concrete durability (alkali– silica reaction, delayed ettringite formation, sulphate attacks, acid attacks, frost resistance, abrasion, carbonation and chloride ingress). General trends and specific effects of ground-granulated blast-furnace slag, fly ash, silica fume and metakaolin, when used as cement replacement, are reported and discussed.
Book Synopsis Durability of Concrete Bridge Decks by : Portland Cement Association
Download or read book Durability of Concrete Bridge Decks written by Portland Cement Association and published by . This book was released on 1968-01-01 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Evaluation of the Performance of Concretes Containing Fly Ash and Ground Slag in Bridge Decks by : Daniel Stephen Lane
Download or read book An Evaluation of the Performance of Concretes Containing Fly Ash and Ground Slag in Bridge Decks written by Daniel Stephen Lane and published by . This book was released on 2006 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cores from 36 bridge decks were evaluated to assess the condition and quality of the concrete by petrographic methods and direct and indirect measures of the transport properties. Transport properties were measured by a rate of absorption test (ASTM C 1585) and by electrical conductance using the rapid chloride permeability apparatus (ASTM C 1202). The decks were distributed across Virginia to reflect the varied geographic and climatic regions. Two bridge age groups, each constructed under different specifications, were represented: (1) from 1968 through 1971, where portland cement concrete with a maximum specified water-cementitious material ratio (W/C) of 0.47 was used with uncoated reinforcing steel; and (2) from 1984 through 1991, where the specification required a maximum W/CM of 0.45, required epoxy-coated reinforcement, and allowed the use of fly ash or ground slag as supplementary cementitious materials. The older group included 10 decks, and the younger included 26. In the younger group, 8 were identified as containing fly ash and 7 were identified as containing slag. Five of the concretes exhibited excessively high spacing factors, suggesting susceptibility to freezing and thawing damage, although only two showed signs of such damage. Four of the decks exhibited excessively small spacing factors that could significantly affect strength. Signs of poor paste quality attributable to excessive water were noted in approximately one-third of the concretes. Cracking was of significance in 12 decks but was limited to paste cracking in 6; of these, 5 contained either fly ash or slag. Four showed signs of damage related to alkali-aggregate reactions, including 3 with carbonate rocks, 1 of which contained slag. A general assessment based on petrographic observations showed a fairly even distribution of good, fair, and poor ratings. Fly ash and slag concretes tended to have initial rates of absorption in the lower third, often despite their petrographic rating, suggesting they are providing beneficial reductions in transport properties in field concretes. The secondary (longer term) rate of absorption related better with the petrographic ratings, and the fly ash and slag concretes again tended to have lower rates. Of the fly ash and slag concretes exhibiting paste cracking, only one consistently had high absorption rates. In contrast to the rate of absorption results, the electrical conductivity results suggested little differences between the concretes, raising questions about its usefulness in evaluating mature field concretes. This study demonstrates the beneficial contributions that fly ash and ground slag as supplementary cementitious materials provide to concrete durability, and they should continue to be used as an integral part of efforts to increase the service life of concrete structures. ASTM C 1585 provides a direct measure of the transport properties of concrete and should be incorporated into both the concrete materials acceptance and asset evaluation and management programs.
Book Synopsis Silica Fume Concrete for Bridge Decks by : David Whiting
Download or read book Silica Fume Concrete for Bridge Decks written by David Whiting and published by Transportation Research Board. This book was released on 1998 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Review of Literature Treating Various Aspects of Bridge Deck Concrete Durability, Intermediate Report by :
Download or read book A Review of Literature Treating Various Aspects of Bridge Deck Concrete Durability, Intermediate Report written by and published by . This book was released on 1964 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
