ELECTRON OPTICAL INVESTIGATION OF THE HYDRATION PRODUCTS OF CALCIUM SILICATES AND PORTLAND CEMENT

BETA DICALCIUM SILICATE AND TRICALCIUM SILICATE HAVE BEEN HYDRATED AT ROOM TEMPERATURE BY 3 PROCEDURES: (1) HYDRATION IN PASTE FORM, WITH A WATER-TO-SOLID WEIGHT RATIO OF 0.7; (2) HYDRATION WITH AN EXCESS OF WATER IN A ROTATED POLYTHENE BOTTLE; AND (3) HYDRATION IN A SMALL STEEL BALL MILL. IN THE SECOND AND THIRD METHODS, THE WATER-TO-SOLID RATIO WAS 9.0. THE HYDRATION PRODUCTS HAVE BEEN EXAMINED IN THE ELECTRON MICROSCOPE AND A DESCRIPTION OF THE MORPHOLOGY OF THE PRODUCTS IS GIVEN. SERIES OF PASTES MADE FROM A NORMAL PORTLAND CEMENT AND A LOW-HEAT CEMENT, W/C = 0.4, CURED FOR TIMES RANGING FROM A FEW MINUTES TO SEVERAL MONTHS, HAVE BEEN STUDIED. A BRIEF ACCOUNT OF THE DEVELOPMENT OF COLLOIDAL HYDRATION PRODUCTS IN PORTLAND CEMENT PASTES IS GIVEN. THE RESULTS SUGGEST A MECHANISM FOR THE SETTING OF PORTLAND CEMENT PASTES. /PCA/

• Authors:
  • Copeland, L E
  • Schultz, E G
• Publication Date: 0

Media Info

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

Subject/Index Terms

• TRT Terms: Calcium compounds; Electron microscopes; Electrons; Hydration; Optical devices; Pastes; Portland cement; Silicates
• Old TRIS Terms: Electron optics
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00213576
• Record Type: Publication
• Source Agency: Portland Cement Association
• Report/Paper Numbers: No 135
• Files: TRIS
• Created Date: Jun 1 1970 12:00AM