WATER RESISTANT COMPOSITION AND METHOD FOR DEEPENING OR WIDENING A WATER BED

摘要

Described is a water resistant composition comprising a mixture of granular particles and bentonite particles, wherein the grain size distribution of the granular particles satisfies 1 d 50 6 mm and 5 d 90 15 mm, wherein the grain size distribution of the bentonite particles satisfies 0.0005 d 50 1.2 mm and 0.01 d 90 2.0 mm, and wherein the percentage by weight of bentonite particles in the mixture amounts to 0.1 - 20% by weight. The composition may be used to provide a water resistant layer, for instance in a method for deepening or widening a water bed. In such method, a sheet piling is arranged in a bank, bank material present on the waterside of the sheet piling is excavated to a depth at which at least a part of the natural water resistant bottom layer is removed, and a layer of a water resistant composition is arranged on the excavated bottom.