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 d50 6 mm and 5 d90 15 mm, wherein the grain size distribution of the bentonite particles satisfies 0.0005 d50 1.2 mm and 0.01 d90 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.