Effect of Monolayer on Performance of Cement Based Materials and its Acting Mechanism

Abstract:

Based on the self-assembly of amphiphilic molecular, the dense and stable monolayer was formed at the water/air interface on the cement based materials surface. The formed monolayer could reduce water evaporation significantly at plastic stage. The results of the capillary pressure and plastic shrinkage testing at horizontal direction indicated that the inflection point of capillary pressure beginning to increase was delayed and the plastic shrinkage was decreased, which might be the reason of the decreased crack risks. And the results from hydration degree and pore structure showed that both the hydration degree and pore composition were improved, which might be beneficial to cement based materials durability. This novel monolayer technique had great potential to dissolve the plastic crack problem of cement-based materials at Northwest of China.

• Periodical: Materials Science Forum (Volumes 743-744)
• Pages: 346-352
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.743-744.346
• Online since: January 2013
• Authors: Lei Li, Wen Bin Wang
• Keywords: Cement, Durability, Monolayer, Plastic Crack, Water Evaporation

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