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The Effect Of Steam Curing On High Early Strength Portland Cement Containing Carbonate Addition
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Book Synopsis The Effect of Steam Curing on High-Early Strength Portland Cement Containing Carbonate Addition by : C. Bédard
Download or read book The Effect of Steam Curing on High-Early Strength Portland Cement Containing Carbonate Addition written by C. Bédard and published by . This book was released on 1990 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 1981 the Canadian Standards Association (CSA) Committee A5 on Hydraulic Cements approved carbonate addition to normal portland cement Type 10 to a maximum of 5%. The decision was based on a considerable amount of data indicating no adverse effects on the properties of concrete and even improvements at optimum level of carbonate addition. The CSA Committee is now considering a proposal for extending carbonate addition to high-early strength portland cement Type 30 that has essentially the same chemical composition as Type 10 cement. Since Type 30 cement is used primarily in precast and prestressed concrete operations, a project has been initiated at the Research and Technical Center of Lafarge Canada Inc. to study the effect of steam curing conditions on the properties of concrete made with Type 30 cement containing carbonate addition. The main parameters will be the tricalcium aluminate (C3A) content of the cement, the presence of carbonate addition, and the curing temperature. The properties investigated will be compressive strength, freezing and thawing resistance ASTM Test for Resistance of Concrete to Rapid Freezing and Thawing (C 666, Procedure A), and volume change ASTM Test for Length Change of Hardened Hydraulic Cement Mortar and Concrete (C 157).
Book Synopsis Carbonate Additions to Cement by : Paul Klieger
Download or read book Carbonate Additions to Cement written by Paul Klieger and published by ASTM International. This book was released on 1990 with total page 87 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Effect of High-pressure Steam on the Crushing Strength of Portland Cement Mortar and Concrete by : Rudolph James Wig
Download or read book The Effect of High-pressure Steam on the Crushing Strength of Portland Cement Mortar and Concrete written by Rudolph James Wig and published by . This book was released on 1912 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Carbonate Aggregate Reactions and Steam Curing of Concrete by : National Research Council (U.S.). Highway Research Board
Download or read book Carbonate Aggregate Reactions and Steam Curing of Concrete written by National Research Council (U.S.). Highway Research Board and published by . This book was released on 1962 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: Paper 1: Development of high early strength is desirable to the manufacturers of precast and prestressed concrete units, which often require expensive forms or stress beds. Steam curing accelerates the gain in strength at early ages, but the uncontrolled use of steam may seriously affect the growth in strength at later ages. Paper 2: The discovery that concrete aggregates were not inert but could participate in chemical reactions with certain cement compounds stimulated an international research effort that has resulted in the recognition of several distinct mechanisms by which these reactions may reduce the durability of concrete. Recently, attention has been drawn to a reaction involving the cement alkalies and a type of argillaceous dolomitic limestone.
Book Synopsis Value of the High-pressure Steam Test of Portland Cements by : Rudolph James Wig
Download or read book Value of the High-pressure Steam Test of Portland Cements written by Rudolph James Wig and published by . This book was released on 1915 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Carbonate Additions on Heat of Hydration and Sulfate Resistance of Portland Cements by : RD. Hooton
Download or read book Effects of Carbonate Additions on Heat of Hydration and Sulfate Resistance of Portland Cements written by RD. Hooton and published by . This book was released on 1990 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Canadian Standard CSA CAN3-A5.M83 allows the addition of up to 5% carbonate additions for Type 10, normal Portland cement, and this allowance has recently been extended to Type 30, high-early strength cement. The possibility of extending the carbonate additions to the other cement types, including those for sulfate resistance and moderate heat of hydration, has been discussed by the A5 Committee, and some concrete test data have been presented. However, the initial results did not include testing for the effects on sulfate resisting or heat of hydration properties. Therefore, this study was initiated.
Book Synopsis Calcined Clays for Sustainable Concrete by : Karen Scrivener
Download or read book Calcined Clays for Sustainable Concrete written by Karen Scrivener and published by Springer. This book was released on 2015-06-07 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume focuses on research and practical issues linked to Calcined Clays for Sustainable Concrete. The main subjects are geology of clays, hydration and performance of blended system with calcined clays, alkali activated binders, economic and environmental impacts of the use of calcined clays in cement based materials. Topics addressed in this book include the influence of processing on reactivity of calcined clays, influence of clay mineralogy on reactivity, geology of clay deposits, Portland-calcined clay systems, hydration, durability, performance, Portland-calcined clay-limestone systems, hydration, durability, performance, calcined clay-alkali systems, life cycle analysis, economics and environmental impact of use of calcined clays in cement and concrete and field applications. This book compiles the different contributions of the 1st International Conference on Calcined Clays for Sustainable Concrete, which took place in Lausanne, Switzerland, June, 23-25, 2015.The papers present the latest research in their field. It contains nearly 80 papers and abstracts. Overall, this work gives a broad view of research on calcined clays in the field of construction and will stimulate further research into calcined clays for sustainable concrete.
Book Synopsis Concrete Admixtures Handbook, 2nd Ed. by : V.S. Ramachandran
Download or read book Concrete Admixtures Handbook, 2nd Ed. written by V.S. Ramachandran and published by William Andrew. This book was released on 1996-12-31 with total page 1183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Since the publication of the first edition ten years ago, significant developments have occurred in the use of admixtures in concrete. Eight new chapters and a full update of the preceding ten chapters bring this book up to date; reflecting the relative advances made in the science and technology of different groups of admixtures. The increased role and development of admixtures in concrete technology is evidenced by a number of conferences, publications, and novel admixtures available in the market place. These developments in the field caused the modification of many chapters in the first edition in order to reflect the advances. Although individual chapters refer to standards and specifications of admixtures, those only interested in the standards or techniques used in investigating admixtures will find the second chapter (Research Technologies, Standards, and Specifications) useful. Admixtures are not as inert as may be presumed. They may chemically interact with the constituents of concrete and affect the properties of the fresh and hardened concrete and its durability. The third chapter deals with these aspects. It was important to devote a chapter to recent attempts in developing new admixtures.
Book Synopsis The Effect of Secondary Ettringite Formation on the Durability of Concrete by : Robert L. Day
Download or read book The Effect of Secondary Ettringite Formation on the Durability of Concrete written by Robert L. Day and published by Portland Cement Association. This book was released on 1992 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report comprises a review and analysis of the available literature pertaining to the causes, effects and prevention of secondary (delayed) ettringite in concrete . Over 300 publications have been examined . Case studies of damage in concrete possibly caused by secondary ettringite formation are examined first. Fundamental research on secondary ettringite formation, its chemistry, and deposition mechanisms is then reviewed. Key investigations on the topic are analyzed in detail. Next, the potential importance of (a) method of heat-curing and (b) the chemistry of cement is outlined. In the final chapter, a rapid test for evaluation of potential secondary ettringite susceptibility (the "Duggan" test) is evaluated. The analysis indicates that there appears to be a potential for a secondary ettringite formation problem in North America; it is highly probable that secondary ettringite formation can lead to significant deterioration of heat-treated concrete. However, it is unlikely that secondary ettringite formation is, or will be, the sole mechanism responsible for premature deterioration. The critical factors that determine extent of damage due to secondary ettringite formation are (a) duration of delay period before heating the concrete; (b) severity of the heating and/or cooling regime ; and (c) the SO3/A1203 ratio of the cement. There is no evidence that nonheat-treated concrete is susceptible to this phenomenon. Further research and improvements to the Duggan test may result in the development of a useful standard test method to assess the long-term dimensional stability and durability of concrete.
Book Synopsis The Use of Limestone in Portland Cement by : Rachel Jean Detwiler
Download or read book The Use of Limestone in Portland Cement written by Rachel Jean Detwiler and published by . This book was released on 1996 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Cal as an Accelerator of the Hardening of Portland Cement Mixtures by : Roy Norton Young
Download or read book Effects of Cal as an Accelerator of the Hardening of Portland Cement Mixtures written by Roy Norton Young and published by . This book was released on 1920 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Steam Curing of Portland Cement Concrete at Atmospheric Pressure by : Richard R. Merritt
Download or read book Steam Curing of Portland Cement Concrete at Atmospheric Pressure written by Richard R. Merritt and published by . This book was released on 1962 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary reason for using steam in the curing of concrete is to produce a high early strength. This high early strength is very desirable to the manufacturers of precast and prestressed concrete units, which often require expensive forms or stress beds. They want to remove the forms and move the units to storage yards as soon as possible. The minimum time between casting and moving the units is usually governed by the strength of the concrete. Steam curing accelerates the gain in strength at early ages, but the uncontrolled use of steam may seriously affect the growth in strength at later ages. The research described in this report was prompted by the need to establish realistic controls and specifications for the steam curing of pretensioned, prestressed concrete bridge beams and concrete culvert pipe manufactured in central plants. The complete project encompasses a series of laboratory and field investigations conducted over a period of approximately three years.
Book Synopsis Development of Early Carbonation Curing to Replace Steam Curing for Precast Dry-mix Concrete by : Vahid Rostami
Download or read book Development of Early Carbonation Curing to Replace Steam Curing for Precast Dry-mix Concrete written by Vahid Rostami and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: "Early carbonation curing technology was developed to replace steam curing for precast dry-mix concrete production. To facilitate carbon dioxide diffusion in concrete within 24-h after casting, presetting is necessary. It was accomplished by a short steam curing or by a controlled air curing. Carbonation was carried out after presetting at a gas pressure of 0.15 MPa and in a period of two hours. The performance of carbonated concretes was characterized by their carbon uptake, strength gain, pH values, calcium hydroxide content, permeability, sorptivity, freeze-thaw damage resistance and sulphate and acid resistance. It was found that the early carbonation curing could produce concrete with comparable strength by steam curing and lead to reduced calcium hydroxide on surface while maintaining pH higher than the corrosion threshold at the core. Carbonated concretes also exhibited improved resistance to sulphate attack, water absorption, and ion penetration. The early carbonation curing also demonstrated CO2 sequestration potential as an added value to the process. The microstructure of the cement paste subject to early carbonation was studied to understand the mechanism of early carbonation of concrete. Calcium carbonates produced by the process were integrated in calcium-silicate-hydrate while maintaining its initial silicate structure. The wetting procedure applied in subsequent hydration was essential to produce more hydration products in the carbonated zone and increase strength and durability. Both ordinary Portland cement (OPC) and Portland limestone cement (PLC) were investigated for their carbonation behaviour. PLC was found to be more CO2 reactive. " --
Book Synopsis An Investigation of the Effect of Steam Curing Portland Cement Concrete by : Russell King Robinson
Download or read book An Investigation of the Effect of Steam Curing Portland Cement Concrete written by Russell King Robinson and published by . This book was released on 1917 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Method of Predicting the Twenty-eight Day Strength of Portland Cement Concrete by Early Tests and Special Methods of Curing by : Frank Elliot Nichol
Download or read book A Method of Predicting the Twenty-eight Day Strength of Portland Cement Concrete by Early Tests and Special Methods of Curing written by Frank Elliot Nichol and published by . This book was released on 1926 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ceramic Abstracts written by and published by . This book was released on 1992 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ninth International Congress on the Chemistry of Cement, New Delhi, India, 1992 by :
Download or read book Ninth International Congress on the Chemistry of Cement, New Delhi, India, 1992 written by and published by . This book was released on 1992 with total page 902 pages. Available in PDF, EPUB and Kindle. Book excerpt:
