Basically Waterproofing – Basically waterproofing; It is divided into three as waterproofing against ground moisture, against unpressurized water and against pressurized water. Basically, polymer bituminous covers, plastic/rubber-based synthetic covers or spreading-based waterproofing materials can be used in waterproofing applications.
Whichever system is chosen, the foundations of the structures must be strong enough to carry the building above them throughout its life. However, in order for it to be long-lasting on its own, it is not enough that the foundation is made of sufficient strength. The foundations must be insulated against water and the corrosive effects of water.
Pressurized Water Insulation
They are waters that exert a constant and certain hydrostatic pressure on the structure and insulation. E.g; Groundwater in the area where the building will be built is an example of pressurized water. The consumption of waterproofing materials to be used is determined depending on the load applied by the building to the ground and the hydrostatic water pressure it is exposed to.
In general, basically waterproofing; In detached structures that allow the building to be excavated with a slope, external bundling is performed, and in adjacent structures where it is not possible to dig a sloped foundation pit, internal bundling is carried out.
Basically Waterproofing with External Bundling
The foundation pit should be secured with a slope to prevent landslides. The ground water is reduced below the foundation floor level with appropriate methods and full drying is achieved on the ground. The base concrete is prepared in such a way that it overflows at least 60 cm from the foundation wall boundary and beveled inward. Polymer bitumen cover with polyester felt carrier as waterproofing material, plastic/rubber-based synthetic covers or coating-based waterproofing
materials can be used.
It is preferred in adjoining structures or in cases where there is not sufficient slope clearance for human work, except for foundation bulkheads. In this system, the continuity of the insulation is ensured by insulating the inner surface of an outer bowl horizontally and vertically at once, and the building sits in this pool. In the initial stage, the reinforced concrete outer bowl is formed. After chamfering the corners, a cold-applied primer emulsion is applied to the inner surface of the outer bowl at a consumption of 0.400 kg per m².
After the insulation is completed with polymer bitumen covers with 2 layers of polyester felt carrier in the outer bowl, both horizontally and vertically, the insulation layers on both planes are taken under protection. Finally, the building’s load-bearing system (radial foundation and shear walls and inner bowl) is completed.
If synthetic waterproofing membranes are used in this detail, the inner surface of the outer bowl is covered with at least 500 gr/m² separating geotextile felt at the first stage. Synthetic drapes on the PVC discs mounted on the dish.
The application is completed with a single layer of cover and after a second geotextile felt is applied on it, a protection layer is placed. Finally, the structural system of the building is constructed.
Basically Waterproofing Against Ground Moisture
Ground moisture; It is the water that is always present on the ground, enters the structure through capillary and causes damage, and the degree of effectiveness varies depending on the type of ground. Ground moisture;
Water that provides adherence with ground particles and does not leak,
The water hanging in the corners between the ground particles,
The water that surrounds the soil particles in the form of a thin film,
It can be considered as capillary absorbed water from groundwater or pond water.
Basically Waterproofing Against Unpressurized Water
Water that can drip, flow is generally called unpressurized water. Water leaking from precipitation or utility water from irrigation is absorbed by the soil, while it drains through the curtain walls. These waters; It exerts either no or temporary hydrostatic pressure on the structure and insulation.