Self healing of cracks in concrete

 

Quick on the heels of the trend towards “smart” buildings, the building industry is now witnessing a sharply increasing preference by designers and specifiers for self healing building materials. Research groups throughout the world have started to explore concepts and materials systems that impart self-healing properties for a variety of applications. The upcoming 1st International Conference on Self-Healing Materials in Noordwijk , Netherlands (April 18 to 20, 2007, visit www.selfhealingmaterials.nl for further information) will take stock of insights and benefits gathered thus far. The Penetron system exemplifies this emerging trend as it self-heals micro-cracks in concrete throughout the life of the structure.

Self healing of cracks in concrete

  1. The PENETRON® chemicals penetrate into the capillary tracts of the concrete by pressure of osmosis, Brownian movement and dry particle reactions.
  2. The active ingredients of PENETRON® react with various concrete minerals forming insoluble crystals which fill out cracks, pores and voids up to a width of at least 400 microns. This crystalline growth will eventually take place deep inside the concrete structure .
  3. Water molecules (and a wide range of chemicals) are no longer able to pass through the concrete. However, air can still pass allowing the concrete to breathe and avoiding vapor pressure to build.
  4. In the absence of further moisture, PENETRON® components lie dormant. Should moisture recur at any time, the sealing process resumes automatically and advances ever deeper into the concrete.

PENETRON® continuously seals and re-seals. Once applied, the effect of PENETRON® is permanent.