HIGH-MAGNESIA PORTLAND CEMENTS: STUDIES ON CEMENTS PREPARED WITH REAGENT-GRADE CHEMICALS

SEVERAL PORTLAND CEMENT CLINKERS CONTAINING UP TO 15% MAGNESIUM OXIDE HAVE BEEN PREPARED WITH REAGENT-GRADE CHEMICALS, AND THE PROPERTIES OF CEMENTS MADE FROM THEM HAVE BEEN INVESTIGATED. IN PARTICULAR, THE EFFECT OF VARIATIONS IN COMPOSITION, BURNING TEMPERATURE AND COOLING CONDITIONS OF THE CLINKERS UPON THE AUTOCLAVE EXPANSION AND STRENGTH OF THE CORRESPONDING CEMENTS HAS BEEN EXAMINED IN DETAIL. IT IS NOT POSSIBLE BY CONTROLLING THESE FACTORS ALONE TO PRODUCE 'SOUND' (I.E. VOLUME-STABLE) PORTLAND CEMENTS HAVING MAGNESIUM OXIDE PERCENTAGES MUCH ABOVE THE PRESENT LIMITS RECOMMENDED BY THE STANDARDS IN DIFFERENT COUNTRIES. THE ADDITION OF A SUITABLE REACTIVE SILICATE MATERIAL IN FINELY DIVIDED FORM, E.G. PULVERIZED-FUEL ASH, EFFECTIVELY STABILIZES HIGH-MAGNESIA CEMENTS AND THESE MIXTURES PASS THE ASTM TEST FOR SOUNDNESS OF PORTLAND CEMENTS. DATA ON THE AUTOCLAVE EXPANSION AND MECHANICAL STRENGTH OF THESE MIXTURES OF HIGH-MAGNESIA CEMENT AND PFA ARE PRESENTED. /A/ RRL/

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00249831
• Supplemental Notes:
  • Vol 21, No 67, PP 67-78, 4 FIG, 4 TAB, 2 PHOT, 31 REF
• Authors:
  • Rehsi, S S
  • Majumdar, A J
• Publication Date: 1969-6

Media Info

• Serial:
  • MAGAZINE OF CONCRETE RESEARCH
  • Publisher: Thomas Telford Limited
  • ISSN: 0024-9831

Subject/Index Terms

• TRT Terms: Chemicals; Clinkers; Combustion; Cooling; Expansive cement; Magnesium; Materials selection; Oxides; Portland cement; Properties of materials; Reagents; Silicates; Soil stabilization; Strength of materials
• Uncontrolled Terms: Stabilization
• Old TRIS Terms: Auto cleaves
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00213098
• Record Type: Publication
• Source Agency: Road Research Laboratory /UK
• Files: TRIS
• Created Date: Sep 14 1970 12:00AM