LAYERS OF CONCRETE OR LIKE COMPOSITIONS

摘要

1277260 Woven fabrics AROVA NIEDERLENZ AG and LOSINGER & CO AG 28 Nov 1969 [26 Sept 1969] 58309/69 Heading D1K In a two layer fabric adapted to be filled with a liquid hardenable composition such as concrete, each layer 2, 3, includes ground warps binder warps 1 which latter are woven so as to alternate between the layers and are longer than the ground warps whereby the layers can be pulled apart. The edges of the material are sealed e.g. by stitching and liquid concrete is forced between the layers so that they separate to the extent limited by the binder warps; alternatively the two layers may be pulled apart by a stretching device prior to the concrete being introduced. Reinforcing weft threads 10 of stronger material may be provided at the positions where the binder threads 10 cross over from one layer to the other.