The average lifespan of a concrete water tank is 25 to 40 years. Over that time, the concrete needs to resist constant hydrostatic pressure of varying degrees from the inside or outside and may be in contact with chlorine and other chemicals that soften its surface. Traditionally, concrete tanks have not incorporated a waterproofing system until a problem has surfaced. Cracks have been filled with Oakum to stop water flow, epoxy coatings have been applied or polyurethane plastic liners have been welded together inside the tank to block water leakage. While these methods may have provided temporary relief, none have proven as effective as integral crystalline waterproofing. Cracks and defects repaired with crystalline systems will outlast traditional epoxy or urethane repairs. Crystalline waterproofing technology offered by Kryton International Inc., is a form of integral waterproofing, named as such because it becomes a part of the concrete matrix itself, whether applied to existing concrete or added to the concrete mix. Once crystalline waterproofing technology has been applied, crystals form internally upon their reaction to water, and penetrate deep into the concrete to seal pores and micro-cracks completely. This ability remains throughout the life of the structure – as cracks form in the concrete, crystals form and seal them. Using integral systems for water tank repairs can protect tanks from deterioration and extend the structure’s service life; provided that the repairs are made before the deterioration becomes too severe.
Source: Arab Construction World