DEVELOPMENTS IN THE APPLICATION OF HIGH-PERFORMANCE CONCRETES

Over the last few years, the compressive strength of some of the concrete, used has increased dramatically. In 1988, a 120 MPa concrete was delivered on site, while until relatively recently, MPa was considered indicative of high strength. The spectacular increase in compressive strength is directly related to a number recent technological developments, in particular the discovery of extraordinary dispersing action of superplasticizers with which flowing concretes can be made with about the same mixing water th actually required to hydrate all the cement particles or even les The reduction in water/cement ratio results in a hydrated cement with a microstructure so dense and strong that coarse aggregate c become the concrete's weakest constituent. Silica fume, a highly reactive pozzolan, considerably enhances the paste/aggregate inte and minimizes debonding when final failure occurs. Lastly, the u supplementary cementitious materials, such as fly ash and especia slag, helps solve slump loss problems which become critical at lo ratios. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • Aitcin, P-C
• Publication Date: 1995-2

Language

• English

Media Info

• Features: References;
• Pagination: p. 13-7
• Serial:
  • Construction and Building Materials
  • Volume: 9
  • Issue Number: 1
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Concrete; High performance concrete; High strength; Mix design; Plasticizers; Strength of materials
• ITRD Terms: 4755: Concrete; 5537: High strength; 4714: Mix design; 4725: Plasticizer; 5544: Strength (mater)
• Subject Areas: Design; Materials;

Filing Info

• Accession Number: 00680295
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD,
• Created Date: Jun 27 2001 12:00AM