A hydraulic cement composition is provided. The composition comprises a hydraulic cement and an anti-corrosion agent selected from the group consisting of one or more alkanolamines, one or more derivatives of alkanolamines, and combinations thereof. The composition can be mixed with water to form a carbon dioxide-resistant hydraulic cement slurry. A hydraulic cement slurry and a method of cementing in a carbon dioxide environment are also provided.

Composite cement compositions and pumpable slurries for cementing well or at least one zone of the wells are provided and comprise cementitious material that forms calcium silicate hydrates upon exposure to water, inert filler material, nano-sized calcium carbonate particles, and water, wherein the cementitious material has a mean particle size of at least about 0.5 micron and no more than about 20 microns, the inert filler material has particle sizes of at least about 25 microns and no more than about 2 millimeters (mm), and the compositions and slurries have densities of at least about 9.5 pounds per gallon (ppg) and no more than about 12.5 ppg and solid volume fractions of at least about 50%. Methods of cementing the wells or the at least one zone of the wells are also provided and comprise pumping the compositions and slurries into the well and allowing the compositions and slurries to set or cure to form or produce lightweight composite cements having compressive strengths of greater than 400 pounds per square inch.

In one embodiment, a method of manufacturing a dry geopolymer formulation. The method comprises obtaining the various constituents of the geopolymer formulation from one or more of a sand, a ground granulated blast furnace slag (GGBFS), a fly ash, sodium tetraborate, a boric acid, a zeolite, a sodium caseinate, SC-9, sodium metasilicate and sodium hydroxide; and mixing the constituents to a homogenous mixture. In another embodiment, the present disclosure describes a method of manufacturing a building material comprising obtaining the dry geopolymer formulation, mixing the hydrated formulation, dispensing the formulation; and curing the formulation.

A composition for use in a method or a system to stabilise a material such as geological strata or a rock mass in which initially retarded gypsum is accelerated at the time of introduction or injection into the rock mass. The retarding of the gypsum may be accomplished by a retarder such as a hydration inhibitor mixed with the gypsum and the acceleration may be accomplished by an accelerant added to mixture of the gypsum and retarder. Upon introduction of the accelerant, water is also added to initially reduce the viscosity of the composition so as to be less than the initially retarded gypsum so as to make it more easily pumpable before becoming set within the geological strata or a rock mass.

A method for providing a quick setting polymer modified cement composition within a pothole in a vehicular trafficked pavement substrate. The method includes preparing a wet polymer modified cement mixture by mixing a dry mixture including a cement, an aggregate, and a polymer in particulate form with a water-containing liquid. The quick setting polymer modified cement composition is prepared by mixing the wet polymer modified cement mixture with a quick setting (calcium aluminate cement) mixture (in wet or dry form). The quick setting mixture may be mixed with the wet polymer modified cement mixture in a mixer followed by providing the quick setting polymer modified cement composition to the potholes. Alternatively, the quick setting mixture may be mixed by providing (spraying) the quick setting mixture into the wet polymer modified cement mixture as it is being applied to the pothole. Topical items may be provided thereonto.

A cement composition comprising an aqueous fluid, a cement, and a cement retarder. The cement retarder comprises a biosurfactant, and is operable to retard cement thickening of the cement composition, relative to a same cement composition absent the cement retarder, over a temperature range of from about 40 F. (4.4 C.) to about 500 F. (260 C.), from about 40 F. (4.4 C.) to about 400 F. (204.4 C.), from about 50 F. (10 C.) to about 350 F. (176.7 C.), or from about 60 F. (15.6 C.) to about 250 F. (121.1 C.).