Cementitious composite

A rigid or semi-rigid cementitious composite comprising:

• a high loft non-woven layer having a first face and a second face, the second face separated from the first face by a space, wherein the high loft non-woven layer comprises bulking fibers and a binding material, wherein at least a portion of the bulking fibers are connected to other bulking fibers within the high loft non-woven layer through the binding material,
• wherein the distance between the first face and second face does not vary by more than 20% in a localized distance across the high loft non-woven layer when the high loft non-woven layer is in a flat state or has a radius of curvature of not less than the thickness of the non-woven layer;
• a cured rigid or semi-rigid solid located in the high loft non-woven, a filter layer on the first face of the high loft non-woven layer, wherein the filter layer comprises pores that are sufficiently small as to retain at least a portion of the settable powder within the high loft non-woven but allow the passage of the liquid;
• and,
• a liquid barrier layer on the second face of the high loft non-woven layer, wherein the liquid barrier layer has a coefficient of water permeability of less than about 1×10−8 m/s.

A flexible cementitious composite capable of becoming rigid or semi-rigid comprising:

• a high loft non-woven layer having a first face and a second face, the second face separated from the first face by a space, wherein the high loft non-woven layer comprises bulking fibers and a binding material, wherein at least a portion of the bulking fibers are connected to other bulking fibers within the high loft non-woven layer through the binding material;
• a settable powder located in the high loft non-woven layer, wherein the settable powder is capable of setting to a rigid or semi-rigid solid on the addition of a liquid;
• a filter layer on the first face of the high loft non-woven layer, wherein the filter layer comprises pores that are sufficiently small so as to retain at least a portion of the settable powder within the high loft non-woven but allow the passage of the liquid;
• and
• a liquid barrier layer on the second face of the high loft non-woven layer, wherein the liquid barrier layer has a coefficient of water permeability of less than about 1×10−8 m/s, wherein within the strain range of −20% to 20%, −20% to 0%, or 0% to 20%, the liquid barrier layer and the filter layer have a difference in in-plane stiffness of at least about 200%.

A rigid or semi-rigid cementitious composite comprising:

• a high loft non-woven layer having a first face and a second face, the second face separated from the first face by a space, wherein the high loft non-woven layer comprises bulking fibers and a binding material, wherein at least a portion of the bulking fibers are connected to other bulking fibers within the high loft non-woven layer through the binding material;
• a cured rigid or semi-rigid solid located in the high loft non-woven, a filter layer on the first face of the high loft non-woven layer, wherein the filter layer comprises pores that are sufficiently small as to retain at least a portion of the settable powder within the high loft non-woven but allow the passage of the liquid;
• and,
• a liquid barrier layer on the second face of the high loft non-woven layer, wherein the liquid barrier layer has a coefficient of water permeability of less than about 1×10−8 m/s, wherein within the strain range of −20% to 20%, −20% to 0%, or 0% to 20%, the liquid barrier layer and the filter layer have a difference in in-plane stiffness of at least about 200%.