The carbonate bonded, press-moulded article is produced by press-moulding a particulate, carbonatable material that contains water and by carbonating the obtained compact with carbon dioxide gas. In order to be able to ensure an optimal compressive strength of the article two types of tests are provided. In the first type of test a sample of the particulate material is compressed with an increasing compaction pressure and when water starts to be expelled from the material as from a particular compaction pressure, the press-moulding step is performed with a compaction pressure which is at least 7 MPa smaller than this compaction pressure. In the second type of test different samples of the particulate material are press-moulded with different compaction pressures and, after having released the compaction pressure, the density of the compact is determined. In case this density decreases instead of increases as from a particular compaction pressure, the press-moulding step is performed with a compaction pressure which is smaller than this particular compaction pressure.

The carbonate bonded, press-moulded article is produced by press-moulding a particulate, carbonatable material that contains water and by carbonating the obtained compact with carbon dioxide gas. In order to be able to ensure an optimal compressive strength of the article two types of tests are provided. In the first type of test a sample of the particulate material is compressed with an increasing compaction pressure and when water starts to be expelled from the material as from a particular compaction pressure, the press-moulding step is performed with a compaction pressure which is at least 7 MPa smaller than this compaction pressure. In the second type of test different samples of the particulate material are press-moulded with different compaction pressures and, after having released the compaction pressure, the density of the compact is determined. In case this density decreases instead of increases as from a particular compaction pressure, the press-moulding step is performed with a compaction pressure which is smaller than this particular compaction pressure.

A macro-cement and associated methods useful for preparing pastes, mortars, concretes and other cement-based materials having high workability, high density, and high strength are disclosed. A method of producing a macro-cement includes cement, supplemental cementitious materials (SCM's), including siliceous submicron-sized particles and nano-sized particles, and polymers in the form of liquid or dry chemical admixtures for concrete. The cement mixture may be used for making ultra-high performance concrete (UHPC).

A macro-cement and associated methods useful for preparing pastes, mortars, concretes and other cement-based materials having high workability, high density, and high strength are disclosed. A method of producing a macro-cement includes cement, supplemental cementitious materials (SCM's), including siliceous submicron-sized particles and nano-sized particles, and polymers in the form of liquid or dry chemical admixtures for concrete. The cement mixture may be used for making ultra-high performance concrete (UHPC).

A cementitious composite for in-situ hydration includes a first layer, a second layer, a cementitious mixture including cementitious material positioned between the first layer and the second layer, and a structure layer positioned between the first layer and the second layer. The cementitious mixture comprises a majority of a volume between the first layer and the second layer.

A cementitious composite for in-situ hydration includes a first layer, a second layer, a cementitious mixture including cementitious material positioned between the first layer and the second layer, and a structure layer positioned between the first layer and the second layer. The cementitious mixture comprises a majority of a volume between the first layer and the second layer.

A cementitious composite for in-situ hydration includes a structure layer having a first side and an opposing second side, a cementitious material disposed within the structure layer, a sealing layer disposed along and coupled to the first side of the structure layer, and a containment layer disposed along the opposing second side of the structure layer. The structure layer has an intersection at the sealing layer and the containment layer that is at least partially fiberless. The cementitious material includes a plurality of cementitious particles. The containment layer is configured to prevent the plurality of cementitious particles from migrating out of the structure layer.

A cementitious composite for in-situ hydration includes a structure layer having a first side and an opposing second side, a cementitious material disposed within the structure layer, a sealing layer disposed along and coupled to the first side of the structure layer, and a containment layer disposed along the opposing second side of the structure layer. The structure layer has an intersection at the sealing layer and the containment layer that is at least partially fiberless. The cementitious material includes a plurality of cementitious particles. The containment layer is configured to prevent the plurality of cementitious particles from migrating out of the structure layer.

A cementitious composite for in-situ hydration includes a first layer, a second layer, a cementitious mixture, and an adhesive layer. The cementitious mixture is disposed along the first layer. The cementitious mixture includes a plurality of cementitious particles. The second layer is disposed along the cementitious mixture, opposite the first layer. The adhesive layer is positioned to secure at least one of (i) the first layer to the cementitious mixture, (ii) the second layer to the cementitious mixture, and (iii) the first layer and the second layer together. The first layer and the second layer are configured to at least partially prevent the plurality of cementitious particles from migrating out of the cementitious composite.

A cementitious composite for in-situ hydration includes a first layer, a second layer, a cementitious mixture, and an adhesive layer. The cementitious mixture is disposed along the first layer. The cementitious mixture includes a plurality of cementitious particles. The second layer is disposed along the cementitious mixture, opposite the first layer. The adhesive layer is positioned to secure at least one of (i) the first layer to the cementitious mixture, (ii) the second layer to the cementitious mixture, and (iii) the first layer and the second layer together. The first layer and the second layer are configured to at least partially prevent the plurality of cementitious particles from migrating out of the cementitious composite.