SOME PROPERTIES OF UNDERWATER CAST CONCRETE

The paper presents the results of lab tests on the washout degree of concrete mixes prepared for underwater concreting by the Contractor method. The effect of various factors on the washout degree is shown such as concrete composition, presence of different admixtures (including antiwashout ones), type of water environment (fresh or sea water), etc. Some properties of underwater cast concrete, obtained from concrete mixes, which have shown the lowest susceptibility to washout, have also been studied. Original lab methods were used for this purpose. The effect of underwater casting on different concrete properties has been examined. The following tests have been carried out: (1) washout tests on concrete mixes and specifying some factors influencing on the process; (2) comparative strength tests on underwater cast concrete (fresh or sea water) and concrete cast in air; (3) the change in the hardness and strength, respectively, of the underwater cast concrete in the surface layer and in depth is examined; (4) the porous structure of the underwater cast concrete in the surface layer and its change in depth is studied; and (5) the change in the pH value of the underwater cast concrete in the surface layer and its change in depth is determined, with the view to identifying corrosion processes in the concrete and protection of the available reinforcement from corrosive attack. For the covering abstract see ITRD E116313.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0727731785
• Corporate Authors:

  Thomas Telford Limited

  London,   United Kingdom 
• Authors:
  • ROSTOVSKY, I A
  • DARAKCHIEV, B D
• Publication Date: 2002

Language

• English

Media Info

• Features: References;
• Pagination: p. 297-310
• Serial:
  • CONCRETE FOR EXTREME CONDITIONS. PROCEEDINGS OF THE INTERNATIONAL CONFERENCE HELD AT THE UNIVERSITY OF DUNDEE, SCOTLAND, UK ON 9-11 SEPTEMBER 2002
  • Publisher: Thomas Telford Limited

Subject/Index Terms

• TRT Terms: Admixtures; Cast in place concrete; Concrete; Conferences; Construction; Mix design; Properties of materials; Seas; Strength of materials; Underwater construction; Underwater structures
• ITRD Terms: 4736: Admixture; 4781: Cast in situ concrete; 4755: Concrete; 8525: Conference; 3655: Construction; 4714: Mix design; 5925: Properties; 4368: Sea; 5544: Strength (mater); 3626: Underwater
• Subject Areas: Bridges and other structures; Construction; Materials;

Filing Info

• Accession Number: 00939159
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 0-7277-3178-5
• Files: ITRD
• Created Date: Mar 7 2003 12:00AM