Abstract: 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.

Abstract: 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 Mw=x·Mc. Mw is the mass of water per unit area of the cementitious composite. Mc 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.

Abstract: 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.

Abstract: 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.

Abstract: 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.

Abstract: 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 Mw=x·Mc. Mw is the mass of water per unit area of the cementitious composite. Mc 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.

Abstract: A cementitious composite includes a cementitious mixture of cementitious materials and non-cementitious materials. Prior to the in-situ hydration, Vb=Mc/?c·(1+Fv)+?in(Mnci/?nci) where Vb is the bulk volume of the cementitious mixture per unit area of the cementitious composite, Mc is a mass of the cementitious materials of the cementitious mixture per unit area of the cementitious composite, ?c is a density of the cementitious materials of the cementitious mixture, Mnci is a mass of each constituent type of the non-cementitious materials of the cementitious mixture per unit area of the cementitious composite, ?nci is a density of each constituent type of the non-cementitious materials of the cementitious mixture, and Fv is a ratio of the volume of the voids within the cementitious mixture relative to the volume of the cementitious materials of the cementitious mixture per unit area of the cementitious composite. Fv is between 0.64 and 1.35.

Abstract: 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.

Abstract: A cementitious composite for in-situ hydration includes a first layer, a second layer spaced from the first layer, and a cementitious mixture disposed between the first layer and the second 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 Mw=x·Mc. Mw is the mass of the water per unit area of the cementitious composite. Mc is a mass of the cementitious materials of the cementitious mixture per unit area of the cementitious composite. x is 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. x is between 0.25 and 0.55.

Abstract: A cementitious composite material for in-situ hydration includes a mesh layer, a cementitious material, a sealing layer, and a containment layer. The mesh layer has a first side and a second side. The mesh layer includes a plurality of discontinuous fibers arranged in a nonwoven configuration and coupled with one another. The cementitious material is disposed within the mesh layer. The cementitious material includes a plurality of cementitious particles. The sealing layer is disposed along the first side of the mesh layer and coupled to the plurality of discontinuous nonwoven fibers. The containment layer is disposed along the second side of the mesh layer and configured to prevent the plurality of cementitious particles from migrating out of the mesh layer.

Abstract: A cementitious composite for in-situ hydration includes a first layer, a second layer spaced from the first layer, and a cementitious mixture disposed between the first layer and the second 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 Mw=x·Mc. Mw is the mass of the water per unit area of the cementitious composite. Mc is a mass of the cementitious materials of the cementitious mixture per unit area of the cementitious composite. x is 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. x is between 0.25 and 0.55.

Abstract: A cementitious composite material for in-situ hydration includes a first layer having a nonwoven configuration and a cementitious material disposed within the first layer. The first layer has a first side and an opposing second side, and the first layer includes a plurality of discrete nodes spaced relative to one another along a first direction and a second direction. The cementitious composite material further includes a second layer disposed along the first side of the first layer and a third layer disposed along the opposing second side of the first layer and configured to prevent at least a portion of the plurality of cementitious particles from migrating out of the first layer. The cementitious material includes a plurality of cementitious particles, the first layer and the second layer include flexible materials, and the second layer is coupled to the first layer at the plurality of discrete nodes.

Abstract: A cementitious composite material for in-situ hydration includes a mesh layer, a cementitious material, a sealing layer, and a containment layer. The mesh layer has a first side and a second side. The mesh layer includes a plurality of discontinuous fibers arranged in a nonwoven configuration and coupled with one another. The cementitious material is disposed within the mesh layer. The cementitious material includes a plurality of cementitious particles. The sealing layer is disposed along the first side of the mesh layer and coupled to the plurality of discontinuous nonwoven fibers. The containment layer is disposed along the second side of the mesh layer and configured to prevent the plurality of cementitious particles from migrating out of the mesh layer.

Abstract: A cementitious composite material for in-situ hydration includes a first layer having a nonwoven configuration and a cementitious material disposed within the first layer. The first layer has a first side and an opposing second side, and the first layer includes a plurality of discrete nodes spaced relative to one another along a first direction and a second direction. The cementitious composite material further includes a second layer disposed along the first side of the first layer and a third layer disposed along the opposing second side of the first layer and configured to prevent at least a portion of the plurality of cementitious particles from migrating out of the first layer. The cementitious material includes a plurality of cementitious particles, the first layer and the second layer include flexible materials, and the second layer is coupled to the first layer at the plurality of discrete nodes.

Abstract: One embodiment of the present disclosure relates to a cementitious composite material for in-situ hydration that includes a mesh layer, a cementitious material, a sealing layer, and a containment layer. The mesh layer includes a plurality of fibers arranged in a nonwoven configuration and forms a mat having a first side and an opposing second side. The cementitious material is disposed within the mesh layer and includes a plurality of cementitious particles. The sealing layer is disposed along the first side of the mesh layer and is coupled to the plurality of fibers. The containment layer is disposed along the opposing second side of the mesh layer and is configured to prevent the plurality of cementitious particles from migrating out of the mesh layer.

Abstract: A packaged concrete additive includes ground, expanded perlite with a volume weighted mean particle size of approximately 10-100 ?m. The perlite optionally includes at least one additional component to improve workability and compensate for the natural tendency of expanded perlite to absorb water from the concrete mix. The additional component can include: water; a superplasticizer such as polycarboxylates, naphthalene sulfonate, and melamine sulfonate; or a hydrophobic compound, such as salts of fatty acids, fatty acids, silanes, and siloxanes. The additive is a flowable powder and for convenience of use it is packaged in a bag that can be directly added to the concrete batch and disappears on mixing. Concrete containing this additive displays superior properties to conventional concrete. Expanded perlite is a readily available raw material and the finished concrete is suitable where high strength structural concrete must withstand high temperatures.

Abstract: A packaged concrete additive includes ground, expanded perlite with a volume weighted mean particle size of approximately 10-100 ?m. The perlite optionally includes at least one additional component to improve workability and compensate for the natural tendency of expanded perlite to absorb water from the concrete mix. The additional component can include: water; a superplasticizer such as polycarboxylates, naphthalene sulfonate, and melamine sulfonate; or a hydrophobic compound, such as salts of fatty acids, fatty acids, silanes, and siloxanes. The additive is a flowable powder and for convenience of use it is packaged in a bag that can be directly added to the concrete batch and disappears on mixing. Concrete containing this additive displays superior properties to conventional concrete. Expanded perlite is a readily available raw material and the finished concrete is suitable where high strength structural concrete must withstand high temperatures.

Abstract: A concrete additive includes expanded perlite with a volume weighted mean particle size of approximately 10-100 ?m. The perlite further includes at least one additional component to improve workability and compensate for the natural tendency of expanded perlite to absorb water from the concrete mix. The additional component can include: water; a superplasticizer such as polycarboxylates, naphthalene sulfonate, and melamine sulfonate; or a hydrophobic compound such as salts of fatty acids, fatty acids, silanes, and siloxanes. The additive can be made in the form of a flowable powder or a flowable slurry. Concrete containing this additive displays superior properties to conventional concrete, including extremely high thermal resistance and high strength, low chloride ion permeability, and good early strength. The expanded perlite is a readily available raw material and the finished concrete is extremely cost effective for applications where a high strength structural concrete must withstand high temperatures.

Abstract: One embodiment of the present disclosure relates to a cementitious composite material for in-situ hydration that includes a mesh layer, a cementitious material, a sealing layer, and a containment layer. The mesh layer includes a plurality of fibers arranged in a nonwoven configuration and forms a mat having a first side and an opposing second side. The cementitious material is disposed within the mesh layer and includes a plurality of cementitious particles. The sealing layer is disposed along the first side of the mesh layer and is coupled to the plurality of fibers. The containment layer is disposed along the opposing second side of the mesh layer and is configured to prevent the plurality of cementitious particles from migrating out of the mesh layer.

Abstract: Disclosed is a coating composition that includes an aqueous emulsion of a hydrophobic acrylic polymer, a water-soluble polymer, and an inorganic filler, and further includes a freezing-point lowering component to permit low temperature application. The freezing-point lowering component will preferably include a water-soluble, corrosion inhibiting salt. The coating composition will also optionally and preferably include an evaporation enhancing component to promote faster drying and skin formation at low temperatures. The coating composition may be coated onto a construction surface (e.g., by spraying) where, after drying, it will form a fully adhered barrier membrane that is water-vapor permeable, but air and liquid-water impermeable. Such membrane will preferably have sufficient coating thickness and sufficiently high elongation that it will bridge joints and cracks.