HYDRATION AND STRENGTH OF A PORTLAND CEMENT SPECIMEN SUBJECTED TO EARLY DRYING OUT

THE STRENGTH DEVELOPMENT AND HYDRATION WERE MEASURED ON SMALL CYLINDERS OF CEMENT PASTE. SOME OF THE SPECIMENS WERE DRIED OUT AT 115 DEG. C & WERE THEN STORED AT 100% RELATIVE HUMIDITY AFTER THE FIRST, SECOND OR THIRD DAY RESPECTIVELY. IN THE CASE OF THE SPECIMENS WHICH HAD BEEN DRIED, AFTER THE FIRST DAY THE DEGREE OF HYDRATION WAS STILL FOUND TO UNDERGO A MEASURABLE INCREASE DURING MOIST STORAGE, WHEREAS FOR THE OTHER SPECIMENS, WHICH HAD BEEN CURED FOR MORE THAN TWO DAYS WAS NO ASCERTAINABLE INCREASE IN THE DEGREE OF HYDRATION AS A RESULT OF THE SUBSEQUENT MOIST STORAGE. FOR SPECIMENS STORED UNDER MOIST CURING CONDITIONS THROUGHOUT, THE STRENGTH FOR DEGREES OF HYDRATION ALPHA GREATER OR EQUAL TO 0.3 IS A LINEAR FUNCTION OF ALPHA. AGAINST THIS, IN THE CASE OF THE TEMPORARILY DRIED SPECIMENS THE STRENGTH INCREASES FURTHER DURING MOIST STORAGE EVEN IN THE ABSENCE OF ANY CHANGE IN THE DEGREE OF HYDRATION. /AUTHOR/

• Supplemental Notes:
  • Vol 19, No 98 PP 448-451
• Authors:
  • Wittmann, F
• Publication Date: 1966-9

Media Info

• Serial:
  • Zement-Kalk-Gips

Subject/Index Terms

• TRT Terms: Drying; Handling and storage; Humidity; Hydration; Moisture content; Portland cement; Storage facilities; Strength of materials
• Old TRIS Terms: Moist condition
• Subject Areas: Freight Transportation; Highways; Materials; Terminals and Facilities;

Filing Info

• Accession Number: 00212516
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 1 1970 12:00AM