NONLINEAR WATER DIFFUSION IN NONSATURATED CONCRETE

EQUATIONS GOVERNING DRYING AND WETTING OF CONCRETE ARE FORMULATED, ASSUMING THE DIFFUSIVITY AND OTHER MATERIAL PARAMETERS TO BE DEPENDENT ON PORE HUMIDITY, TEMPERATURE, AND DEGREE OF HYDRATION. BY FITTING OF COMPUTER SOLUTIONS FOR SLABS, CYLINDERS, AND SPHERES AGAINST NUMEROUS TEST DATA AVAILABLE IN THE LITERATURE IT IS FOUND THAT THE DIFFUSION COEFFICIENT DECREASES ABOUT 10 TO 20 TIMES WHEN PASSING FROM 0.9 TO 0.6 PORE HUMIDITY. TO ENABLE EASY PREDICTION OF DRYING OF SIMPLE BODIES, CHARTS FOR THE SOLUTION IN TERMS OF NONDIMENSIONAL VARIABLES ARE PRESENTED. /DOT/

• Authors:
  • Bazant, Z P
  • NAJJAR, L J
• Publication Date: 1972-1

Media Info

• Pagination: p. 3-20
• Serial:
  • Matls & Structures, Res & Testing /Fr/
  • Volume: 5
  • Issue Number: 25

Subject/Index Terms

• TRT Terms: Concrete; Diffusion (Optics); Humidity; Hydration; Information processing; Mathematical analysis; Temperature; Wetting and drying tests
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00214202
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 8 1973 12:00AM