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Accelerated Aging Of Concrete
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Book Synopsis Accelerated Aging of Concrete by : Roberto Caldas Pinto
Download or read book Accelerated Aging of Concrete written by Roberto Caldas Pinto and published by . This book was released on 2002 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides a review of the literature on accelerated aging of concrete. It was undertaken as part of a research project on predicting the long-term environmental performance of portland cement concrete (PCC) pavements containing coal fly ash. An accelerated aging regime involving temperature, cyclic loading, and freeze-thaw cycles was employed in this project to simulate natural long-term aging processes. This literature review describes the general concept of aging of materials and defines accelerated aging. It describes accelerated aging procedures and applications of accelerated aging, and discusses thermal aging, the most common accelerated aging technique. Accelerated aging techniques and applications for several types of materials (i.e., metals, polymers, asphalts, wood, and masonry) are described, followed by a review of accelerated aging procedures and applications for PCC.
Book Synopsis The Effects of Accelerated Aging on Three Types of Portland Cement Concrete by : Anthony David Coviello
Download or read book The Effects of Accelerated Aging on Three Types of Portland Cement Concrete written by Anthony David Coviello and published by . This book was released on 2000 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Assessment of an Accelerated Aging Method for the Prediction of the Environmental Performance of Portland Cement Concrete Containing Coal Fly Ash by : Jean C. M. Spear
Download or read book Assessment of an Accelerated Aging Method for the Prediction of the Environmental Performance of Portland Cement Concrete Containing Coal Fly Ash written by Jean C. M. Spear and published by . This book was released on 2000 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Fibrous Concrete by : Concrete Society
Download or read book Fibrous Concrete written by Concrete Society and published by . This book was released on 1980 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bond Life of Structural Epoxy-concrete Systems Under Accelerated Hygrothermal Aging by : Philip Wallace Hopkins
Download or read book Bond Life of Structural Epoxy-concrete Systems Under Accelerated Hygrothermal Aging written by Philip Wallace Hopkins and published by . This book was released on 2020 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: A laboratory study was conducted to investigate possible quantitative and qualitative methods for determining the bond life of structural epoxies externally bonded to concrete substrates. Three concrete mixtures, two surface preparation methods, and three structural epoxies were used creating eighteen combinations of bonded systems. Direct tension (pull-off) specimens were prepared from which a subset was submerged in heated water per a prescribed accelerated aging protocol for up to 200 days. A novel test fixture was designed to facilitate controlled-rate testing of the pull-off specimens. A total of 324 specimens were intermittently removed from submersion exposure and tested without replacement. An additional 12 concrete prisms were used to determine the direct tensile strength of the various substrates. Additional characterization testing was conducted for use in determining the significant factors contributing to changes in bond strength. These tests included concrete compressive strength and concrete surface profilometry. Bulk epoxy and concrete moisture uptake data was also generated for future use. Plots of the raw data imply bond strength decreases at a relatively rapid rate during early aging then slows with longer exposure periods. Analysis of variance testing was conducted as part of a multiple regression analysis which found that square root of concrete strength, square root of aging time, mean peak height, and matrix tensile strength were significant in explaining variations in bond strength. A numerical model was produced based on raw data from the significant factors. The raw data did exhibit instances of high variability (>10%). The fitted model was shown with a coefficient of determination of 63% but implied rapid initial decreasing strength which agreed with apparent trends in the plotted raw data. Bond life was calculated for each study combination as the point in aging time where bond strength decreases beneath the substrate tensile strength. Methods for transforming data points in order to lower variability were investigated but were shown to be inaccurate and impractical. To provide a direct comparison of bond strength values, isolation of bond strength in mixed-mode specimens was attempted but was determined to not be possible without impractical, complex methods. This conclusion implies that chemical bond and mechanical interlock may not readily be decoupled without similar intensive methods. A secondary objective was to determine bond life through a failure mode analysis approach. An alternative set of pull-off failure modes was first proposed to facilitate further discussion. Inconsistencies in mixed-mode specimen surfaces were noted by the author in previous studies that warranted the secondary investigation. New bi-directional fracture path behavior is conceptually posed which is preliminarily confirmed. This finding implies that the A6 failure mode may be used as an early indicator of impending termination of bond life. Collectively, conclusions from this study indicate key factors that affect bond strength, provide insight into bond degradation behavior under accelerated hygrothermal conditions, present a means for conducting controlled rate bond testing, and offer a quick and robust method for determining the onset of bond life in epoxy-concrete systems without the need for complex analyses or additional characterization testing.
Book Synopsis Accelerated Aging of Stabilized Hazardous Wastes by :
Download or read book Accelerated Aging of Stabilized Hazardous Wastes written by and published by . This book was released on 1999 with total page 136 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Durability Characteristics of Polymer-modified Glass Fiber Reinforced Concrete by : Makoto Yohena
Download or read book Durability Characteristics of Polymer-modified Glass Fiber Reinforced Concrete written by Makoto Yohena and published by . This book was released on 1990 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Predictive Approach for Long-term Performance of Recycled Materials Using Accelerated Aging by :
Download or read book A Predictive Approach for Long-term Performance of Recycled Materials Using Accelerated Aging written by and published by . This book was released on 2001 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Use of recycled materials in a proposed highway application frequently requires the assessment of physical and environmental performance. Future behavior is often difficult to predict. As an alternative to field demonstrations, there is a need to develop strategies to predict long-term physical and environmental performance. Accelerated aging is one means of exploring the long-term physical and environmental performance of recycled materials in a highway. Coal fly ash (CFA) use in portland cement concrete (PCC) was selected as a model system to develop an accelerated aging approach. Three types of accelerated aging were chosen for this project: Arrhenius aging (AA), cyclic loading (CL), and freeze-thaw exposure (FT). This approach, incorporated in an experimental design, allowed a systematic exploration of the separate effects and combined interactions of both developmental and degradative accelerated aging variables. A slab from U.S. Route 20 in northwest Iowa was used as both the basis for the concrete mixes and as a field verification site.
Book Synopsis Accelerated Ageing of Cement Stabilised/solidified Contaminated Soils with Elevated Temperatures by : Burden Chitambira
Download or read book Accelerated Ageing of Cement Stabilised/solidified Contaminated Soils with Elevated Temperatures written by Burden Chitambira and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Accelerated Ageing of Cement Stabilised by : Burden Chitambira
Download or read book Accelerated Ageing of Cement Stabilised written by Burden Chitambira and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Implementing Rapid Durability Measure for Concrete Using Resistivity and Formation Factor by : W. Jason Weiss
Download or read book Implementing Rapid Durability Measure for Concrete Using Resistivity and Formation Factor written by W. Jason Weiss and published by . This book was released on 2020 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Properties of Some Lightweight-aggregate Concretes with and Without an Air-entraining Admixture by : Perry H. Petersen
Download or read book Properties of Some Lightweight-aggregate Concretes with and Without an Air-entraining Admixture written by Perry H. Petersen and published by . This book was released on 1948 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Problems in Service Life Prediction of Building and Construction Materials by : L.W. Masters
Download or read book Problems in Service Life Prediction of Building and Construction Materials written by L.W. Masters and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 289 pages. Available in PDF, EPUB and Kindle. Book excerpt: Degradation, the chemical/physical response of building and con struction materials exposed to in-service environments, must be predicted prior to their installation in structures if materials are to be effectively selected, used and maintained. These assessments of materials degradation require that methods be available to aid prediction of service life. The objectives of building materials science are a) to charac terize and categorize materials, b) to predict, preferably in a mathematical sense, material or component response including expected service life, and c) to make improvements in material response through improvements in design, formulation, processing or specification. For building and construction materials, continued progress has been made towards objective (a), but little progress has been made towards objectives (b) and (c). Of these, the mathematical prediction of service life appears to be of greater importance, because, if general approaches or models having application to a wide range of building and construction materials can be identi fied, then the categorization, selection, use and improvement of materials can proceed in a systematic manner. Researchers in advanced technologies, such as aerospace, nuclear, electronics and medicine, have apparently been more successful than researchers in building and construction technology in responding to the need for reliable predictions of service life.
Book Synopsis Glass Fibre Reinforced Cement by : Amal J. Majumdar
Download or read book Glass Fibre Reinforced Cement written by Amal J. Majumdar and published by . This book was released on 1974 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis An Approach to Improved Durability Tests for Building Materials and Components by : Geoffrey Frohnsdorff
Download or read book An Approach to Improved Durability Tests for Building Materials and Components written by Geoffrey Frohnsdorff and published by . This book was released on 1980 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Research Agenda for Test Methods and Models to Simulate the Accelerated Aging of Infrastructure Materials by : National Research Council
Download or read book Research Agenda for Test Methods and Models to Simulate the Accelerated Aging of Infrastructure Materials written by National Research Council and published by National Academies Press. This book was released on 1999-06-29 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the next several decades, a significant percentage of the country's transportation, communications, environmental, and power system infrastructures, as well as public buildings and facilities, will have to be renewed or replaced. Next-generation infrastructure will have to meet very high expectations in terms of durability, constructability, performance, and life-cycle cost. One way of meeting future expectations will be through improved, high-performance materials, but before new materials can be confidently deployed in the field, a thorough and comprehensive understanding must be developed of their long-term performance in a variety of applications and physical environments. The National Science Foundation (NSF) has launched an initiative to promote the development of innovative short-term laboratory or in-situ tests for making accurate, reliable predictions of the long-term performance of materials and requested that the National Research Council (NRC) conduct a workshop as a reconnaissance-level assessment of models and methods that are being used, or potentially could be used, to determine the long-term performance of infrastructure materials and components.
Book Synopsis ACI Manual of Concrete Practice by : American Concrete Institute
Download or read book ACI Manual of Concrete Practice written by American Concrete Institute and published by . This book was released on 2007 with total page 1294 pages. Available in PDF, EPUB and Kindle. Book excerpt:
