Freeze Thaw Durability Of Concretes With And Without Class C Fly Ash

Author : Chengsheng Ouyang,John Lane
Publisher : Unknown
Page : 70 pages
File Size : 40,7 Mb
Release : 1997
Category : Concrete
ISBN : UCBK:C101263067

Get Book

Freeze-thaw Durability of Concretes with and Without Class C Fly Ash by Chengsheng Ouyang,John Lane Pdf

The freeze-thaw resistance of concretes was studied. Nine concrete mixes, made with five cements and cement-Class C fly ash combinations, were exposed to freeze-thaw cycling following 110 to 222 days of moist curing. Prior to the freeze-thaw cycling, the specimens were examined by a low-vacuum scanning electron microscope (SEN) for their microstructure. The influcence of a wet/dry treatment was also studied. Infilling of ettringite in entrained air voids was observed in the concretes tested. The extent of the infilling depends on the period of moist curing as well as the wet/dry treatment. The concretes with 15% Class C fly ash replacement show more infilling in their air voids. It was found that the influence of the infilling on the freeze-thaw durability relates to the air spacing factor. The greater the spacing factor, the more expansion under the freeze-thaw cycling. The infilling seems to decrease effective air content and to increase effective spacing factor. The infilling also implies that the filled air voids are water-accessible. These might lead to concrete more vulnerable to the freeze-thaw attack. By combining the above results with field observations, one may conclude that the freeze-thaw damage is a factor related to premature deterioration of PCC pavements in Iowa.

Author : Steven. M. Cramer,Richard A. Walls
Publisher : Unknown
Page : 110 pages
File Size : 45,8 Mb
Release : 2001
Category : Frost resistant concrete
ISBN : UCBK:C101262461

Get Book

Strategies for Enhancing the Freeze-thaw Durability of Portland Cement Concrete Pavements by Steven. M. Cramer,Richard A. Walls Pdf

Author : J. Marchand,M. Pigeon,M.J. Setzer
Publisher : CRC Press
Page : 323 pages
File Size : 48,5 Mb
Release : 2004-03-01
Category : Architecture
ISBN : 9780203627099

Get Book

Freeze-Thaw Durability of Concrete by J. Marchand,M. Pigeon,M.J. Setzer Pdf

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 international research on this area, with contributions from North America and Europe which were presented at an international RILEM workshop.

Author : Ken Isenberger
Publisher : Unknown
Page : 42 pages
File Size : 40,8 Mb
Release : 1981
Category : Fly ash
ISBN : NWU:35556021526447

Get Book

Fly Ash Concrete by Ken Isenberger Pdf

Effect of fly ash class, source and amount on the compressive strength and freeze-thaw durability of fly ash concrete.

Author : Rafat Siddique
Publisher : Springer Science & Business Media
Page : 416 pages
File Size : 43,9 Mb
Release : 2007-11-13
Category : Technology & Engineering
ISBN : 9783540742944

Get Book

Waste Materials and By-Products in Concrete by Rafat Siddique Pdf

The amount and variety of waste that humanity dumps in landfill sites is nothing short of a scandal, believes Rafat Siddique, of Deemed University in Patiala, India. Instead, we ought to be building new homes out of it! Siddique shows in this important book that many non-hazardous waste materials and by-products which are landfilled, can in fact be used in making concrete and similar construction materials.

Author : R C Joshi,R P Lohita
Publisher : CRC Press
Page : 290 pages
File Size : 41,6 Mb
Release : 1997-11-13
Category : Technology & Engineering
ISBN : 9056995804

Get Book

Fly Ash in Concrete by R C Joshi,R P Lohita Pdf

Since it was first recognized as a mineral admixture for concrete in the 1930's, fly ash has been the subject of worldwide study as researchers work to maximize its economical and environmental benefits. In recent years, investigations have focused on the physical, chemical and mineralogical characteristics of fly ash and their specific correlation to the performance of concrete. This book collects the latest results from these various studies and offers a complete review of the advantages of fly ash as an admixture in concrete, including strength development and improved chemical resistance and durability. A review of the current international standards on fly ash usage is provided, in addition to an extensive reference list and a complete survey of various other fly ash products, such as bricks, mineral wool and gypsum wall boards, as well as the use of fly ash in waste management.

Author : K. Wesche
Publisher : CRC Press
Page : 298 pages
File Size : 50,9 Mb
Release : 2004-03-01
Category : Architecture
ISBN : 9780203626412

Get Book

Fly Ash in Concrete by K. Wesche Pdf

This book is a state-of-the-art report which documents current knowledge on the properties of fly ash in concrete and the use of fly ash in construction. It includes RILEM Recommendations on fly ash in concrete and a comprehensive bibliography including over 800 references.

Author : Rafat Siddique,Mohammad Iqbal Khan
Publisher : Springer Science & Business Media
Page : 288 pages
File Size : 51,5 Mb
Release : 2011-03-28
Category : Technology & Engineering
ISBN : 9783642178665

Get Book

Supplementary Cementing Materials by Rafat Siddique,Mohammad Iqbal Khan Pdf

This book is an attempt to consolidate the published research related to the use of Supplementary Cementing Materials in cement and concrete. It comprises of five chapters. Each chapter is devoted to a particular supplementing cementing material. It is based on the literature/research findings published in journals/conference proceeding, etc. Topics covered in the book are; coal fly ash, silica fume (SF), granulated blast furnace slag (GGBS), metakaolin (MK), and rice husk ash (RHA). Each chapter contains introduction, properties of the waste material/by-product, its potential usage, and its effect on the properties of fresh and hardened concrete and other cement based materials.

Author : Kejin Wang
Publisher : Unknown
Page : 52 pages
File Size : 45,9 Mb
Release : 2009
Category : Concrete
ISBN : UCBK:C100918072

Get Book

Investigation Into Freezing-thawing Durability of Low Permeability Concrete with and Without Air Entraining Agent by Kejin Wang Pdf

The aim of the present study is to investigate the effect of low-permeability concrete, made with reduced water-to-binder ratios (w/b) and/or supplementary cementitious materials (SCMs), on the need for air entrainment to achieve freezing-thawing (F-T) durability. In the present study, concrete mixes were made with different types of cement (Type I and IP), with or without fly ash replacement (15%), with different water-to-binder ratios (w/b=0.25, 0.35, 0.45 and 0.55), and with or without air entraining agent (AEA). All concrete mixtures were controlled to have a similar slump by using different dosages of superplasticizer. The rapid chloride permeability and F-T durability of the concrete samples were determined according to ASTM C1202 and ASTM C666A, respectively. The air void structure of the concrete was studied using the Air Void Analyzer, Rapid Air, and porosity tests (ASTM C642). In addition, the general concrete properties, such as slump, air content, unit weight, and 28-day compressive strength, were evaluated. The results indicate that all concrete mixes with proper air entrainment (ASTM C23 air content greater than or equal to 6%) showed good F-T resistance (durability factor greater than or equal to 86%). All concrete mixes without AEA showed poor F-T resistance (durability factor less than 40%), except for one mix that had very low permeability and high strength. This was the concrete made with Type IP cement and with a w/b of 0.25, which had a permeability of 520 coulombs and a compressive strength of 12,760 psi (88 MPa). There were clear relationships between the F-T durability and hardened concrete properties of non-air entrained concrete. However, such relationships did not exist in concrete with AEA. For concrete with AEA, good F-T durability was associated with an air void spacing factor less than or equal to 0.28 mm (by AVA) or less than or equal to 0.22 mm (by RapidAir).

Author : Anonim
Publisher : Unknown
Page : 396 pages
File Size : 40,8 Mb
Release : 1987
Category : Cement
ISBN : STANFORD:36105013129551

Get Book

Concrete Abstracts by Anonim Pdf

Author : Anonim
Publisher : Unknown
Page : 29 pages
File Size : 41,5 Mb
Release : 1989
Category : Concrete
ISBN : OCLC:18579573

Get Book

Use of Fly Ash in Concrete by Anonim Pdf

Author : Sidney M Levy
Publisher : Butterworth-Heinemann
Page : 700 pages
File Size : 42,6 Mb
Release : 2011-09-19
Category : Mathematics
ISBN : 9780123822444

Get Book

Construction Calculations Manual by Sidney M Levy Pdf

Construction Calculations is a manual that provides end users with a comprehensive guide for many of the formulas, mathematical vectors and conversion factors that are commonly encountered during the design and construction stages of a construction project. It offers readers detailed calculations, applications and examples needed in site work, cost estimation, piping and pipefitting, and project management. The book also serves as a refresher course for some of the formulas and concepts of geometry and trigonometry. The book is divided into sections that present the common components of construction. The first section of the books starts with a refresher discussion of unit and systems measurement; its origin and evolution; the standards of length, mass and capacity; terminology and tables; and notes of metric, U.S, and British units of measurements. The following concepts are presented and discussed throughout the book: Conversion tables and formulas, including the Metric Conversion Law and conversion factors for builders and design professionals Calculations and formulas of geometry, trigonometry and physics in construction Rudiments of excavation, classification, use of material, measurement and payment Soil classification and morphology, including its physicochemical properties Formulas and calculations needed for soil tests and evaluations and for the design of retaining structures Calculations relating to concrete and masonry Calculations of the size/weight of structural steel and other metals Mechanical properties of wood and processing of wood products Calculations relating to sound and thermal transmission Interior finishes, plumbing and HVAC calculations Electrical formulas and calculations Construction managers and engineers, architects, contractors, and beginners in engineering, architecture, and construction will find this practical guide useful for managing all aspects of construction. Work in and convert between building dimensions, including metric Built-in right-angle solutions Areas, volumes, square-ups Complete stair layouts Roof, rafter and framing solutions Circle: arcs, circumference, segments

Author : R Auberg,M.J. Setzer
Publisher : CRC Press
Page : 400 pages
File Size : 41,7 Mb
Release : 2004-03-01
Category : Architecture
ISBN : 9780203627327

Get Book

Frost Resistance of Concrete by R Auberg,M.J. Setzer Pdf

This book forms the proceedings of the international workshop to be held in Essen, Germany. This workshop summarises the conclusion of the technical committee's investigations into the resistance of concrete to freeze-thaw attack, specific in this to resistance with or without de-icing chemicals. It presents the RILEM recommendations on testing the freeze-thaw and de-icing salt resistance of concrete.

Author : Paul Zia
Publisher : Unknown
Page : 262 pages
File Size : 44,6 Mb
Release : 1991
Category : Fiber-reinforced concrete
ISBN : UCBK:C101266148

Get Book

High Performance Concretes by Paul Zia Pdf

This state-of-the-art report summarizes the results of an extensive search and review of available literature on the mechanical properties of concrete, with particular reference to high performance concrete for highway applications. Included in the review and discussion are the behavior of plastic concrete as well as the strength and deformation characteristics of hardened concrete. Both short-term and long-term effects are considered. Based on the review of the available information, research needs are identified. It is concluded that much research is needed to develop data on the strength and durability properties of concrete which develops high strength, particularly very early strength.

Author : Anonim
Publisher : Unknown
Page : 1224 pages
File Size : 43,5 Mb
Release : 1988
Category : Power resources
ISBN : CUB:U183019900233

Get Book

Energy Research Abstracts by Anonim Pdf