THE INFLUENCE OF SO3 CONTENT ON THE BEHAVIOUR OF PORTLAND CEMENT MORTARS

L'INFLUENCE DE LA TENEUR EN SO3 SUR LE COMPORTEMENT DES MORTIERS DE CIMENT PORTLAND DER EINFLUB DES SO3 GEHALTS AUF DAS VERHALTEN VON PORTLANDZEMENTMORTELN

This review of the literature on the infleunce of gypsum content upon the early age behavior of cement pastes and mortars, shows that the SO3 content above which excessive expansions may occur is not related to C3A content but is related either to cement fineness, or, less probably to alkali content. These findings relate to portland cements obtained by methods relating to retardation, minimum shrinkage, maximum strength, and "no excess expansion". The findings relate to the SO3 content above which an expansion in excess of 100 and 200 micro-strains was observed to occur in a range of mortars stored under water from 24 h to 7 days. It is suggested that if more than one SO3 content limit is specified in the Cement Standards for ordinary and rapid hardening portland cements, then the limits should be based upon cement fineness only.

• Corporate Authors:

  Cement and Concrete Association

  Wexham Spring
  Slough SL3 6PL, Buckinghamshire,   England 
• Authors:
  • HOBBS, D W
• Publication Date: 1977-6

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 75-85
• Serial:
  • World Cement Technology
  • Volume: 8
  • Issue Number: 3
  • Publisher: Cement and Concrete Association

Subject/Index Terms

• TRT Terms: Alkali; Asbestos; Expansive cement; Fillers (Materials); Filters; Gypsum; Mortar; Portland cement; Shrinkage; Specifications; Standards; Strength of materials; Sulfites
• Old TRIS Terms: Alkalies; Asbestos fillers; Retarding
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00164401
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 8 1977 12:00AM