Author: William O. TynesPublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 36
Book Description
Evaluation of Admixtures for Use in Concrete to be Placed Underwater
Author: William O. TynesPublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 36
Book Description
Evaluation of water reducing admixtures in portland cement concrete with high amounts of microfine aggregate
Author: Scott Ronald WitthoftPublisher:
ISBN:
Category :
Languages : en
Pages : 116
Book Description
Evaluating Air-entraining Admixtures for Highway Concrete
Author: Mohamad NagiPublisher: Transportation Research Board
ISBN: 0309098890
Category : Air-entrained concrete
Languages : en
Pages : 60
Book Description
"This report presents a recommended procedure for evaluating air-entraining admixtures used in highway concrete. The procedure involves the testing of non-air-entrained concrete and concrete containing the air-entraining admixture under simulated field conditions. Criteria are proposed for acceptance of admixtures for use in either highway pavements or structures. The recommended procedure and acceptance criteria will guide materials engineers in evaluating and selecting air-entraining admixtures that should contribute to appropriate freeze-thaw durability and thus to good performance and long service life. The content of the report will be of immediate interest to materials engineers, researchers, and others concerned with the design of concrete mixtures for use in highway pavements and structures."--taken from Foreword, page [v].
Application of Admixtures in Concrete
Author: A.M. PaillerePublisher: CRC Press
ISBN: 0203626397
Category : Architecture
Languages : en
Pages : 140
Book Description
This book provides a thorough review of the properties and use of the principal chemical admixtures for use in concrete. Concise and clearly presented, the book includes extensive references to key sources of information. The presentation of each admixture is in a standard format, which helps the reader to find relevant information easily.
Evaluation of the Effect on Set Time of Some Type A Water Reducing Chemical Admixtures
Author: Doran GlauzConcrete Admixtures Handbook
Author: V.S. RamachandranPublisher: William Andrew
ISBN: 0815516541
Category : Technology & Engineering
Languages : en
Pages : 1183
Book Description
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.
Evaluation of Concrete Mixtures for Use in Underwater Repairs
Author: Billy D. NeeleyPublisher:
ISBN:
Category : Concrete
Languages : en
Pages : 132
Book Description
Concrete Admixtures
Author: V.H. DodsonPublisher: Springer Science & Business Media
ISBN: 1475748434
Category : Technology & Engineering
Languages : en
Pages : 218
Book Description
Repair, Evaluation, Maintenance, and Rehabilitation Research Program: Evaluation of Concrete Mixtures for Use in Underwater Repairs
Author: Billy D. NeeleyPublisher:
ISBN:
Category :
Languages : en
Pages : 134
Book Description
Concrete mixtures were evaluated to determine which were most suited for placement underwater in thin lifts. The concretes were proportioned to have good workability, good abrasion erosion resistance, and good resistance to washing out of the cement paste. High-range water reducers (HRWR) were used to increase the workability and permit the use of low water cement ratios (W/C) to increase the resistance to abrasion erosion. Low W/C, silica fume, and antiwashout admixtures (AWA) were used to increase the resistance to washout. A washout test was used to determine the relative amount of cement paste lost when the concrete is exposed to a large volume of water. The two-point workability test was used to evaluate the relative workability properties of each mixture. The slump and air content were also measured for most of the mixtures. The test method for abrasion erosion resistance of concrete (underwater method) was used to determine the abrasion erosion resistance of each mixture. The results of these tests were used to determine the combination of materials necessary to produce concrete with the desired properties. Significant correlations that exist between the two-point measurements and washout measurements were examined. The effects that W/C, HRWR's, AWA's, fly ash, and silica fume have upon washout resistance and abrasion-erosion resistance were examined.
Technical Memodrandum
Author: Waterways Experiment Station (U.S.)Publisher:
ISBN:
Category :
Languages : en
Pages : 258
Book Description