Damp proofing of swimming pools – tanks” “Basic and essential condition of proper functionality of the swimming pools and the water tanks is no loss of water. Otherwise, problems are created, that require high direct and indirect costs in order to be restored.
The cost of interrupted function can be considered as an indirect cost (eg drinking water tank in a hotel, hospital, etc.). In addition, in case of failure and continuous leakage, there is a continuous cost due to both energy and water consumption for the continuous filling of the pool or the tank. In addition, the adjoining spaces are significantly affected. ” «DAMP PROOFING OF POOLS WITH CEMENT BASED MORTAR” “The damp proofing of concrete is made from the inner side of the swimming pool with damp proofing cement based materials, preferably of crystallic structure and with deep penetrating properties. This damp proofing is a barrier to any leakage of pool water, but also to the inflow of any groundwater towards the inside of the pool.
These materials, de facto, cannot be elastic. It is well known that cement based elastic sealing mortars are only resistant to positive (and not to negative) water pressure. Therefore, they could not possibly prevent the inflow of groundwater. ” “The below require extra attention: The pool walls should not exceed the specified length without the provision for an expansion joint, since the next layer, the flattening cement mortar, is not as elastic as the underlying layer (the elastic cement damp proofing material) and usually cracks. The point of inclination change of the pool is the point where the pool begins to deepen.
It is a vulnerable point and should be investigated by the static engineer during the phase of the technical study, because of the abrupt and uneven burden placed on the deeper part of the pool in relation to its elevated section. At this point, there is usually a differential subsidence observed and a subsequent failure of the damp proofing layer.
