Colloid Electrochemistry of Saturated Cement Paste and Some Properties of Cement Based Materials

✍ Scribed by S. Chatterji

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 415 KB
• Volume: 7
• Category: Article
• ISSN: 1065-7355
• DOI: 10.1016/s1065-7355(97)00058-8

✦ Synopsis

In a cement hydration product-electrolyte system the hydration products are micron-sized charged particles. The principles of colloid electrochemistry predict that in such a system each solid particle is surrounded by a layer of concentrated solution of its counter-ion. The actual concentration of this layer depends on the surface charge and the concentration of the solution away from the particle, i.e., bulk solution. Divalent counter-ions preferentially concentrate around the solid particles. The principles also predict that the intrinsic diffusivity of an ion is proportional to the square root of its concentration in a solution. The literature on the expressed pore solution, ionic diffusivity through cement based materials, the formation factor, alkali-silica reaction, etc., has been examined from the point of view of colloid electrochemistry. Many of the reported but unexplained phenomena could be explained from the principles of colloid electrochemistry. Advanced Cement Based Materials 1998, 7, 102-108.