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Author: National Research Council (U.S.). Committee on Chemical Additions and Admixtures for Concrete
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 17
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Book Description
A review is presented of the use of accelerators in concrete when decreased setting time or increased rate of strength development is desired. An accelerating admixture is defined as a material that is used for the purpose of accelerating the setting and strength development of concrete. These admixtures are useful, particularly in cold weather, for modifying the properties of portland cement to: (1) expedite the start of finishing operations and, when necessary, the application of insulation, (2) reduce the period of time required for proper curing, especially in the late fall paving where early application of de-icing salts may be expected, and (3) permit earlier loading or opening of pavements and structures to traffic.
Author: National Research Council (U.S.). Committee on Chemical Additions and Admixtures for Concrete
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 17
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Book Description
A review is presented of the use of accelerators in concrete when decreased setting time or increased rate of strength development is desired. An accelerating admixture is defined as a material that is used for the purpose of accelerating the setting and strength development of concrete. These admixtures are useful, particularly in cold weather, for modifying the properties of portland cement to: (1) expedite the start of finishing operations and, when necessary, the application of insulation, (2) reduce the period of time required for proper curing, especially in the late fall paving where early application of de-icing salts may be expected, and (3) permit earlier loading or opening of pavements and structures to traffic.
Author: Thomas John Van Dam
Publisher: Transportation Research Board
ISBN: 0309088356
Category : Technology & Engineering
Languages : en
Pages : 38
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Book Description
Author: National Research Council (U.S.). Highway Research Board. Committee on Chemical Additions and Admixtures for Concrete
Publisher:
ISBN:
Category : Cement
Languages : en
Pages : 60
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Book Description
An admixture is any material other than water, aggregates, and hydraulic cement that is used as an ingredient of a concrete or mortar mixture and added to the batch immediately before or during mixing. 4 types of admixtures are discussed: (1) accelerators, the most common of which is calcium chloride; (2) air-entraining, to protect the concrete against the damage it may suffer if the paste becomes saturated with water and then freezes; (3) retarders and water reducers, which extend setting time 30 to 50 percent to compensate for placement temperatures, to avoid cold joints, or to avoid undesirable effects of displacements and deflections; and (4) pozzolans, which react with hydroxides to form compounds with cementitious properties, and usually produce a lower cost concrete.
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 1034
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Book Description
Author: National Research Council (U.S.). Highway Research Board
Publisher:
ISBN:
Category : Highway engineering
Languages : en
Pages : 50
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Book Description
Author: United States. Congress. Senate. Committee on Public Works
Publisher:
ISBN:
Category : Materials
Languages : en
Pages : 136
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Book Description
Author: D. Raymond Sharp
Publisher: Elsevier
ISBN: 1483159329
Category : Technology & Engineering
Languages : en
Pages : 172
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Book Description
International Series of Monographs in Civil Engineering, Volume 4: Concrete in Highway Engineering focuses on the design and construction of highways. The book first offers information on concrete as a material. Cement, aggregates, water, concrete mixes, and curing concrete are then explained. The text examines the design of pavements. Principles of design, traffic loading, design of flexible and concrete pavements, and types of pavement are underscored. The text looks at subgrade soils, sub-bases, and drainage. Topics such as moisture control and drainage; control of surface and subsoil water; and layouts for subsoil drainage and for surface water drainage are discussed. The text also examines the composition of concrete roads, prestressed concrete roads, and maintenance and repair techniques. The book then discusses the appearance and surface characteristics of concrete and construction in extreme weather conditions. The selection is a reliable reference for readers wanting to know about the design and construction of highways.
Author: Don Johannsen
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 9
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Book Description
Author: David S. Macadam
Publisher:
ISBN:
Category : Concrete
Languages : en
Pages : 122
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 694
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Book Description
