The Analysis of Some Water-reducing Concrete Admixtures PDF Download

Author: Neil Brennan Milestone
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 16

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Author: V.H. Dodson
Publisher: Springer Science & Business Media
ISBN: 1475748434
Category : Technology & Engineering
Languages : en
Pages : 218

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Author: Zongjin Li
Publisher: John Wiley & Sons
ISBN: 0470902434
Category : Technology & Engineering
Languages : en
Pages : 698

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Book Description
Over the past two decades concrete has enjoyed a renewed level of research and testing, resulting in the development of many new types of concrete. Through the use of various additives, production techniques and chemical processes, there is now a great degree of control over the properties of specific concretes for a wide range of applications. New theories, models and testing techniques have also been developed to push the envelope of concrete as a building material. There is no current textbook which brings all of these advancements together in a single volume. This book aims to bridge the gap between the traditional concrete technologies and the emerging state-of-the-art technologies which are gaining wider use.

Author: U.S. Army Engineer Waterways Experiment Station
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 58

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Author: HC. Fisciler
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 17

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Concrete as an engineering material is judged, in the last analysis, by its properties in the hardened state. It is in this state that the effects of imposed load and environment are controlled by the properties of the concrete.

Author: Pierre-Claude Aïtcin
Publisher: Woodhead Publishing
ISBN: 0081006969
Category : Technology & Engineering
Languages : en
Pages : 668

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Book Description
Science and Technology of Concrete Admixtures presents admixtures from both a theoretical and practical point-of-view. The authors emphasize key concepts that can be used to better understand the working mechanisms of these products by presenting a concise overview on the fundamental behavior of Portland cement and hydraulic binders as well as their chemical admixtures, also discussing recent effects in concrete in terms of rheology, mechanics, durability, and sustainability, but never forgetting the fundamental role played by the water/binder ratio and proper curing in concrete technology. Part One presents basic knowledge on Portland cement and concrete, while Part Two deals with the chemical and physical background needed to better understand what admixtures are chemically, and through which mechanism they modify the properties of the fresh and hardened concrete. Subsequent sections present discussions on admixtures technology and two particular types of concrete, self-consolidating and ultra-high strength concretes, with final remarks on their future. - Combines the knowledge of two leading authors to present both the scientific and technology of admixtures - Explains what admixtures are from a chemical point-of-view and illustrates by which mechanisms they modify the properties of fresh and hardened concrete - Presents a fundamental, practical, and innovative reference book on the topic - Contains three detailed appendices that can be used to learn how to use admixtures more efficiently

Author:
Publisher: ASTM International
ISBN:
Category :
Languages : en
Pages : 254

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Author: Sandra Senft
Publisher: CRC Press
ISBN: 0203017242
Category : Architecture
Languages : en
Pages : 456

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Book Description
Chemical admixtures are used in concrete mixtures to produce particular engineering properties such as rapid hardening, water-proofing or resistance to cold. Chemical Admixtures for Concrete surveys recent developments in admixture technology, explaining the mechanisms by which admixtures produce their effects, the various types of admixtures avail

Author: M. R. Hansen
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 64

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Book Description
This project investigated compatibility problems involving two concrete admixtures from W.R. Grace Products and Dacotah portland cement. The problems experienced by the South Dakota Department of Transportation (SDDOT) were described as rapid slump loss, premature stiffening, and low compressive strengths. The materials investigated in this report are commonly used by the SDDOT in concrete construction projects. The research objectives were met by performing mortar and concrete flow table tests to verify compatibility between Dacotah cement and a high-range water-reducing admixture (HRWRA) and a retarder. The flow table tests were also used to determine an optimum time of addition for the admixtures. A five factorial statistical design to create thirty-three concrete mix designs was used in an effort to reproduce a compatibility problem. Finally, a field demonstration project was conducted to verify compatibility between the cement and admixtures under field conditions. Maximum dosages of each admixture were used in an attempt to create a compatibility problem. The mortar flow table test of Type V cement and HRWRA exhibited an optimum time of addition of the admixture to be at four minutes. The retarder showed no effect on the flow table results. Concrete mortar flow table results showed an improved performance with delayed addition of both the HRWRA and retarder. Analysis of the 33 concrete mixtures showed no general incompatibility between the cement and admixtures when the manufacturers' recommended mixing procedures were followed. The field demonstration displayed incompatibility between the cement and both admixtures; however, both admixtures were used at the maximum recommended dosages.

Author: Symposium on Effect of Water Reducing Admixtures and Set Retarding Admixtures on Properties of Concrete. 1959, San Francisco, Calif..
Publisher:
ISBN:
Category :
Languages : en
Pages : 246

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