Considering many unfavorable factors including those as aggressive environment, water action on concrete structures, environmental degradation water tank waterproofing has become not an additional, but an essential method for the structure long service life. Water tank waterproofing includes the whole set of works that are performed using special products and provide the protection of industrial- or residential-purpose objects or constructions from aggressive attacks in future.
There exist two main indications of operational water tank waterproofing disfunction: the first one is fall of water level in the tank, the second one — water quality deterioration in the tank due to water penetration from the outside (subterranean and melt waters, atmospheric precipitation).
For water tank waterproofing reconstruction the waterproofing repair and reconstruction of concrete water tank surface complex technological solutions are needed. The choice of complex technological solution depends on water tank operation conditions and its purpose.
Water tank waterproofing products selection
When selecting the manufacturer of waterproofing products for water tank repair and reconstruction it is important to pay attention to the following criteria:
- system approach when applying technological solutions;
- the surface elasticity, its resistance to permanent deformations;
- technical characteristics maintenance during the longstanding lifetime;
- environmental disposal, the allowability of application in touch with pure water (for water tanks designed for pure water storage);
- aggressive liquids and gases attacks resistance.
Water tank repair and waterproofing materials application
There exist several types of waterproof sealants for water tank concrete surface. The waterproof coating type depends on the operation conditions of a specific water tank.
Let’s consider 3 of the most widespread technological solutions for operational water tank repair and waterproofing.
- Variant №1. The water tank inner surface repair and waterproofing with an elastic compound. This variant is applied in case of dynamic loads, movements, microvibrations with possible occurrence of microcracks.
- Variant №2. The water tank inner surface repair and waterproofing with a penetrant compound combining with elastic waterproofing. This variant is applied as a waterproofing of advanced reliability, that includes all the advantages of the 1st variant.
- Variant №3. The water tank inner surface repair and waterproofing with a penetrant compound combining with protective coating. This variant Is applied in case of aggressive environment action on waterproofing surface.