Subsequently applied waterproof basements made of textile reinforced concrete using the spraying method: Fid-Bau Portal

Subsequently applied waterproof basements made of textile reinforced concrete using the spraying method

Mott, R. / Brameshuber, W.

Many regions in Germany show a rising groundwater level caused by different reasons. On the one hand it may happen as a result of the climate changes in general. On the other hand the shut-down of opencast pits in some regions and the involved cut-off of the appendant water drainage can also be a reason for the changing groundwater level. The rising level of groundwater has a direct effect on residential buildings not designed for this load case. The load case of buildings concerned changes from non-pressing water to pressing water. The buildings consist of base plates and masonry walls which are not completely waterproof. This leads to the problem that water penetrates the walls of the conventionally built basements. As long as the groundwater is non-pressing the water will not penetrate the walls. Thus, when the groundwater level rises and the load case changes from non-pressing to pressing water, the water can permeate the walls. The buildings concerned have to be refitted with a subsequent sealing. Presently there are several subsequent sealing methods to redevelop basements. It is possible to apply the sealing onto the walls from outside as well as from inside of the residential building. However, in most cases the subsequent sealings only seal the buildings against penetrating water. The changed load case and hence the additional static load are mostly not considered at all. Furthermore, conventional sealing methods often involve high complexity and high costs. In addition, sealing systems applied onto the inner walls are mostly associated with the loss of living space. To minimize the mentioned problems this paper presents the use of textile reinforced concrete as a subsequently applied waterproof structure. With this composite material it is possible to produce thin-walled concrete building members with a dense structure and high compressive as well as tensile strength.