A non-wicking underlayment board and methods for forming the same. The non-wicking underlayment board includes a foam core formed of closed cell foam with reinforcement layers encapsulated within the foam core. Outer facings formed of mineral coated nonwoven fibers are positioned on opposite faces of the non-wicking underlayment panel. The non-wicking underlayment board is useful for efficient and cost effective installation of barriers and surfaces in water-resistant and waterproof environments.

The present invention relates to a process for the production of a fiber-reinforced composite material with a polyamide matrix.

A cementitious composite includes a first layer, a second layer, and a cementitious mixture disposed between the first layer and the second layer. The cementitious mixture includes (i) cementitious materials and (ii) a viscosity modifier and/or an accelerator. The cementitious materials provide a void fraction between 0.64 and 1.35. The void fraction is defined as the ratio of the volume of the voids within the cementitious mixture per unit area of the cementitious composite to the volume of the cementitious materials per unit area of the cementitious composite. The cementitious mixture is configured to absorb a mass of water that provides a maximum 28 day compressive strength of the cementitious composite. A ratio of the mass of the water relative to the mass of the cementitious materials of the cementitious mixture per unit area of the cementitious composite that provides the maximum 28 day compressive strength of the cementitious composite is between 0.25 and 0.55.

A non-wicking underlayment board and methods for forming the same. The non-wicking underlayment board includes a foam core formed of closed cell foam with reinforcement layers encapsulated within the foam core. Outer facings formed of mineral coated nonwoven fibers are positioned on opposite faces of the non-wicking underlayment panel. The non-wicking underlayment board is useful for efficient and cost effective installation of barriers and surfaces in water-resistant and waterproof environments.

A cementitious composite includes a first layer, a second layer spaced from the first layer, a cementitious mixture disposed between the first layer and the second layer, and a structure layer disposed between the first layer and the second layer. The cementitious mixture is disposed within the structure layer. The cementitious mixture includes cementitious materials. The cementitious mixture is configured to absorb a mass of water that provides a maximum 28 day compressive strength of the cementitious composite upon curing which is represented by M.sub.w=x.Math.M.sub.c. M.sub.w is the mass of water per unit area of the cementitious composite. M.sub.c is a mass of cementitious materials of the cementitious mixture per unit area of the cementitious composite. x is a ratio of the mass of water relative to the mass of cementitious materials of the cementitious mixture per unit area of the cementitious composite. x is between 0.25 and 0.55.

A cementitious composite includes a structure layer, cementitious material, a first layer, and a second layer. The structure layer defines a plurality of open spaces. The cementitious material is disposed within the plurality of open spaces of the structure layer. The first layer is disposed along a first side of the structure layer. The second layer is disposed along an opposing second side of the structure layer. The second layer is positioned to prevent at least a portion of the cementitious material from migrating out of the structure layer.

A cementitious composite includes a structure layer, a cementitious material, a water-impermeable sealing layer, and a containment layer. The structure layer has a first side and an opposing second side. The structure layer defines a plurality of open spaces. The cementitious material includes a plurality of cementitious particles disposed within the plurality of open spaces of the structure layer. The water-impermeable sealing layer is disposed along the first side of the structure layer. The containment layer is disposed along the opposing second side of the structure layer. The containment layer is positioned to prevent the plurality of cementitious particles from migrating out of the structure layer through the containment layer.

A cementitious composite includes a first layer, a second layer, and a cementitious mixture disposed between the first layer and the second layer. The cementitious mixture includes (i) cementitious materials and (ii) a viscosity modifier and/or an accelerator. The cementitious materials provide a void fraction between 0.64 and 1.35. The void fraction is defined as the ratio of the volume of the voids within the cementitious mixture per unit area of the cementitious composite to the volume of the cementitious materials per unit area of the cementitious composite. The cementitious mixture is configured to absorb a mass of water that provides a maximum 28 day compressive strength of the cementitious composite. A ratio of the mass of the water relative to the mass of the cementitious materials of the cementitious mixture per unit area of the cementitious composite that provides the maximum 28 day compressive strength of the cementitious composite is between 0.25 and 0.55.

A cementitious composite includes a first layer, a second layer spaced from the first layer, a cementitious mixture disposed between the first layer and the second layer, and a structure layer disposed between the first layer and the second layer. The cementitious mixture is disposed within the structure layer. The cementitious mixture includes cementitious materials. The cementitious mixture is configured to absorb a mass of water that provides a maximum 28 day compressive strength of the cementitious composite upon curing which is represented by M.sub.w=x.Math.M.sub.c. M.sub.w is the mass of water per unit area of the cementitious composite. M.sub.c is a mass of cementitious materials of the cementitious mixture per unit area of the cementitious composite. x is a ratio of the mass of water relative to the mass of cementitious materials of the cementitious mixture per unit area of the cementitious composite. x is between 0.25 and 0.55.

A cementitious composite includes a structure layer, a cementitious material, a water-impermeable sealing layer, and a containment layer. The structure layer has a first side and an opposing second side. The structure layer defines a plurality of open spaces. The cementitious material includes a plurality of cementitious particles disposed within the plurality of open spaces of the structure layer. The water-impermeable sealing layer is disposed along the first side of the structure layer. The containment layer is disposed along the opposing second side of the structure layer. The containment layer is positioned to prevent the plurality of cementitious particles from migrating out of the structure layer through the containment layer.