Cementitious compositions comprising lime, which may be foamed or non-foamed compositions, may increase carbon dioxide uptake of the cementitious compositions. Said cementitious compositions may be used in various cementing methods including pre-casting methods, cast-in-place methods, and primary or secondary cementing operations in a wellbore. The carbon dioxide may be added to the cementitious compositions during mixing, during pre-conditioning, during curing, or any combination thereof. Further, the carbon dioxide may be delivered as a gas (e.g., a gas that includes 1 vol % to 100 vol % carbon dioxide) or as a gas-entrained admixture that includes the gas, water, and a foaming agent.

A concrete with oil shale waste residue as aggregates and a preparation method thereof are provided by the present disclosure, belonging to the technical field of concrete. Oil shale waste residue is used to partially or completely replace the fine aggregates and coarse aggregates in the concrete, where the oil shale waste residue is deoiled oil shale waste residue. The oil shale waste residue is subjected to oil removal treatment and applied to the preparation of concrete.

Mineral fines reduce OPC content in concrete, mortar and other cementitious compositions, typically in combination with a pozzolanically active SCM. Mineral fines can replace and/or augment a portion of hydraulic cement and/or fine aggregate. Mineral fines can replace a portion of cement binder and fine aggregate as an intermediate that fills a size void between largest cement particles and smallest fine aggregate particles. Supplemental lime can enhance balance of calcium ions in the mix water and/or pore solution. Supplemental sulfate can address sulfate deficiencies caused by high clinker reduction, use of water reducers and/or superplasticizers, and SCMs containing aluminates. Concentrated or pure carbon dioxide (CO.sub.2) can be used to passivate alkaline values in highly alkaline materials, such as concrete washout fines, CKD, class C flyash, incinerator ash, bottom ash, or biomass ash. CO.sub.2 passivation or sequestration can be carried out before, during or after forming an initial concrete mix.

A method of producing composites from inorganic materials by processing with thermoplastic forming techniques mixtures containing one or more inorganic, fine residual materials and one or more polymers based on ethylenically unsaturated monomers in the form of protective colloid-stabilized, water-redispersible polymer powders, wherein the inorganic, fine residual materials are based on inorganic materials selected from the group consisting of gypsum, lime, talc, silicas, kaolins, silicates and titanium dioxide, and wherein the composites are based on from 5 to 80% by weight of polymers based on ethylenically unsaturated monomers and from 20 to 95% by weight of inorganic, fine residual materials, based on the total weight of polymer based on ethylenically unsaturated monomers and inorganic, fine residual materials.

A method of producing composites from inorganic materials by processing with thermoplastic forming techniques mixtures containing one or more inorganic, fine residual materials and one or more polymers based on ethylenically unsaturated monomers in the form of protective colloid-stabilized, water-redispersible polymer powders, wherein the inorganic, fine residual materials are based on inorganic materials selected from the group consisting of gypsum, lime, talc, silicas, kaolins, silicates and titanium dioxide, and wherein the composites are based on from 5 to 80% by weight of polymers based on ethylenically unsaturated monomers and from 20 to 95% by weight of inorganic, fine residual materials, based on the total weight of polymer based on ethylenically unsaturated monomers and inorganic, fine residual materials.