Pore size distribution and oxygen diffusion resistance of polymer-modified mortars

✍ Scribed by Y. Ohama; K. Demura; K. Kobayashi; Y. Satoh; M. Morikawa

• Publisher: Elsevier Science
• Year: 1991
• Tongue: English
• Weight: 334 KB
• Volume: 21
• Category: Article
• ISSN: 0008-8846
• DOI: 10.1016/0008-8846(91)90012-7

✦ Synopsis

The present paper deals with the resistance of oxygen diffusion of polymer-modified mortars which are often used as low-cost promising materials for repairing work for various reinforced concrete structures. The polymermodified mortars using three types of commercial polymer dispersions, i.e., styrene-butadiene rubber latexes, ethylene-vinyl acetate and polyacrylic ester emulsions, and tested for pore size distribution by mercury porosimetry and oxygen diffusion by a diffusion cell method. It is concluded from the test results that the oxygen diffusion resistance of the polymer-modified mortars is superior to that of unmodified mortar, and is markedly improved with an increase in the polymer-cement ratio.

The use of such mortars can be recommended as effective materials for preventing the wet corrosion of reinforcing bars in the concrete structures.