INVESTIGATION OF COLLOIDAL HYDRATED CALCIUM SILICATES. II. SOLUBILITY RELATIONSHIPS IN THE CALCIUM OXIDE-SILICA-WATER SYSTEM AT 25 DEGREES

IT WAS CONCLUDED FROM THE RESULTS THAT SEVERAL SOLID PHASES EXIST IN THE SYSTEM CALCIUM OXIDE-SILICON OXIDE-WATER AT 25 C: (1) SILICA AND SILICA THAT HAS PARTIALLY REACTED WITH CALCIUM HYDROXIDE AT CALCIUM OXIDE-SILICON OXIDE MOLE RATIOS LESS THAN 0.14, (2) PARTIALLY REACTED SILICA AND HYDRATED CALCIUM SILICATE AT MOLE RATIOS BETWEEN 0.14 AND 1, (3) HYDRATED CALCIUM SILICATE WITH VARYING AMOUNTS OF CALCIUM HYDROXIDE DISSOLVED IN IT FOR OVER-ALL CALCIUM OXIDE-SILICON OXIDE MOLE RATIOS GREATER THAN 1, AND (4) HYDRATED CALCIUM SILICATE AND CALCIUM HYDROXIDE AT OVER-ALL CALCIUM OXIDE-SILICON OXIDE RATIOS ABOVE ABOUT 1.75. THE EVIDENCE FOR A PHASE TRI-HYDRATED CALCIUM SILICATE IS NOT CONCLUSIVE. THE SOLUBILITY PRODUCT FOR HYDRATED CALCIUM SILICATE AND THE RATIO OF THE ACTIVITY OF THE CALCIUM HYDROXIDE DISSOLVED IN HYDRATED CALCIUM SILICATE TO THAT IN THE SOLUTION ARE CONSTANTS WHICH DESCRIBE THE SYSTEM IN THE CALCIUM OXIDE-SILICON OXIDE MOLE RATIO RANGE 1-1.75. /PCA/

• Authors:
  • Greenberg, S A
  • Chang, T N
• Publication Date: 0

Media Info

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

Subject/Index Terms

• TRT Terms: Calcium compounds; Hydrates; Hydroxides; Oxides; Silicates; Silicon compounds; Solubility; Water
• Old TRIS Terms: Solubility products
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213618
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 180
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM