DURABILITY OF CONCRETE. AGGREGATE-ALKALI REACTION

DURABILIDAD DE LOS HORMIGONES. REACCION ARIDO-ALCALIS

Aggregate-alkali reaction is a very specific aspect of the durability or chemical strength of concrete. The cases where reactive aggregates are found and deterioration of the concrete is observed because of the aggregate-alkali reaction are increasingly numerous. The subject comprises other aspects: manufacture of cement, process and equipment, local availability of acceptable aggregates, prevention of expansion and its economic implications. In each case, the author deals successively with the following: (1) alkalis in raw materials, in the technology of clinker manufacture, in cement, and in standards; (2) geological, petrographic and mineralogical characteristics of the rocks used for aggregates and the susceptibility of these rocks to alkalis; (3) chemical aspects of expansive reaction through the properties of the reactive elements, conditions required and external and internal determining factors of the concrete; (4) inhibition of expansion. The conclusion discusses the factors causing the aggregate-alkali reaction, the necessary conditions (accidental or coincidental) under which the reaction occurs, and methods of preventing it. (TRRL)

• Corporate Authors:

  Instituto Eduardo Torroja

  Costillares, Chamartin
  Madrid 33,   Spain 
• Authors:
  • Veronelli, D
• Publication Date: 1978-9

Language

• Spanish

Media Info

• Features: Figures; References;
• Pagination: 36 p.
• Serial:
  • Monografias
  • Issue Number: 352
  • Publisher: Instituto Eduardo Torroja

Subject/Index Terms

• TRT Terms: Aggregates; Alkali; Cement; Chemical reactions; Concrete; Durability; Expansion; Geology; Manufactures; Manufacturing; Specifications; Standards; Surveillance; Technology
• Old TRIS Terms: Alkalies; Expansion (Construction phenomena)
• ITRD Terms: 4577: Aggregate; 7353: Alkali; 4758: Cement; 4755: Concrete; 5910: Durability; 4053: Geology; 3647: Manufacture; 7156: Reaction (chem); 187: Specification (standard); 9101: Surveillance; 3855: Technology
• Subject Areas: Geotechnology; Highways; Materials; Planning and Forecasting; I32: Concrete; I72: Traffic and Transport Planning;

Filing Info

• Accession Number: 00309637
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Monograph
• Files: ITRD, TRIS
• Created Date: Oct 8 1980 12:00AM