Test Methods for Characterizing Air Void Systems in Portland Cement Pervious Concrete

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ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Test Methods for Characterizing Air Void Systems in Portland Cement Pervious Concrete by : John T. Kevern

Download or read book Test Methods for Characterizing Air Void Systems in Portland Cement Pervious Concrete written by John T. Kevern and published by . This book was released on 2009 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portland cement pervious concrete is becoming a common tool for stormwater management across the United States. The air void system in pervious concrete is particularly important because of its effect on stormwater infiltration, concrete strength, and long-term durability. However, currently the concrete industry lacks standardized testing techniques for characterizing air void systems in pervious concrete. In this paper a series of air system characterization tests performed during a field placement of pervious concrete is detailed, and the test results are compared. Fresh pervious concrete samples from two delivered mixtures were evaluated using pressure, volumetric, Chace, and air void analyzer air test methods. The hardened concrete samples were tested for water-permeable void content, water permeability, air voids (using ASTM Standard C457 method), and freeze-thaw durability (using ASTM Standard C666A method). Based on the results of the study, determination of air systems for the freeze-thaw protection of pervious concrete is proposed.

A Novel Approach to Characterize Entrained Air Content in Pervious Concrete

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ISBN 13 :
Total Pages : 10 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis A Novel Approach to Characterize Entrained Air Content in Pervious Concrete by : J. T. Kevern

Download or read book A Novel Approach to Characterize Entrained Air Content in Pervious Concrete written by J. T. Kevern and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The current pervious concrete placed in cold climates generally contains air entrainment but, unlike traditional concrete, the evaluation of entrained air is not performed. This paper presents results from a study that characterized the entrained air voids in pervious concrete using a RapidAir system. The RapidAir system is an automatic device that determines the air void properties of hardened concrete according to ASTM C457, "Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete." Two types of aggregates, i.e., crushed limestone and rounded river gravel (pea gravel), and two types of air entraining agents, i.e., natural and synthetic, were used. The air entrainment dosage rates varied from zero to double the manufacturer's recommended dosage. Compressive strength, tensile strength, and freeze-thaw durability (ASTM C666A) of the pervious concrete were tested. The results show that use of air entrainment improves workability of pervious concrete, thus reducing the overall porosity and increasing unit weight of the pervious concrete. The strength and freeze-thaw durability also increases with the level of entrained air in pervious concrete.

Microscopic Air Void Analysis of Hardened Portland Cement Concrete by the Isolated Shadow Technique

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ISBN 13 :
Total Pages : 864 pages
Book Rating : 4.E/5 ( download)

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Book Synopsis Microscopic Air Void Analysis of Hardened Portland Cement Concrete by the Isolated Shadow Technique by : Basil Mark Harris

Download or read book Microscopic Air Void Analysis of Hardened Portland Cement Concrete by the Isolated Shadow Technique written by Basil Mark Harris and published by . This book was released on 1998 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Urban Sustainability and River Restoration

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Publisher : John Wiley & Sons
ISBN 13 : 111924496X
Total Pages : 235 pages
Book Rating : 4.1/5 (192 download)

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Book Synopsis Urban Sustainability and River Restoration by : Katia Perini

Download or read book Urban Sustainability and River Restoration written by Katia Perini and published by John Wiley & Sons. This book was released on 2017-02-06 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: Urban Sustainability and River Restoration: Green and Blue Infrastructure considers the integration of green and blue infrastructure in cities as a strategy useful for acting on causes and effects of environmental and ecological issues. River restoration projects are unique opportunities for sustainable development and smart growth of communities, providing multiple environmental, economic, and social benefits.This book analyzes initiatives and actions carried out and developed to improve environmental conditions in cities and better understand the environmental impact of (and in) dense urban areas in the United States and in Europe.

Standard Method of Test for Characterization of the Air-void System of Freshly Mixed Concrete by the Sequential Pressure Method

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ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (144 download)

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Book Synopsis Standard Method of Test for Characterization of the Air-void System of Freshly Mixed Concrete by the Sequential Pressure Method by :

Download or read book Standard Method of Test for Characterization of the Air-void System of Freshly Mixed Concrete by the Sequential Pressure Method written by and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This method covers determination of the air content and sequential air method (SAM) number of freshly mixed concrete from observation of the change in volume of concrete with a sequential change in test pressure. This method is intended for use with concretes and mortars made with aggregates for which the aggregate correction factor can be satisfactorily determined by the technique described in Section 7. It is not applicable to concretes made with light-weight aggregates, air-cooled blast-furnace slag, or other aggregates with high porosity. This test method is also not applicable to nonplastic fresh concrete such as is commonly used in the manufacture of pipe and concrete masonry units.

Enhanced Entrained Air Void System Characterization for Durable Highway Concrete

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Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (134 download)

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Book Synopsis Enhanced Entrained Air Void System Characterization for Durable Highway Concrete by : Anthony Torres

Download or read book Enhanced Entrained Air Void System Characterization for Durable Highway Concrete written by Anthony Torres and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The air void system in concrete provides a strong influence on the behavior of cementitious materials in both the fresh and hardened state, especially as it relates to freeze-thaw resistance and deicer scaling. The most common test procedure to characterize the air void system is ASTM C457 – Standard Test method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete, which involves microscopic determination of the air content, paste content, air-void size distribution, and spatial dispersion of a sawn concrete sample. This procedure is reliant on the user to make hundreds of critical decisions per sample, which requires significant time, and is potentially subject to human error. Additionally, ASTM C457 provides minimal guidance regarding the exact steps and equipment necessary to prepare a sample for evaluation. The outcome of this research not only provides specific information regarding sample preparation for hardened concrete air void analysis, it also develops an alternative characterization technique that drastically minimizes evaluation time, human error, and increases reliability of key hardened air void characterization parameters. Specific results show on average air void difference of 0.5% and 0.7% between the alternative method versus ASTM C457 Procedure A and B, respectively. The results also show a significant reduction of analysis time from approximately 2 – 4 hours per sample to 15 minutes per sample when using the alternative method.

11th PhD Symposium in Tokyo Japan

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Publisher : FIB - Féd. Int. du Béton
ISBN 13 : 4990914805
Total Pages : 920 pages
Book Rating : 4.9/5 (99 download)

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Book Synopsis 11th PhD Symposium in Tokyo Japan by : FIB – International Federation for Structural Concrete

Download or read book 11th PhD Symposium in Tokyo Japan written by FIB – International Federation for Structural Concrete and published by FIB - Féd. Int. du Béton. This book was released on 2016-08-01 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Automated Air-void System Characterization of Hardened Concrete

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Publisher :
ISBN 13 :
Total Pages : 404 pages
Book Rating : 4.:/5 (232 download)

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Book Synopsis Automated Air-void System Characterization of Hardened Concrete by : Karl W. Peterson

Download or read book Automated Air-void System Characterization of Hardened Concrete written by Karl W. Peterson and published by . This book was released on 2008 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Robust Test of the Flatbed Scanner for Air-Void Characterization in Hardened Concrete

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Publisher :
ISBN 13 :
Total Pages : 16 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Robust Test of the Flatbed Scanner for Air-Void Characterization in Hardened Concrete by : Karl W. Peterson

Download or read book Robust Test of the Flatbed Scanner for Air-Void Characterization in Hardened Concrete written by Karl W. Peterson and published by . This book was released on 2015 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the province of Ontario, Canada, the Ministry of Transportation administers a quality assurance testing program for all new concrete construction where air content and spacing factor are measured. Testing is performed by qualified operators in accordance with ASTM C457/C457M-12. In this study, 324 routine samples that had been tested by qualified operators were obtained and analyzed for air-void parameters by an alternative automated flatbed scanner method. A strong correlation was found between the manual and automated methods. This research explored the premise that summary statistics from a small set of training samples could be used to define a set of global threshold levels to measure air-void parameters from a much larger population. Two different methods for setting the global thresholds were tested: one based on arithmetic means, and another based on modal location parameters derived from type I extreme value distributions. The frequency of false-negative errors (failure to detect a defect) was used as a criterion to assess the different threshold methods. Automated test results derived using global thresholds based on arithmetic means minimized the occurrence of false-negative events.

Pervious Concrete Pavements

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ISBN 13 : 9780893122423
Total Pages : 28 pages
Book Rating : 4.1/5 (224 download)

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Book Synopsis Pervious Concrete Pavements by : Paul D. Tennis

Download or read book Pervious Concrete Pavements written by Paul D. Tennis and published by . This book was released on 2004 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Evaluation of Two Automated Methods for Air-Void Analysis of Hardened Concrete

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ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (125 download)

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Book Synopsis Evaluation of Two Automated Methods for Air-Void Analysis of Hardened Concrete by : A. M. Ramezanianpour

Download or read book Evaluation of Two Automated Methods for Air-Void Analysis of Hardened Concrete written by A. M. Ramezanianpour and published by . This book was released on 2010 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Air-void analysis of hardened concrete is typically performed according to ASTM C457-09 ["Standard Test Method for Microscopical Determination of Parameters of Air-Void System in Hardened Concrete," Annual Book of ASTM Standards, Vol. 4.2, ASTM International, West Conshohocken, PA], which can be tedious to perform and is operator subjective. Several alternative automated methods have been proposed, two of which are the Rapid Air 457 and the scanner method developed at Michigan Technological University. In each of these methods, images are collected from contrast enhanced surfaces of polished concrete, and image analysis is performed to calculate air-void system parameters. In this research, 22 concrete samples were examined using these two methods, the air-void system parameters were compared to those obtained from the ASTM C457 standard, and the precision of the results was compared to the recommendations of ASTM standard. It was concluded that the total air content and the spacing factor of the air voids measured by Rapid Air 457 and the scanner method were comparable to the air content and the spacing factor measured according to the standard manual method. Considering the fact that the automated image systems could detect air voids smaller in diameter than those typically seen by an operator, it was found that if these small air voids are counted, calculated spacing factors are smaller than those calculated by the manual method. If small diameter air voids are removed from the analysis, then spacing factors agree fairly well with those calculated by ASTM C457 from stereo-optical microscopy.

Freeze-Thaw Durability of Concrete

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Publisher : CRC Press
ISBN 13 : 1482271559
Total Pages : 285 pages
Book Rating : 4.4/5 (822 download)

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Book Synopsis Freeze-Thaw Durability of Concrete by : J. Marchand

Download or read book Freeze-Thaw Durability of Concrete written by J. Marchand and published by CRC Press. This book was released on 1996-12-19 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Concrete durability in climates where freezing and thawing occurs is a continuing problem. It is particularly acute for highway and bridge structures, where de-icing salts are used to combat the effects of frost, snow and ice. These salts can cause damage to concrete and accelerate corrosion of reinforcements. This book presents the latest internat

Report on Pervious Concrete

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Publisher :
ISBN 13 : 9780870313646
Total Pages : 38 pages
Book Rating : 4.3/5 (136 download)

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Book Synopsis Report on Pervious Concrete by : ACI Committee 522

Download or read book Report on Pervious Concrete written by ACI Committee 522 and published by . This book was released on 2010 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This report provides technical information on pervious concrete's application, design methods, materials, properties, mixture proportioning, construction methods, testing, and inspection. The term 'pervious concrete' typically describes a near-zero-slump, open-graded material consisting of portland cement, coarse aggregate, little or no fine aggregate, admixtures, and water." [p. 1]

Materials Science of Concrete

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Publisher : Wiley-American Ceramic Society
ISBN 13 :
Total Pages : 392 pages
Book Rating : 4.3/5 (91 download)

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Book Synopsis Materials Science of Concrete by : Jacques Marchand

Download or read book Materials Science of Concrete written by Jacques Marchand and published by Wiley-American Ceramic Society. This book was released on 1999 with total page 392 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 18 papers grapple with new problems and old ones that remain unresolved concerning sulfate attack on concrete, not considered one of the most prevalent mechanisms of concrete deterioration, but one that has received much attention lately because of costly litigation against manufacturers, developers, and others. The topics include the role of ettringite in external sulfate attack, microstructural alterations in permeable concrete, assessing damage and predicting service life of venerable concrete, a marine environment, and the adequacy of standards. Annotation copyrighted by Book News, Inc., Portland, OR

Design and Control of Concrete Mixtures

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ISBN 13 :
Total Pages : 224 pages
Book Rating : 4.X/5 (6 download)

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Book Synopsis Design and Control of Concrete Mixtures by : Steven H. Kosmatka

Download or read book Design and Control of Concrete Mixtures written by Steven H. Kosmatka and published by . This book was released on 1988 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Portland Cement Association reference, dealing with fundamentals, cold weather concreting, curing, admixtures, aggregates, mixing, and much more.

Handbook of Environmental Engineering

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Publisher : John Wiley & Sons
ISBN 13 : 1118712943
Total Pages : 768 pages
Book Rating : 4.1/5 (187 download)

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Book Synopsis Handbook of Environmental Engineering by : Myer Kutz

Download or read book Handbook of Environmental Engineering written by Myer Kutz and published by John Wiley & Sons. This book was released on 2018-10-16 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive guide for both fundamentals and real-world applications of environmental engineering Written by noted experts, Handbook of Environmental Engineering offers a comprehensive guide to environmental engineers who desire to contribute to mitigating problems, such as flooding, caused by extreme weather events, protecting populations in coastal areas threatened by rising sea levels, reducing illnesses caused by polluted air, soil, and water from improperly regulated industrial and transportation activities, promoting the safety of the food supply. Contributors not only cover such timely environmental topics related to soils, water, and air, minimizing pollution created by industrial plants and processes, and managing wastewater, hazardous, solid, and other industrial wastes, but also treat such vital topics as porous pavement design, aerosol measurements, noise pollution control, and industrial waste auditing. This important handbook: Enables environmental engineers to treat problems in systematic ways Discusses climate issues in ways useful for environmental engineers Covers up-to-date measurement techniques important in environmental engineering Reviews current developments in environmental law for environmental engineers Includes information on water quality and wastewater engineering Informs environmental engineers about methods of dealing with industrial and municipal waste, including hazardous waste Designed for use by practitioners, students, and researchers, Handbook of Environmental Engineering contains the most recent information to enable a clear understanding of major environmental issues.

Integrated Materials and Construction Practices for Concrete Pavement

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Publisher :
ISBN 13 : 9780965231091
Total Pages : 326 pages
Book Rating : 4.2/5 (31 download)

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Book Synopsis Integrated Materials and Construction Practices for Concrete Pavement by :

Download or read book Integrated Materials and Construction Practices for Concrete Pavement written by and published by . This book was released on 2006 with total page 326 pages. Available in PDF, EPUB and Kindle. Book excerpt: Manual of integrated material and construction practices for concrete pavements.