Author:
Publisher: DIANE Publishing
ISBN: 142891384X
Category :
Languages : en
Pages : 44

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Book Description

Author: Charles J. Korhonen
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 52

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Book Description

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:
Publisher:
ISBN:
Category : Arctic regions
Languages : en
Pages : 52

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Book Description

Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher:
ISBN:
Category : Energy development
Languages : en
Pages : 1276

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Book Description

Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher:
ISBN:
Category : Energy development
Languages : en
Pages : 1288

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Author: United States. Congress. House. Committee on Public Works and Transportation. Subcommittee on Surface Transportation
Publisher:
ISBN:
Category : Federal aid to transportation
Languages : en
Pages : 982

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Author: United States. Congress. House. Committee on Appropriations. Subcommittee on Energy and Water Development
Publisher:
ISBN:
Category : Nature
Languages : en
Pages : 580

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Author: Cold Regions Research and Engineering Laboratory (U.S.)
Publisher:
ISBN:
Category : Antifreeze solutions
Languages : en
Pages : 52

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Book Description

Author:
Publisher: DIANE Publishing
ISBN: 1428913157
Category :
Languages : en
Pages : 52

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Book Description
The goal of this project was to develop a chemical admixture that would reduce the need for wintertime thermal protection of freshly placed concrete. Chemicals were investigated for their ability to promote strength gain in concrete cured below 0 deg C. The project was carried out in five phases. Phase 1 evaluated existing and new admixtures. Phase 2 measured the effect of promising chemicals on concrete properties. Phases 3 and 4 tested the practicality of using the new technology/admixture in the field. Phase 5 disseminated the findings through an Army conference and through the development of this report, in addition to normal W.R. Grace advertising channels. Laboratory strength tests established that two prototype admixtures were capable of protecting concrete down to -5 deg C. Results from other laboratory tests show that the chemicals pose no harm to the concrete or embedded ferrous metals. Concrete containing the prototype admixtures passes standard freeze-thaw tests, does not shrink unusually, does not contain harmful alkalis, and does not produce irregular hydration products. Field tests clearly demonstrated that working with these new admixtures requires no new skills. The concrete can be mixed at lower temperatures, saving energy. The admixtures are easily dosed into the mixing trucks, as is normal practice today, and concrete is finished in the usual manner. Estimates show that the two prototype admixtures can extend the construction season by as much as three months in the contiguous United States. The prototype has proved that low-temperature admixtures are possible. The industry partner sees the need to develop admixtures that will work to -10 deg C before going commercial with this technology.