CONTROL OF THE LIME BALANCE IN PORTLAND CEMENT CLINKER

METHODS OF DETERMINING DEPARTURES OF PORTLAND CEMENT RAW MIXTURES FROM THE TECHNICAL LIME LIMIT ARE DESCRIBED. THESE METHODS INVOLVE CLINKERING SAMPLES AT A SUITABLE TIME AND TEMPERATURE, AND DETERMINING FREE LIME CONTENT. FOR SAMPLES THAT ARE, OR MAY BE, BELOW THE TECHNICAL LIME LIMIT, A KNOWN PERCENTAGE OF PURE CALCIUM CARBONATE IS ADDED BEFORE CLINKERING. EQUATIONS AND NOMOGRAPHS ARE PRESENTED FOR CALCULATING THE LIME EXCESS OR DEFICIENCY IN THE LATTER CASE. CONTROL TO SECURE A DESIRED LIME DEFICIENCY IN THE CEMENT CLINKER MAY BE DIRECT. THE ADVANTAGES ARE UNIFORM BURNABILITY OF THE RAW MIX, EFFICIENT KILN OPERATION AND CONSTANT HIGH QUALITY OF THE PRODUCT. /PCA/

• Authors:
  • Dahl, L A
• Publication Date: 0

Media Info

• Serial:
  • Portland Cement Assoc R & D Lab Bull
  • Issue Number: 0

Subject/Index Terms

• TRT Terms: Calcium carbonate; Calcium oxide; Clinkers; Control; Equations; Nomographs; Portland cement
• Old TRIS Terms: Lime requirement
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213526
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 78
• Files: TRIS
• Created Date: May 25 1970 12:00AM