This rapid-hardening cement composition includes: a rapid-hardening admixture; and cement in an amount of 100 parts by mass to 2,000 parts by mass with respect to 100 parts by mass of the rapid-hardening admixture, wherein the rapid-hardening admixture is a composition that contains: calcium aluminate; inorganic sulfate in an amount of 50 parts by mass to 200 parts by mass with respect to 100 parts by mass of the calcium aluminate; and a setting modifier in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the calcium aluminate, and an average particle diameter of the calcium aluminate is in a range of 8 m to 100 m, and an average particle diameter of the setting modifier is in a range of 5 m or less.

This rapid-hardening mortar composition includes: a rapid-hardening admixture; cement; and a fine aggregate, wherein the cement is contained in an amount of 100 parts by mass to 2,000 parts by mass with respect to 100 parts by mass of the rapid-hardening admixture, the rapid-hardening admixture is a composition that contains: calcium aluminate; inorganic sulfate in an amount of 50 parts by mass to 200 parts by mass with respect to 100 parts by mass of the calcium aluminate; and a setting modifier in an amount of 0.1 parts by mass to 10 parts by mass with respect to 100 parts by mass of the calcium aluminate, and an average particle diameter of the calcium aluminate is in a range of 8 m to 100 m, and an average particle diameter of the setting modifier is in a range of 5 m or less.

The present invention relates to the use of a sequenced polymer as an agent for monitoring the filtrate and the rheology of a fluid injected under pressure into an oil rock, wherein the fluid comprises solid particles and/or is brought into contact with solid particles within the oil rock after being injected, the polymer comprising: a first block which is adsorbed onto at least some of the particles; and a second block having a composition other than that of the first block and a mean molecular weight of more than 10,000 g/mol, for example more than 100,000 g/mol, and which is soluble in the fluid.

Referred innovation is a constructive process by direct application of epoxy grout in the gaps between ceramic coatings or other materials, which provides uniformity and homogeneity in the application of the grout, through the use of an epoxy grout compound, mixed in the homogenizing nozzle of a tubular double pipe, where the reagents acquire the desired physical-chemical characteristics, transforming into the epoxy grout mass to be applied, furnishing the controlled distribution of the epoxy grout by the nozzle of the pistol directly in the trail of the gaps, in a continuous and uniform manner, without pouring any excess to the sides.

A method for production of a grout comprises the steps of: a) acquiring a batch cement for a ball mill, b) forming in the ball mill a cement powder also called a nano-cement powder, c) pouring the nano-cement powder obtained in step b) to a rotary mixer, d) adding water to the rotary mixer, e) mixing the water and the nano-cement powder until a homogenous mixture of the nano-grout or the nano-slurry is obtained, f) pouring the nano-grout or the nano-slurry obtained in step e) from the rotary mixer to a distributing device.

A grouting method comprises the steps of: a) preparing the construction site for the grouting application, b) applying a grouting material to the construction site or specific places of the construction site, c) curing the applied grouting material for a predetermined amount of time, wherein the grouting material is the nano-grout or the nano-slurry.

Bentonite-based grout fluids and methods of using the grout fluids are provided. A method of using a grout fluid includes placing a geothermal conduit in at least one hole in the earth, providing a grout fluid including a bentonite-based grout at a concentration of about 15 pounds to about 25 pounds of bentonite-based grout per about 11.5 gallons (e.g., 12 gallons) to about 27 gallons of water, and introducing the grout fluid into the at least one hole adjacent to the geothermal conduit.

The present invention relates to a process for producing a redispersible dispersion powder, to the redispersible dispersion powder obtainable by this process, to an aqueous dispersion obtainable by step (1) of this process, and to a building material composition comprising the redispersible dispersion powder and/or the aqueous dispersion, to the use of the redispersible dispersion powder in a building material composition and to the use of the aqueous dispersion for production of a redispersible dispersion powder.

A concrete, mortar or grout formulation comprises two separate components: a concrete admixture comprising: (a) a concrete mixture; (b) alkali carbonate; (c) aretarder; and (d) water, an accelerator mixture comprising: (a) anaccelerator component; and (b) water.

The invention relates to the use of carboxylic acid-based polyoxyalkylenes as low-emissions shrinkage reducers in mineral binders, to methods of reducing shrinkage and to corresponding compositions.

The invention relates to radiation-treated reinforcement fibers, reinforced asphalt and portland cement concrete, and grout, methods for producing the same and application for their use. The radiation treatment includes exposing reinforcement fibers to electromagnetic energy, e.g., gamma rays, and/or electron-beam (E-beam) radiation. As a result of the treatment, the radiation-treated reinforcement fibers have a modified or deformed surface, e.g., an abraded and/or porous surface, as compared to reinforcement fibers without a radiation treatment.